{
	"statusCode": 424,
	"statusMessage": "exception in stage5 chrome browser.   see meta.trace for details on all fatal errors found.  errMsg=load targetUrl failed.  rawMsg=net::ERR_TIMED_OUT at https://gsmnet.si/pages/brands/huawei",
	"originalRequest": {
		"pages": [
			{
				"url": "https://gsmnet.si/pages/brands/huawei",
				"renderType": "html",
				"outputAsJson": false,
				"proxy": "anon-any"
			}
		]
	},
	"pageResponses": [
		{
			"navUrl": "chrome-error://chromewebdata/",
			"navId": 1,
			"statusCode": 424,
			"eventPhase": "initialRequest",
			"doneDetail": {
				"reason": "fatalError:pageExec fatal error.  main frame navigation failed due to reason=failed for navUrl=https://gsmnet.si/pages/brands/huawei endDetail=net::ERR_TIMED_OUT",
				"statusCode": 424
			},
			"resourceSummary": {
				"complete": 0,
				"failed": 0,
				"aborted": 0,
				"orphaned": 0,
				"active": 0,
				"late": 0
			},
			"resources": [],
			"debugDiags": [],
			"contentErrors": [],
			"errors": [
				{
					"name": "FatalError",
					"message": "pageExec fatal error.  main frame navigation failed due to reason=failed for navUrl=https://gsmnet.si/pages/brands/huawei endDetail=net::ERR_TIMED_OUT",
					"statusCode": 424
				}
			],
			"metrics": {
				"startTime": "2026-04-27T12:25:20.388Z",
				"endTime": "2026-04-27T12:25:50.504Z",
				"elapsedMs": 30116,
				"pageStatus": ""
			},
			"headers": [],
			"cookies": [],
			"events": [
				{
					"timeMs": 0,
					"elapsedMs": 0,
					"key": "pageExec",
					"value": {
						"message": "begin",
						"targetUrl": "https://gsmnet.si/pages/brands/huawei"
					},
					"time": "2026-04-27T12:25:20.388Z"
				},
				{
					"timeMs": 0,
					"elapsedMs": 0,
					"key": "pageExec",
					"value": "apply settings",
					"time": "2026-04-27T12:25:20.388Z"
				},
				{
					"timeMs": 10,
					"elapsedMs": 10,
					"key": "pageExec",
					"value": "done apply overrides",
					"time": "2026-04-27T12:25:20.398Z"
				},
				{
					"timeMs": 12,
					"elapsedMs": 2,
					"key": "pageExec",
					"value": "begin binding config",
					"time": "2026-04-27T12:25:20.400Z"
				},
				{
					"timeMs": 12,
					"elapsedMs": 0,
					"key": "pageExec",
					"value": {
						"message": "targetUrl initialRequest begin",
						"targetUrl": "https://gsmnet.si/pages/brands/huawei"
					},
					"time": "2026-04-27T12:25:20.400Z"
				},
				{
					"timeMs": 18,
					"elapsedMs": 6,
					"key": "request",
					"value": {
						"startPhase": "initialRequest",
						"request": {
							"url": "https://gsmnet.si/pages/brands/huawei",
							"frameName": "",
							"frameId": "0FD2C4C47F14C6BCF22BA2DF083C19AA",
							"isMainFrame": true,
							"headers": {
								"accept-language": "en-US,en;q=0.9",
								"upgrade-insecure-requests": "1",
								"user-agent": "Mozilla/5.0 (Linux; Android 6.0.1; Nexus 7 Build/MOB30X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3765.0 Safari/537.36",
								"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7"
							},
							"isNavigationRequested": true,
							"method": "GET",
							"redirectChain": [],
							"resourceType": "document",
							"failure": null
						}
					},
					"time": "2026-04-27T12:25:20.406Z"
				},
				{
					"timeMs": 30113,
					"elapsedMs": 30095,
					"key": "fatalError",
					"value": {
						"message": "pageExec fatal error.  main frame navigation failed due to reason=failed for navUrl=https://gsmnet.si/pages/brands/huawei endDetail=net::ERR_TIMED_OUT",
						"statusCode": 424
					},
					"time": "2026-04-27T12:25:50.501Z"
				},
				{
					"timeMs": 30115,
					"elapsedMs": 2,
					"key": "request",
					"value": {
						"error": {
							"name": "TypeError",
							"message": "Cannot read properties of null (reading 'headers')",
							"stack": []
						}
					},
					"time": "2026-04-27T12:25:50.503Z"
				},
				{
					"timeMs": 30116,
					"elapsedMs": 1,
					"key": "pageExec",
					"value": {
						"message": "recording results.",
						"url": "about:blank"
					},
					"time": "2026-04-27T12:25:50.504Z"
				},
				{
					"timeMs": 30136,
					"elapsedMs": 20,
					"key": "recordPageResponse",
					"value": {
						"message": "recording results: got all cookies",
						"count": 0
					},
					"time": "2026-04-27T12:25:50.524Z"
				},
				{
					"timeMs": 30136,
					"elapsedMs": 0,
					"key": "recordPageResponse",
					"value": {
						"message": "start pageResponse.frameData (__serializeFrame)"
					},
					"time": "2026-04-27T12:25:50.524Z"
				},
				{
					"timeMs": 30164,
					"elapsedMs": 28,
					"key": "frameNavigated",
					"value": {
						"frame": {
							"isMainFrame": true,
							"url": "chrome-error://chromewebdata/",
							"name": "",
							"id": "0FD2C4C47F14C6BCF22BA2DF083C19AA"
						}
					},
					"time": "2026-04-27T12:25:50.552Z"
				},
				{
					"timeMs": 30164,
					"elapsedMs": 0,
					"key": "pageExec",
					"value": {
						"message": "page.navigated",
						"url": "chrome-error://chromewebdata/",
						"isNewPage": true
					},
					"time": "2026-04-27T12:25:50.552Z"
				},
				{
					"timeMs": 30204,
					"elapsedMs": 40,
					"key": "meta",
					"value": "window._pjscMeta constructed{\"currentWrite\":null,\"pendingWrites\":0,\"currentReads\":0,\"pendingReads\":0,\"value\":\"no\"}",
					"time": "2026-04-27T12:25:50.592Z"
				},
				{
					"timeMs": 30210,
					"elapsedMs": 6,
					"key": "recordPageResponse",
					"value": {
						"message": "start pageResponse.resources"
					},
					"time": "2026-04-27T12:25:50.598Z"
				},
				{
					"timeMs": 30210,
					"elapsedMs": 0,
					"key": "recordPageResponse",
					"value": {
						"message": "start pageResponse.automationResult"
					},
					"time": "2026-04-27T12:25:50.598Z"
				},
				{
					"timeMs": 30210,
					"elapsedMs": 0,
					"key": "recordPageResponse",
					"value": {
						"message": "made pageResponse object"
					},
					"time": "2026-04-27T12:25:50.598Z"
				},
				{
					"timeMs": 30210,
					"elapsedMs": 0,
					"key": "recordPageResponse",
					"value": {
						"message": "start pageResponse.errors (push)"
					},
					"time": "2026-04-27T12:25:50.598Z"
				},
				{
					"timeMs": 30210,
					"elapsedMs": 0,
					"key": "pageExec",
					"value": {
						"message": "finish recording results.",
						"url": "chrome-error://chromewebdata/"
					},
					"time": "2026-04-27T12:25:50.598Z"
				}
			],
			"frameData": {
				"name": "",
				"id": "0FD2C4C47F14C6BCF22BA2DF083C19AA",
				"childCount": 0,
				"childFrames": [],
				"content": "<!DOCTYPE html><html dir=\"ltr\" lang=\"en\"><head>\n  <meta charset=\"utf-8\">\n  <meta name=\"color-scheme\" content=\"light dark\">\n  <meta name=\"theme-color\" content=\"#fff\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0,\n                                 maximum-scale=1.0, user-scalable=no\">\n  <title>gsmnet.si</title>\n  <style>/* Copyright 2017 The Chromium Authors\n * Use of this source code is governed by a BSD-style license that can be\n * found in the LICENSE file. */\n\na {\n  color: var(--link-color);\n}\n\nbody {\n  --background-color: #fff;\n  --error-code-color: var(--google-gray-700);\n  --google-blue-50: rgb(232, 240, 254);\n  --google-blue-100: rgb(210, 227, 252);\n  --google-blue-300: rgb(138, 180, 248);\n  --google-blue-600: rgb(26, 115, 232);\n  --google-blue-700: rgb(25, 103, 210);\n  --google-gray-100: rgb(241, 243, 244);\n  --google-gray-300: rgb(218, 220, 224);\n  --google-gray-500: rgb(154, 160, 166);\n  --google-gray-50: rgb(248, 249, 250);\n  --google-gray-600: rgb(128, 134, 139);\n  --google-gray-700: rgb(95, 99, 104);\n  --google-gray-800: rgb(60, 64, 67);\n  --google-gray-900: rgb(32, 33, 36);\n  --heading-color: var(--google-gray-900);\n  --link-color: rgb(88, 88, 88);\n  --primary-button-fill-color-active: var(--google-blue-700);\n  --primary-button-fill-color: var(--google-blue-600);\n  --primary-button-text-color: #fff;\n  --quiet-background-color: rgb(247, 247, 247);\n  --secondary-button-border-color: var(--google-gray-500);\n  --secondary-button-fill-color: #fff;\n  --secondary-button-hover-border-color: var(--google-gray-600);\n  --secondary-button-hover-fill-color: var(--google-gray-50);\n  --secondary-button-text-color: var(--google-gray-700);\n  --small-link-color: var(--google-gray-700);\n  --text-color: var(--google-gray-700);\n  background: var(--background-color);\n  color: var(--text-color);\n  word-wrap: break-word;\n}\n\n.nav-wrapper .secondary-button {\n  background: var(--secondary-button-fill-color);\n  border: 1px solid var(--secondary-button-border-color);\n  color: var(--secondary-button-text-color);\n  float: none;\n  margin: 0;\n  padding: 8px 16px;\n}\n\n.hidden {\n  display: none;\n}\n\nhtml {\n  -webkit-text-size-adjust: 100%;\n  font-size: 125%;\n}\n\n.icon {\n  background-repeat: no-repeat;\n  background-size: 100%;\n}\n\n@media (prefers-color-scheme: dark) {\n  body {\n    --background-color: var(--google-gray-900);\n    --error-code-color: var(--google-gray-500);\n    --heading-color: var(--google-gray-500);\n    --link-color: var(--google-blue-300);\n    --primary-button-fill-color-active: rgb(129, 162, 208);\n    --primary-button-fill-color: var(--google-blue-300);\n    --primary-button-text-color: var(--google-gray-900);\n    --quiet-background-color: var(--background-color);\n    --secondary-button-border-color: var(--google-gray-700);\n    --secondary-button-fill-color: var(--google-gray-900);\n    --secondary-button-hover-fill-color: rgb(48, 51, 57);\n    --secondary-button-text-color: var(--google-blue-300);\n    --small-link-color: var(--google-blue-300);\n    --text-color: var(--google-gray-500);\n  }\n}\n</style>\n  <style>/* Copyright 2014 The Chromium Authors\n   Use of this source code is governed by a BSD-style license that can be\n   found in the LICENSE file. */\n\nbutton {\n  border: 0;\n  border-radius: 20px;\n  box-sizing: border-box;\n  color: var(--primary-button-text-color);\n  cursor: pointer;\n  float: right;\n  font-size: .875em;\n  margin: 0;\n  padding: 8px 16px;\n  transition: box-shadow 150ms cubic-bezier(0.4, 0, 0.2, 1);\n  user-select: none;\n}\n\n[dir='rtl'] button {\n  float: left;\n}\n\n.bad-clock button,\n.captive-portal button,\n.https-only button,\n.insecure-form button,\n.lookalike-url button,\n.main-frame-blocked button,\n.neterror button,\n.pdf button,\n.ssl button,\n.enterprise-block button,\n.enterprise-warn button,\n.managed-profile-required button,\n.safe-browsing-billing button,\n.supervised-user-verify button,\n.supervised-user-verify-subframe button {\n  background: var(--primary-button-fill-color);\n}\n\nbutton:active {\n  background: var(--primary-button-fill-color-active);\n  outline: 0;\n}\n\n#debugging {\n  display: inline;\n  overflow: auto;\n}\n\n.debugging-content {\n  line-height: 1em;\n  margin-bottom: 0;\n  margin-top: 1em;\n}\n\n.debugging-content-fixed-width {\n  display: block;\n  font-family: monospace;\n  font-size: 1.2em;\n  margin-top: 0.5em;\n}\n\n.debugging-title {\n  font-weight: bold;\n}\n\n#details {\n  margin: 0 0 50px;\n}\n\n#details p:not(:first-of-type) {\n  margin-top: 20px;\n}\n\n.secondary-button:active {\n  border-color: white;\n  box-shadow: 0 1px 2px 0 rgba(60, 64, 67, .3),\n      0 2px 6px 2px rgba(60, 64, 67, .15);\n}\n\n.secondary-button:hover {\n  background: var(--secondary-button-hover-fill-color);\n  border-color: var(--secondary-button-hover-border-color);\n  text-decoration: none;\n}\n\n.error-code {\n  color: var(--error-code-color);\n  font-size: .8em;\n  margin-top: 12px;\n  text-transform: uppercase;\n}\n\n#error-debugging-info {\n  font-size: 0.8em;\n}\n\nh1 {\n  color: var(--heading-color);\n  font-size: 1.6em;\n  font-weight: normal;\n  line-height: 1.25em;\n  margin-bottom: 16px;\n}\n\nh2 {\n  font-size: 1.2em;\n  font-weight: normal;\n}\n\n.icon {\n  height: 72px;\n  margin: 0 0 40px;\n  width: 72px;\n}\n\ninput[type=checkbox] {\n  opacity: 0;\n}\n\ninput[type=checkbox]:focus ~ .checkbox::after {\n  outline: -webkit-focus-ring-color auto 5px;\n}\n\n.interstitial-wrapper {\n  box-sizing: border-box;\n  font-size: 1em;\n  line-height: 1.6em;\n  margin: 14vh auto 0;\n  max-width: 600px;\n  width: 100%;\n}\n\n#main-message > p {\n  display: inline;\n}\n\n#extended-reporting-opt-in {\n  font-size: .875em;\n  margin-top: 32px;\n}\n\n#extended-reporting-opt-in label {\n  display: grid;\n  grid-template-columns: 1.8em 1fr;\n  position: relative;\n}\n\n#enhanced-protection-message {\n  border-radius: 20px;\n  font-size: 1em;\n  margin-top: 32px;\n  padding: 10px 5px;\n}\n\n#enhanced-protection-message a {\n  color: var(--google-red-10);\n}\n\n#enhanced-protection-message label {\n  display: grid;\n  grid-template-columns: 2.5em 1fr;\n  position: relative;\n}\n\n#enhanced-protection-message div {\n  margin: 0.5em;\n}\n\n#enhanced-protection-message .icon {\n  height: 1.5em;\n  vertical-align: middle;\n  width: 1.5em;\n}\n\n.nav-wrapper {\n  margin-top: 51px;\n}\n\n.nav-wrapper::after {\n  clear: both;\n  content: '';\n  display: table;\n  width: 100%;\n}\n\n.small-link {\n  color: var(--small-link-color);\n  font-size: .875em;\n}\n\n.checkboxes {\n  flex: 0 0 24px;\n}\n\n.checkbox {\n  --padding: .9em;\n  background: transparent;\n  display: block;\n  height: 1em;\n  left: -1em;\n  padding-inline-start: var(--padding);\n  position: absolute;\n  right: 0;\n  top: -.5em;\n  width: 1em;\n}\n\n.checkbox::after {\n  border: 1px solid white;\n  border-radius: 2px;\n  content: '';\n  height: 1em;\n  left: var(--padding);\n  position: absolute;\n  top: var(--padding);\n  width: 1em;\n}\n\n.checkbox::before {\n  background: transparent;\n  border: 2px solid white;\n  border-inline-end-width: 0;\n  border-top-width: 0;\n  content: '';\n  height: .2em;\n  left: calc(.3em + var(--padding));\n  opacity: 0;\n  position: absolute;\n  top: calc(.3em  + var(--padding));\n  transform: rotate(-45deg);\n  width: .5em;\n}\n\ninput[type=checkbox]:checked ~ .checkbox::before {\n  opacity: 1;\n}\n\n#recurrent-error-message {\n  background: #ededed;\n  border-radius: 4px;\n  margin-bottom: 16px;\n  margin-top: 12px;\n  padding: 12px 16px;\n}\n\n.showing-recurrent-error-message #extended-reporting-opt-in {\n  margin-top: 16px;\n}\n\n.showing-recurrent-error-message #enhanced-protection-message {\n  margin-top: 16px;\n}\n\n@media (max-width: 700px) {\n  .interstitial-wrapper {\n    padding: 0 10%;\n  }\n\n  #error-debugging-info {\n    overflow: auto;\n  }\n}\n\n@media (max-width: 420px) {\n  button,\n  [dir='rtl'] button,\n  .small-link {\n    float: none;\n    font-size: .825em;\n    font-weight: 500;\n    margin: 0;\n    width: 100%;\n  }\n\n  button {\n    padding: 16px 24px;\n  }\n\n  #details {\n    margin: 20px 0 20px 0;\n  }\n\n  #details p:not(:first-of-type) {\n    margin-top: 10px;\n  }\n\n  .secondary-button:not(.hidden) {\n    display: block;\n    margin-top: 20px;\n    text-align: center;\n    width: 100%;\n  }\n\n  .interstitial-wrapper {\n    padding: 0 5%;\n  }\n\n  #extended-reporting-opt-in {\n    margin-top: 24px;\n  }\n\n  #enhanced-protection-message {\n    margin-top: 24px;\n  }\n\n  .nav-wrapper {\n    margin-top: 30px;\n  }\n}\n\n/**\n * Mobile specific styling.\n * Navigation buttons are anchored to the bottom of the screen.\n * Details message replaces the top content in its own scrollable area.\n */\n\n@media (max-width: 420px) {\n  .nav-wrapper .secondary-button {\n    border: 0;\n    margin: 16px 0 0;\n    margin-inline-end: 0;\n    padding-bottom: 16px;\n    padding-top: 16px;\n  }\n}\n\n/* Fixed nav. */\n@media (min-width: 240px) and (max-width: 420px) and\n       (min-height: 401px),\n       (min-width: 421px) and (min-height: 240px) and\n       (max-height: 560px) {\n  body .nav-wrapper {\n    background: var(--background-color);\n    bottom: 0;\n    box-shadow: 0 -12px 24px var(--background-color);\n    left: 0;\n    margin: 0 auto;\n    max-width: 736px;\n    padding-inline-end: 24px;\n    padding-inline-start: 24px;\n    position: fixed;\n    right: 0;\n    width: 100%;\n    z-index: 2;\n  }\n\n  .interstitial-wrapper {\n    max-width: 736px;\n  }\n\n  #details,\n  #main-content {\n    padding-bottom: 40px;\n  }\n\n  #details {\n    padding-top: 5.5vh;\n  }\n\n  button.small-link {\n    color: var(--google-blue-600);\n  }\n}\n\n@media (max-width: 420px) and (orientation: portrait),\n       (max-height: 560px) {\n  body {\n    margin: 0 auto;\n  }\n\n  button,\n  [dir='rtl'] button,\n  button.small-link,\n  .nav-wrapper .secondary-button {\n    font-family: Roboto-Regular,Helvetica;\n    font-size: .933em;\n    margin: 6px 0;\n    transform: translatez(0);\n  }\n\n  .nav-wrapper {\n    box-sizing: border-box;\n    padding-bottom: 8px;\n    width: 100%;\n  }\n\n  #details {\n    box-sizing: border-box;\n    height: auto;\n    margin: 0;\n    opacity: 1;\n    transition: opacity 250ms cubic-bezier(0.4, 0, 0.2, 1);\n  }\n\n  #details.hidden,\n  #main-content.hidden {\n    height: 0;\n    opacity: 0;\n    overflow: hidden;\n    padding-bottom: 0;\n    transition: none;\n  }\n\n  h1 {\n    font-size: 1.5em;\n    margin-bottom: 8px;\n  }\n\n  .icon {\n    margin-bottom: 5.69vh;\n  }\n\n  .interstitial-wrapper {\n    box-sizing: border-box;\n    margin: 7vh auto 12px;\n    padding: 0 24px;\n    position: relative;\n  }\n\n  .interstitial-wrapper p {\n    font-size: .95em;\n    line-height: 1.61em;\n    margin-top: 8px;\n  }\n\n  #main-content {\n    margin: 0;\n    transition: opacity 100ms cubic-bezier(0.4, 0, 0.2, 1);\n  }\n\n  .small-link {\n    border: 0;\n  }\n\n  .suggested-left > #control-buttons,\n  .suggested-right > #control-buttons {\n    float: none;\n    margin: 0;\n  }\n}\n\n@media (min-width: 421px) and (min-height: 500px) and (max-height: 560px) {\n  .interstitial-wrapper {\n    margin-top: 10vh;\n  }\n}\n\n@media (min-height: 400px) and (orientation:portrait) {\n  .interstitial-wrapper {\n    margin-bottom: 145px;\n  }\n}\n\n@media (min-height: 299px) {\n  .nav-wrapper {\n    padding-bottom: 16px;\n  }\n}\n\n@media (max-height: 560px) and (min-height: 240px) and (orientation:landscape) {\n  .extended-reporting-has-checkbox #details {\n    padding-bottom: 80px;\n  }\n}\n\n@media (min-height: 500px) and (max-height: 650px) and (max-width: 414px) and\n       (orientation: portrait) {\n  .interstitial-wrapper {\n    margin-top: 7vh;\n  }\n}\n\n@media (min-height: 650px) and (max-width: 414px) and (orientation: portrait) {\n  .interstitial-wrapper {\n    margin-top: 10vh;\n  }\n}\n\n/* Small mobile screens. No fixed nav. */\n@media (max-height: 400px) and (orientation: portrait),\n       (max-height: 239px) and (orientation: landscape),\n       (max-width: 419px) and (max-height: 399px) {\n  .interstitial-wrapper {\n    display: flex;\n    flex-direction: column;\n    margin-bottom: 0;\n  }\n\n  #details {\n    flex: 1 1 auto;\n    order: 0;\n  }\n\n  #main-content {\n    flex: 1 1 auto;\n    order: 0;\n  }\n\n  .nav-wrapper {\n    flex: 0 1 auto;\n    margin-top: 8px;\n    order: 1;\n    padding-inline-end: 0;\n    padding-inline-start: 0;\n    position: relative;\n    width: 100%;\n  }\n\n  button,\n  .nav-wrapper .secondary-button {\n    padding: 16px 24px;\n  }\n\n  button.small-link {\n    color: var(--google-blue-600);\n  }\n}\n\n@media (max-width: 239px) and (orientation: portrait) {\n  .nav-wrapper {\n    padding-inline-end: 0;\n    padding-inline-start: 0;\n  }\n}\n</style>\n  <style>/* Copyright 2013 The Chromium Authors\n * Use of this source code is governed by a BSD-style license that can be\n * found in the LICENSE file. */\n\n/* Don't use the main frame div when the error is in a subframe. */\nhtml[subframe] #main-frame-error {\n  display: none;\n}\n\n/* Don't use the subframe error div when the error is in a main frame. */\nhtml:not([subframe]) #sub-frame-error {\n  display: none;\n}\n\nh1 {\n  margin-top: 0;\n  word-wrap: break-word;\n}\n\nh1 span {\n  font-weight: 500;\n}\n\na {\n  text-decoration: none;\n}\n\n.icon {\n  -webkit-user-select: none;\n  display: inline-block;\n}\n\n.icon-generic {\n  /* Can't access chrome://theme/IDR_ERROR_NETWORK_GENERIC from an untrusted\n   * renderer process, so embed the resource manually. */\n  content: image-set(\n      url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABIAQMAAABvIyEEAAAABlBMVEUAAABTU1OoaSf/AAAAAXRSTlMAQObYZgAAAENJREFUeF7tzbEJACEQRNGBLeAasBCza2lLEGx0CxFGG9hBMDDxRy/72O9FMnIFapGylsu1fgoBdkXfUHLrQgdfrlJN1BdYBjQQm3UAAAAASUVORK5CYII=) 1x,\n      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2x);\n}\n\n.icon-offline {\n  content: image-set(\n      url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABIAQMAAABvIyEEAAAABlBMVEUAAABTU1OoaSf/AAAAAXRSTlMAQObYZgAAAGxJREFUeF7tyMEJwkAQRuFf5ipMKxYQiJ3Z2nSwrWwBA0+DQZcdxEOueaePp9+dQZFB7GpUcURSVU66yVNFj6LFICatThZB6r/ko/pbRpUgilY0Cbw5sNmb9txGXUKyuH7eV25x39DtJXUNPQGJtWFV+BT/QAAAAABJRU5ErkJggg==) 1x,\n      url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAJAAAACQBAMAAAAVaP+LAAAAGFBMVEUAAABTU1NNTU1TU1NPT09SUlJSUlJTU1O8B7DEAAAAB3RSTlMAoArVKvVgBuEdKgAAAJ1JREFUeF7t1TEOwyAMQNG0Q6/UE+RMXD9d/tC6womIFSL9P+MnAYOXeTIzMzMzMzMzaz8J9Ri6HoITmuHXhISE8nEh9yxDh55aCEUoTGbbQwjqHwIkRAEiIaG0+0AA9VBMaE89Rogeoww936MQrWdBr4GN/z0IAdQ6nQ/FIpRXDwHcA+JIJcQowQAlFUA0MfQpXLlVQfkzR4igS6ENjknm/wiaGhsAAAAASUVORK5CYII=) 2x);\n  position: relative;\n}\n\n.icon-disabled {\n  content: image-set(\n      url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHAAAABICAMAAAAZF4G5AAAABlBMVEVMaXFTU1OXUj8tAAAAAXRSTlMAQObYZgAAASZJREFUeAHd11Fq7jAMRGGf/W/6PoWB67YMqv5DybwG/CFjRuR8JBw3+ByiRjgV9W/TJ31P0tBfC6+cj1haUFXKHmVJo5wP98WwQ0ZCbfUc6LQ6VuUBz31ikADkLMkDrfUC4rR6QGW+gF6rx7NaHWCj1Y/W6lf4L7utvgBSt3rBFSS/XBMPUILcJINHCBWYUfpWn4NBi1ZfudIc3rf6/NGEvEA+AsYTJozmXemjXeLZAov+mnkN2HfzXpMSVQDnGw++57qNJ4D1xitA2sJ+VAWMygSEaYf2mYPTjZfk2K8wmP7HLIH5Mg4/pP+PEcDzUvDMvYbs/2NWwPO5vBdMZE4EE5UTQLiBFDaUlTDPBRoJ9HdAYIkIo06og3BNXtCzy7zA1aXk5x+tJARq63eAygAAAABJRU5ErkJggg==) 1x,\n      url(data:image/png;base64,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) 2x);\n  width: 112px;\n}\n\n.hidden {\n  display: none;\n}\n\n#suggestions-list a {\n  color: var(--google-blue-600);\n}\n\n#suggestions-list p {\n  margin-block-end: 0;\n}\n\n#suggestions-list ul {\n  margin-top: 0;\n}\n\n.single-suggestion {\n  list-style-type: none;\n  padding-inline-start: 0;\n}\n\n.link-button {\n  color: rgb(66, 133, 244);\n  display: inline-block;\n  font-weight: bold;\n  text-transform: uppercase;\n}\n\n#sub-frame-error-details {\n\n  color: #8F8F8F;\n\n  /* Not done on mobile for performance reasons. */\n  text-shadow: 0 1px 0 rgba(255,255,255,0.3);\n\n}\n\n.secondary-button {\n  background: #d9d9d9;\n  color: #696969;\n  margin-inline-end: 16px;\n}\n\n.snackbar {\n  background: #323232;\n  border-radius: 2px;\n  bottom: 24px;\n  box-sizing: border-box;\n  color: #fff;\n  font-size: .87em;\n  left: 24px;\n  max-width: 568px;\n  min-width: 288px;\n  opacity: 0;\n  padding: 16px 24px 12px;\n  position: fixed;\n  transform: translateY(90px);\n  will-change: opacity, transform;\n  z-index: 999;\n}\n\n.snackbar-show {\n  -webkit-animation:\n    show-snackbar 250ms cubic-bezier(0, 0, 0.2, 1) forwards,\n    hide-snackbar 250ms cubic-bezier(0.4, 0, 1, 1) forwards 5s;\n}\n\n@-webkit-keyframes show-snackbar {\n  100% {\n    opacity: 1;\n    transform: translateY(0);\n  }\n}\n\n@-webkit-keyframes hide-snackbar {\n  0% {\n    opacity: 1;\n    transform: translateY(0);\n  }\n  100% {\n    opacity: 0;\n    transform: translateY(90px);\n  }\n}\n\n.suggestions {\n  margin-top: 18px;\n}\n\n.suggestion-header {\n  font-weight: bold;\n  margin-bottom: 4px;\n}\n\n.suggestion-body {\n  color: #777;\n}\n\n/* Decrease padding at low sizes. */\n@media (max-width: 640px), (max-height: 640px) {\n  h1 {\n    margin: 0 0 15px;\n  }\n  .suggestions {\n    margin-top: 10px;\n  }\n  .suggestion-header {\n    margin-bottom: 0;\n  }\n}\n\n#cancel-save-page-button {\n  background-image: url(data:image/svg+xml;base64,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);\n  background-position: right 27px center;\n  background-repeat: no-repeat;\n  border: 1px solid var(--google-gray-300);\n  border-radius: 5px;\n  color: var(--google-gray-700);\n  margin-bottom: 26px;\n  padding-bottom: 16px;\n  padding-inline-end: 88px;\n  padding-inline-start: 16px;\n  padding-top: 16px;\n  text-align: start;\n}\n\nhtml[dir='rtl'] #cancel-save-page-button {\n  background-position: left 27px center;\n}\n\n#save-page-for-later-button {\n  display: flex;\n  justify-content: start;\n}\n\n#save-page-for-later-button a::before {\n  content: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxLjJlbSIgaGVpZ2h0PSIxLjJlbSIgdmlld0JveD0iMCAwIDI0IDI0Ij48cGF0aCBkPSJNNSAyMGgxNHYtMkg1bTE0LTloLTRWM0g5djZINWw3IDcgNy03eiIgZmlsbD0iIzQyODVGNCIvPjwvc3ZnPg==);\n  display: inline-block;\n  margin-inline-end: 4px;\n  vertical-align: -webkit-baseline-middle;\n}\n\n.hidden#save-page-for-later-button {\n  display: none;\n}\n\n/* Don't allow overflow when in a subframe. */\nhtml[subframe] body {\n  overflow: hidden;\n}\n\n#sub-frame-error {\n  -webkit-align-items: center;\n  -webkit-flex-flow: column;\n  -webkit-justify-content: center;\n  background-color: #DDD;\n  display: -webkit-flex;\n  height: 100%;\n  left: 0;\n  position: absolute;\n  text-align: center;\n  top: 0;\n  transition: background-color 200ms ease-in-out;\n  width: 100%;\n}\n\n#sub-frame-error:hover {\n  background-color: #EEE;\n}\n\n#sub-frame-error .icon-generic {\n  margin: 0 0 16px;\n}\n\n#sub-frame-error-details {\n  margin: 0 10px;\n  text-align: center;\n  opacity: 0;\n}\n\n/* Show details only when hovering. */\n#sub-frame-error:hover #sub-frame-error-details {\n  opacity: 1;\n}\n\n/* If the iframe is too small, always hide the error code. */\n/* TODO(mmenke): See if overflow: no-display works better, once supported. */\n@media (max-width: 200px), (max-height: 95px) {\n  #sub-frame-error-details {\n    display: none;\n  }\n}\n\n/* Adjust icon for small embedded frames in apps. */\n@media (max-height: 100px) {\n  #sub-frame-error .icon-generic {\n    height: auto;\n    margin: 0;\n    padding-top: 0;\n    width: 25px;\n  }\n}\n\n/* details-button is special; it's a <button> element that looks like a link. */\n#details-button {\n  box-shadow: none;\n  min-width: 0;\n}\n\n/* Styles for platform dependent separation of controls and details button. */\n.suggested-left > #control-buttons,\n.suggested-right > #details-button {\n  float: left;\n}\n\n.suggested-right > #control-buttons,\n.suggested-left > #details-button {\n  float: right;\n}\n\n.suggested-left .secondary-button {\n  margin-inline-end: 0;\n  margin-inline-start: 16px;\n}\n\n#details-button.singular {\n  float: none;\n}\n\n/* download-button shows both icon and text. */\n#download-button {\n  padding-bottom: 4px;\n  padding-top: 4px;\n  position: relative;\n}\n\n#download-button::before {\n  background: image-set(\n      url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAQAAABKfvVzAAAAO0lEQVQ4y2NgGArgPxIY1YChsOE/LtBAmpYG0mxpIOSDBpKUo2lpIDZxNJCkHKqlYZAla3RAHQ1DFgAARRroHyLNTwwAAAAASUVORK5CYII=) 1x,\n      url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAQAAAD9CzEMAAAAZElEQVRYw+3Ruw3AMAwDUY3OzZUmRRD4E9iim9wNwAdbEURHyk4AAAAATiCVK8lLyPsKeT9K3lsownnunfkPxO78hKiYHxBV8x2icr5BVM+/CMf8g3DN34Rzns6ViwHUAUQ/6wIAd5Km7l6c8AAAAABJRU5ErkJggg==) 2x)\n    no-repeat;\n  content: '';\n  display: inline-block;\n  height: 24px;\n  margin-inline-end: 4px;\n  margin-inline-start: -4px;\n  vertical-align: middle;\n  width: 24px;\n}\n\n#download-button:disabled {\n  background: rgb(180, 206, 249);\n  color: rgb(255, 255, 255);\n}\n\n#buttons::after {\n  clear: both;\n  content: '';\n  display: block;\n  width: 100%;\n}\n\n/* Offline page */\nhtml[dir='rtl'] .runner-container,\nhtml[dir='rtl'].offline .icon-offline {\n  transform: scaleX(-1);\n}\n\n.offline {\n  transition: filter 1.5s cubic-bezier(0.65, 0.05, 0.36, 1),\n              background-color 1.5s cubic-bezier(0.65, 0.05, 0.36, 1);\n\n  will-change: filter, background-color;\n\n}\n\n.offline body {\n  transition: background-color 1.5s cubic-bezier(0.65, 0.05, 0.36, 1);\n}\n\n.offline #main-message > p {\n  display: none;\n}\n\n.offline.inverted {\n  background-color: #fff;\n  filter: invert(1);\n}\n\n.offline.inverted body {\n  background-color: #fff;\n}\n\n.offline .interstitial-wrapper {\n  color: var(--text-color);\n  font-size: 1em;\n  line-height: 1.55;\n  margin: 0 auto;\n  max-width: 600px;\n  padding-top: 100px;\n  position: relative;\n  width: 100%;\n}\n\n.offline .runner-container {\n  direction: ltr;\n  height: 150px;\n  max-width: 600px;\n  overflow: hidden;\n  position: absolute;\n  top: 35px;\n  width: 44px;\n}\n\n.offline .runner-container:focus {\n  outline: none;\n}\n\n.offline .runner-container:focus-visible {\n  outline: 3px solid var(--google-blue-300);\n}\n\n.offline .runner-canvas {\n  height: 150px;\n  max-width: 600px;\n  opacity: 1;\n  overflow: hidden;\n  position: absolute;\n  top: 0;\n  z-index: 10;\n}\n\n.offline .controller {\n  height: 100vh;\n  left: 0;\n  position: absolute;\n  top: 0;\n  width: 100vw;\n  z-index: 9;\n}\n\n#offline-resources {\n  display: none;\n}\n\n#offline-instruction {\n  image-rendering: pixelated;\n  left: 0;\n  margin: auto;\n  position: absolute;\n  right: 0;\n  top: 60px;\n  width: fit-content;\n}\n\n.offline-runner-live-region {\n  bottom: 0;\n  clip-path: polygon(0 0, 0 0, 0 0);\n  color: var(--background-color);\n  display: block;\n  font-size: xx-small;\n  overflow: hidden;\n  position: absolute;\n  text-align: center;\n  transition: color 1.5s cubic-bezier(0.65, 0.05, 0.36, 1);\n  user-select: none;\n}\n\n/* Custom toggle */\n.slow-speed-option {\n  align-items: center;\n  background: var(--google-gray-50);\n  border-radius: 24px/50%;\n  bottom: 0;\n  color: var(--error-code-color);\n  display: inline-flex;\n  font-size: 1em;\n  left: 0;\n  line-height: 1.1em;\n  margin: 5px auto;\n  padding: 2px 12px 3px 20px;\n  position: absolute;\n  right: 0;\n  width: max-content;\n  z-index: 999;\n}\n\n.slow-speed-option.hidden {\n  display: none;\n}\n\n.slow-speed-option [type=checkbox] {\n  opacity: 0;\n  pointer-events: none;\n  position: absolute;\n}\n\n.slow-speed-option .slow-speed-toggle {\n  cursor: pointer;\n  margin-inline-start: 8px;\n  padding: 8px 4px;\n  position: relative;\n}\n\n.slow-speed-option [type=checkbox]:disabled ~ .slow-speed-toggle {\n  cursor: default;\n}\n\n.slow-speed-option-label [type=checkbox] {\n  opacity: 0;\n  pointer-events: none;\n  position: absolute;\n}\n\n.slow-speed-option .slow-speed-toggle::before,\n.slow-speed-option .slow-speed-toggle::after {\n  content: '';\n  display: block;\n  margin: 0 3px;\n  transition: all 100ms cubic-bezier(0.4, 0, 1, 1);\n}\n\n.slow-speed-option .slow-speed-toggle::before {\n  background: rgb(189,193,198);\n  border-radius: 0.65em;\n  height: 0.9em;\n  width: 2em;\n}\n\n.slow-speed-option .slow-speed-toggle::after {\n  background: #fff;\n  border-radius: 50%;\n  box-shadow: 0 1px 3px 0 rgb(0 0 0 / 40%);\n  height: 1.2em;\n  position: absolute;\n  top: 51%;\n  transform: translate(-20%, -50%);\n  width: 1.1em;\n}\n\n.slow-speed-option [type=checkbox]:focus + .slow-speed-toggle {\n  box-shadow: 0 0 8px rgb(94, 158, 214);\n  outline: 1px solid rgb(93, 157, 213);\n}\n\n.slow-speed-option [type=checkbox]:checked + .slow-speed-toggle::before {\n  background: var(--google-blue-600);\n  opacity: 0.5;\n}\n\n.slow-speed-option [type=checkbox]:checked + .slow-speed-toggle::after {\n  background: var(--google-blue-600);\n  transform: translate(calc(2em - 90%), -50%);\n}\n\n.slow-speed-option [type=checkbox]:checked:disabled +\n  .slow-speed-toggle::before {\n  background: rgb(189,193,198);\n}\n\n.slow-speed-option [type=checkbox]:checked:disabled +\n  .slow-speed-toggle::after {\n  background: var(--google-gray-50);\n}\n\n@media (max-width: 420px) {\n  #download-button {\n    padding-bottom: 12px;\n    padding-top: 12px;\n  }\n\n  .suggested-left > #control-buttons,\n  .suggested-right > #control-buttons {\n    float: none;\n  }\n\n  .snackbar {\n    border-radius: 0;\n    bottom: 0;\n    left: 0;\n    width: 100%;\n  }\n}\n\n@media (max-height: 350px) {\n  h1 {\n    margin: 0 0 15px;\n  }\n\n  .icon-offline {\n    margin: 0 0 10px;\n  }\n\n  .interstitial-wrapper {\n    margin-top: 5%;\n  }\n\n  .nav-wrapper {\n    margin-top: 30px;\n  }\n}\n\n@media (min-width: 420px) and (max-width: 736px) and\n       (min-height: 240px) and (max-height: 420px) and\n       (orientation:landscape) {\n  .interstitial-wrapper {\n    margin-bottom: 100px;\n  }\n}\n\n@media (max-width: 360px) and (max-height: 480px) {\n  .offline .interstitial-wrapper {\n    padding-top: 60px;\n  }\n\n  .offline .runner-container {\n    top: 8px;\n  }\n}\n\n@media (min-height: 240px) and (orientation: landscape) {\n  .offline .interstitial-wrapper {\n    margin-bottom: 90px;\n  }\n\n  .icon-offline {\n    margin-bottom: 20px;\n  }\n}\n\n@media (max-height: 320px) and (orientation: landscape) {\n  .icon-offline {\n    margin-bottom: 0;\n  }\n\n  .offline .runner-container {\n    top: 10px;\n  }\n}\n\n@media (max-width: 240px) {\n  button {\n    padding-inline-end: 12px;\n    padding-inline-start: 12px;\n  }\n\n  .interstitial-wrapper {\n    overflow: inherit;\n    padding: 0 8px;\n  }\n}\n\n@media (max-width: 120px) {\n  button {\n    width: auto;\n  }\n}\n\n.arcade-mode,\n.arcade-mode .runner-container,\n.arcade-mode .runner-canvas {\n  image-rendering: pixelated;\n  max-width: 100%;\n  overflow: hidden;\n}\n\n.arcade-mode #buttons,\n.arcade-mode #main-content {\n  opacity: 0;\n  overflow: hidden;\n}\n\n.arcade-mode .interstitial-wrapper {\n  height: 100vh;\n  max-width: 100%;\n  overflow: hidden;\n}\n\n.arcade-mode .runner-container {\n  left: 0;\n  margin: auto;\n  right: 0;\n  transform-origin: top center;\n  transition: transform 250ms cubic-bezier(0.4, 0, 1, 1) 400ms;\n  z-index: 2;\n}\n\n@media (prefers-color-scheme: dark) {\n  .icon {\n    filter: invert(1);\n  }\n\n  .offline .runner-canvas {\n    filter: invert(1);\n  }\n\n  .offline.inverted {\n    background-color: var(--background-color);\n    filter: invert(0);\n  }\n\n  .offline.inverted body {\n    background-color: #fff;\n  }\n\n  .offline.inverted .offline-runner-live-region {\n    color: #fff;\n  }\n\n  #suggestions-list a {\n    color: var(--link-color);\n  }\n\n  .slow-speed-option {\n    background: var(--google-gray-800);\n    color: var(--google-gray-100);\n  }\n\n  .slow-speed-option .slow-speed-toggle::before,\n  .slow-speed-option [type=checkbox]:checked:disabled +\n    .slow-speed-toggle::before {\n     background: rgb(189,193,198);\n  }\n\n  .slow-speed-option [type=checkbox]:checked + .slow-speed-toggle::after,\n  .slow-speed-option [type=checkbox]:checked + .slow-speed-toggle::before {\n    background: var(--google-blue-300);\n  }\n}\n\n#main-frame-error:not(.showing-details) #details {\n  display: none;\n}\n\n@media (min-width: 240px) and (max-width: 420px) and (min-height: 401px),\n       (min-height: 240px) and (max-height: 560px) and (min-width: 421px) {\n  #main-frame-error.showing-details #main-content,\n  #main-frame-error.showing-details .runner-container {\n    display: none;\n  }\n}\n</style>\n  <script>// Copyright 2022 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n/**\n * Verify |value| is truthy.\n * @param value A value to check for truthiness. Note that this\n *     may be used to test whether |value| is defined or not, and we don't want\n *     to force a cast to boolean.\n */\nfunction assert(value, message) {\n    if (value) {\n        return;\n    }\n    throw new Error('Assertion failed' + (message ? `: ${message}` : ''));\n}\n\n// Copyright 2022 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n/**\n * @fileoverview This file defines a singleton which provides access to all data\n * that is available as soon as the page's resources are loaded (before DOM\n * content has finished loading). This data includes both localized strings and\n * any data that is important to have ready from a very early stage (e.g. things\n * that must be displayed right away).\n *\n * Note that loadTimeData is not guaranteed to be consistent between page\n * refreshes (https://crbug.com/740629) and should not contain values that might\n * change if the page is re-opened later.\n */\nclass LoadTimeData {\n    data_ = null;\n    /**\n     * Sets the backing object.\n     *\n     * Note that there is no getter for |data_| to discourage abuse of the form:\n     *\n     *     var value = loadTimeData.data()['key'];\n     */\n    set data(value) {\n        assert(!this.data_, 'Re-setting data.');\n        this.data_ = value;\n    }\n    /**\n     * @param id An ID of a value that might exist.\n     * @return True if |id| is a key in the dictionary.\n     */\n    valueExists(id) {\n        assert(this.data_, 'No data. Did you remember to include strings.js?');\n        return id in this.data_;\n    }\n    /**\n     * Fetches a value, expecting that it exists.\n     * @param id The key that identifies the desired value.\n     * @return The corresponding value.\n     */\n    getValue(id) {\n        assert(this.data_, 'No data. Did you remember to include strings.js?');\n        const value = this.data_[id];\n        assert(typeof value !== 'undefined', 'Could not find value for ' + id);\n        return value;\n    }\n    /**\n     * As above, but also makes sure that the value is a string.\n     * @param id The key that identifies the desired string.\n     * @return The corresponding string value.\n     */\n    getString(id) {\n        const value = this.getValue(id);\n        assert(typeof value === 'string', `[${value}] (${id}) is not a string`);\n        return value;\n    }\n    /**\n     * Returns a formatted localized string where $1 to $9 are replaced by the\n     * second to the tenth argument.\n     * @param id The ID of the string we want.\n     * @param args The extra values to include in the formatted output.\n     * @return The formatted string.\n     */\n    getStringF(id, ...args) {\n        const value = this.getString(id);\n        if (!value) {\n            return '';\n        }\n        return this.substituteString(value, ...args);\n    }\n    /**\n     * Returns a formatted localized string where $1 to $9 are replaced by the\n     * second to the tenth argument. Any standalone $ signs must be escaped as\n     * $$.\n     * @param label The label to substitute through. This is not an resource ID.\n     * @param args The extra values to include in the formatted output.\n     * @return The formatted string.\n     */\n    substituteString(label, ...args) {\n        return label.replace(/\\$(.|$|\\n)/g, function (m) {\n            assert(m.match(/\\$[$1-9]/), 'Unescaped $ found in localized string.');\n            if (m === '$$') {\n                return '$';\n            }\n            const substitute = args[Number(m[1]) - 1];\n            if (substitute === undefined || substitute === null) {\n                // Not all callers actually provide values for all substitutes. Return\n                // an empty value for this case.\n                return '';\n            }\n            return substitute.toString();\n        });\n    }\n    /**\n     * Returns a formatted string where $1 to $9 are replaced by the second to\n     * tenth argument, split apart into a list of pieces describing how the\n     * substitution was performed. Any standalone $ signs must be escaped as $$.\n     * @param label A localized string to substitute through.\n     *     This is not an resource ID.\n     * @param args The extra values to include in the formatted output.\n     * @return The formatted string pieces.\n     */\n    getSubstitutedStringPieces(label, ...args) {\n        // Split the string by separately matching all occurrences of $1-9 and of\n        // non $1-9 pieces.\n        const pieces = (label.match(/(\\$[1-9])|(([^$]|\\$([^1-9]|$))+)/g) ||\n            []).map(function (p) {\n            // Pieces that are not $1-9 should be returned after replacing $$\n            // with $.\n            if (!p.match(/^\\$[1-9]$/)) {\n                assert((p.match(/\\$/g) || []).length % 2 === 0, 'Unescaped $ found in localized string.');\n                return { value: p.replace(/\\$\\$/g, '$'), arg: null };\n            }\n            // Otherwise, return the substitution value.\n            const substitute = args[Number(p[1]) - 1];\n            if (substitute === undefined || substitute === null) {\n                // Not all callers actually provide values for all substitutes. Return\n                // an empty value for this case.\n                return { value: '', arg: p };\n            }\n            return { value: substitute.toString(), arg: p };\n        });\n        return pieces;\n    }\n    /**\n     * As above, but also makes sure that the value is a boolean.\n     * @param id The key that identifies the desired boolean.\n     * @return The corresponding boolean value.\n     */\n    getBoolean(id) {\n        const value = this.getValue(id);\n        assert(typeof value === 'boolean', `[${value}] (${id}) is not a boolean`);\n        return value;\n    }\n    /**\n     * As above, but also makes sure that the value is an integer.\n     * @param id The key that identifies the desired number.\n     * @return The corresponding number value.\n     */\n    getInteger(id) {\n        const value = this.getValue(id);\n        assert(typeof value === 'number', `[${value}] (${id}) is not a number`);\n        assert(value === Math.floor(value), 'Number isn\\'t integer: ' + value);\n        return value;\n    }\n    /**\n     * Override values in loadTimeData with the values found in |replacements|.\n     * @param replacements The dictionary object of keys to replace.\n     */\n    overrideValues(replacements) {\n        assert(typeof replacements === 'object', 'Replacements must be a dictionary object.');\n        assert(this.data_, 'Data must exist before being overridden');\n        for (const key in replacements) {\n            this.data_[key] = replacements[key];\n        }\n    }\n    /**\n     * Reset loadTimeData's data. Should only be used in tests.\n     * @param newData The data to restore to, when null restores to unset state.\n     */\n    resetForTesting(newData = null) {\n        this.data_ = newData;\n    }\n    /**\n     * @return Whether loadTimeData.data has been set.\n     */\n    isInitialized() {\n        return this.data_ !== null;\n    }\n}\nconst loadTimeData = new LoadTimeData();\n\n// Copyright 2022 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n/**\n * Alias for document.getElementById. Found elements must be HTMLElements.\n */\nfunction getRequiredElement(id) {\n    const el = document.querySelector(`#${id}`);\n    assert(el);\n    assert(el instanceof HTMLElement);\n    return el;\n}\n\n/**\n * @license\n * Copyright 2019 Google LLC\n * SPDX-License-Identifier: BSD-3-Clause\n */\nconst t$3=globalThis,e$3=t$3.ShadowRoot&&(void 0===t$3.ShadyCSS||t$3.ShadyCSS.nativeShadow)&&\"adoptedStyleSheets\"in Document.prototype&&\"replace\"in CSSStyleSheet.prototype,s$3=Symbol(),o$3=new WeakMap;let n$3=class n{constructor(t,e,o){if(this._$cssResult$=!0,o!==s$3)throw Error(\"CSSResult is not constructable. 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= /Android/.test(window.navigator.userAgent) || IS_IOS;\nconst IS_RTL = document.documentElement.dir === 'rtl';\n/**\n * Frames per second.\n * @const\n */\nconst FPS = 60;\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n/**\n * Get random number.\n * @param {number} min\n * @param {number} max\n */\nfunction getRandomNum(min, max) {\n    return Math.floor(Math.random() * (max - min + 1)) + min;\n}\n/**\n * Return the current timestamp.\n * @return {number}\n */\nfunction getTimeStamp() {\n    return IS_IOS ? new Date().getTime() : performance.now();\n}\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nclass DistanceMeter {\n    /**\n     * Handles displaying the distance meter.\n     * @param {!HTMLCanvasElement} canvas\n     * @param {Object} spritePos Image position in sprite.\n     * 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the distance meter to '00000'.\n     * @param {number} width Canvas width in px.\n     */\n    init(width) {\n        let maxDistanceStr = '';\n        this.calcXPos(width);\n        this.maxScore = this.maxScoreUnits;\n        for (let i = 0; i < this.maxScoreUnits; i++) {\n            this.draw(i, 0);\n            this.defaultString += '0';\n            maxDistanceStr += '9';\n        }\n        this.maxScore = parseInt(maxDistanceStr, 10);\n    }\n    /**\n     * Calculate the xPos in the canvas.\n     * @param {number} canvasWidth\n     */\n    calcXPos(canvasWidth) {\n        this.x = canvasWidth -\n            (DistanceMeter.dimensions.DEST_WIDTH * (this.maxScoreUnits + 1));\n    }\n    /**\n     * Draw a digit to canvas.\n     * @param {number} digitPos Position of the digit.\n     * @param {number} value Digit value 0-9.\n     * @param {boolean=} opt_highScore Whether drawing the high score.\n     */\n    draw(digitPos, value, opt_highScore) {\n        let sourceWidth = DistanceMeter.dimensions.WIDTH;\n        let sourceHeight = DistanceMeter.dimensions.HEIGHT;\n        let sourceX = DistanceMeter.dimensions.WIDTH * value;\n        let sourceY = 0;\n        const targetX = digitPos * DistanceMeter.dimensions.DEST_WIDTH;\n        const targetY = this.y;\n        const targetWidth = DistanceMeter.dimensions.WIDTH;\n        const targetHeight = DistanceMeter.dimensions.HEIGHT;\n        // For high DPI we 2x source values.\n        if (IS_HIDPI) {\n            sourceWidth *= 2;\n            sourceHeight *= 2;\n            sourceX *= 2;\n        }\n        sourceX += this.spritePos.x;\n        sourceY += this.spritePos.y;\n        this.canvasCtx.save();\n        if (IS_RTL) {\n            if (opt_highScore) {\n                this.canvasCtx.translate(this.canvasWidth -\n                    (DistanceMeter.dimensions.WIDTH * (this.maxScoreUnits + 3)), this.y);\n            }\n            else {\n                this.canvasCtx.translate(this.canvasWidth - DistanceMeter.dimensions.WIDTH, this.y);\n            }\n            this.canvasCtx.scale(-1, 1);\n        }\n        else {\n            const highScoreX = this.x - (this.maxScoreUnits * 2) * DistanceMeter.dimensions.WIDTH;\n            if (opt_highScore) {\n                this.canvasCtx.translate(highScoreX, this.y);\n            }\n            else {\n                this.canvasCtx.translate(this.x, this.y);\n            }\n        }\n        this.canvasCtx.drawImage(this.image, sourceX, sourceY, sourceWidth, sourceHeight, targetX, targetY, targetWidth, targetHeight);\n        this.canvasCtx.restore();\n    }\n    /**\n     * Covert pixel distance to a 'real' distance.\n     * @param {number} distance Pixel distance ran.\n     * @return {number} The 'real' distance ran.\n     */\n    getActualDistance(distance) {\n        return distance ? Math.round(distance * this.config.COEFFICIENT) : 0;\n    }\n    /**\n     * Update the distance meter.\n     * @param {number} distance\n     * @param {number} deltaTime\n     * @return {boolean} Whether the achievement sound fx should be played.\n     */\n    update(deltaTime, distance) {\n        let paint = true;\n        let playSound = false;\n        if (!this.achievement) {\n            distance = this.getActualDistance(distance);\n            // Score has gone beyond the initial digit count.\n            if (distance > this.maxScore &&\n                this.maxScoreUnits === this.config.MAX_DISTANCE_UNITS) {\n                this.maxScoreUnits++;\n                this.maxScore = parseInt(this.maxScore + '9', 10);\n            }\n            else {\n                this.distance = 0;\n            }\n            if (distance > 0) {\n                // Achievement unlocked.\n                if (distance % this.config.ACHIEVEMENT_DISTANCE === 0) {\n                    // Flash score and play sound.\n                    this.achievement = true;\n                    this.flashTimer = 0;\n                    playSound = true;\n                }\n                // Create a string representation of the distance with leading 0.\n                const distanceStr = (this.defaultString + distance).substr(-this.maxScoreUnits);\n                this.digits = distanceStr.split('');\n            }\n            else {\n                this.digits = this.defaultString.split('');\n            }\n        }\n        else {\n            // Control flashing of the score on reaching achievement.\n            if (this.flashIterations <= this.config.FLASH_ITERATIONS) {\n                this.flashTimer += deltaTime;\n                if (this.flashTimer < this.config.FLASH_DURATION) {\n                    paint = false;\n                }\n                else if (this.flashTimer > this.config.FLASH_DURATION * 2) {\n                    this.flashTimer = 0;\n                    this.flashIterations++;\n                }\n            }\n            else {\n                this.achievement = false;\n                this.flashIterations = 0;\n                this.flashTimer = 0;\n            }\n        }\n        // Draw the digits if not flashing.\n        if (paint) {\n            for (let i = this.digits.length - 1; i >= 0; i--) {\n                this.draw(i, parseInt(this.digits[i], 10));\n            }\n        }\n        this.drawHighScore();\n        return playSound;\n    }\n    /**\n     * Draw the high score.\n     */\n    drawHighScore() {\n        if (parseInt(this.highScore, 10) > 0) {\n            this.canvasCtx.save();\n            this.canvasCtx.globalAlpha = .8;\n            for (let i = this.highScore.length - 1; i >= 0; i--) {\n                this.draw(i, parseInt(this.highScore[i], 10), true);\n            }\n            this.canvasCtx.restore();\n        }\n    }\n    /**\n     * Set the highscore as a array string.\n     * Position of char in the sprite: H - 10, I - 11.\n     * @param {number} distance Distance ran in pixels.\n     */\n    setHighScore(distance) {\n        distance = this.getActualDistance(distance);\n        const highScoreStr = (this.defaultString + distance).substr(-this.maxScoreUnits);\n        this.highScore = ['10', '11', ''].concat(highScoreStr.split(''));\n    }\n    /**\n     * Whether a clicked is in the high score area.\n     * @param {Event} e Event object.\n     * @return {boolean} Whether the click was in the high score bounds.\n     */\n    hasClickedOnHighScore(e) {\n        let x = 0;\n        let y = 0;\n        if (e.touches) {\n            // Bounds for touch differ from pointer.\n            const canvasBounds = this.canvas.getBoundingClientRect();\n            x = e.touches[0].clientX - canvasBounds.left;\n            y = e.touches[0].clientY - canvasBounds.top;\n        }\n        else {\n            x = e.offsetX;\n            y = e.offsetY;\n        }\n        this.highScoreBounds = this.getHighScoreBounds();\n        return x >= this.highScoreBounds.x &&\n            x <= this.highScoreBounds.x + this.highScoreBounds.width &&\n            y >= this.highScoreBounds.y &&\n            y <= this.highScoreBounds.y + this.highScoreBounds.height;\n    }\n    /**\n     * Get the bounding box for the high score.\n     * @return {Object} Object with x, y, width and height properties.\n     */\n    getHighScoreBounds() {\n        return {\n            x: (this.x - (this.maxScoreUnits * 2) * DistanceMeter.dimensions.WIDTH) -\n                DistanceMeter.config.HIGH_SCORE_HIT_AREA_PADDING,\n            y: this.y,\n            width: DistanceMeter.dimensions.WIDTH * (this.highScore.length + 1) +\n                DistanceMeter.config.HIGH_SCORE_HIT_AREA_PADDING,\n            height: DistanceMeter.dimensions.HEIGHT +\n                (DistanceMeter.config.HIGH_SCORE_HIT_AREA_PADDING * 2),\n        };\n    }\n    /**\n     * Animate flashing the high score to indicate ready for resetting.\n     * The flashing stops following this.config.FLASH_ITERATIONS x 2 flashes.\n     */\n    flashHighScore() {\n        const now = getTimeStamp();\n        const deltaTime = now - (this.frameTimeStamp || now);\n        let paint = true;\n        this.frameTimeStamp = now;\n        // Reached the max number of flashes.\n        if (this.flashIterations > this.config.FLASH_ITERATIONS * 2) {\n            this.cancelHighScoreFlashing();\n            return;\n        }\n        this.flashTimer += deltaTime;\n        if (this.flashTimer < this.config.FLASH_DURATION) {\n            paint = false;\n        }\n        else if (this.flashTimer > this.config.FLASH_DURATION * 2) {\n            this.flashTimer = 0;\n            this.flashIterations++;\n        }\n        if (paint) {\n            this.drawHighScore();\n        }\n        else {\n            this.clearHighScoreBounds();\n        }\n        // Frame update.\n        this.flashingRafId = requestAnimationFrame(this.flashHighScore.bind(this));\n    }\n    /**\n     * Draw empty rectangle over high score.\n     */\n    clearHighScoreBounds() {\n        this.canvasCtx.save();\n        this.canvasCtx.fillStyle = '#fff';\n        this.canvasCtx.rect(this.highScoreBounds.x, this.highScoreBounds.y, this.highScoreBounds.width, this.highScoreBounds.height);\n        this.canvasCtx.fill();\n        this.canvasCtx.restore();\n    }\n    /**\n     * Starts the flashing of the high score.\n     */\n    startHighScoreFlashing() {\n        this.highScoreFlashing = true;\n        this.flashHighScore();\n    }\n    /**\n     * Whether high score is flashing.\n     * @return {boolean}\n     */\n    isHighScoreFlashing() {\n        return this.highScoreFlashing;\n    }\n    /**\n     * Stop flashing the high score.\n     */\n    cancelHighScoreFlashing() {\n        if (this.flashingRafId) {\n            cancelAnimationFrame(this.flashingRafId);\n        }\n        this.flashIterations = 0;\n        this.flashTimer = 0;\n        this.highScoreFlashing = false;\n        this.clearHighScoreBounds();\n        this.drawHighScore();\n    }\n    /**\n     * Clear the high score.\n     */\n    resetHighScore() {\n        this.setHighScore(0);\n        this.cancelHighScoreFlashing();\n    }\n    /**\n     * Reset the distance meter back to '00000'.\n     */\n    reset() {\n        this.update(0, 0);\n        this.achievement = false;\n    }\n}\n/**\n * @enum {number}\n */\nDistanceMeter.dimensions = {\n    WIDTH: 10,\n    HEIGHT: 13,\n    DEST_WIDTH: 11,\n};\n/**\n * Y positioning of the digits in the sprite sheet.\n * X position is always 0.\n * @type {Array<number>}\n */\nDistanceMeter.yPos = [0, 13, 27, 40, 53, 67, 80, 93, 107, 120];\n/**\n * Distance meter config.\n * @enum {number}\n */\nDistanceMeter.config = {\n    // Number of digits.\n    MAX_DISTANCE_UNITS: 5,\n    // Distance that causes achievement animation.\n    ACHIEVEMENT_DISTANCE: 100,\n    // Used for conversion from pixel distance to a scaled unit.\n    COEFFICIENT: 0.025,\n    // Flash duration in milliseconds.\n    FLASH_DURATION: 1000 / 4,\n    // Flash iterations for achievement animation.\n    FLASH_ITERATIONS: 3,\n    // Padding around the high score hit area.\n    HIGH_SCORE_HIT_AREA_PADDING: 4,\n};\n\n// Copyright 2021 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n/* @const\n * Add matching sprite definition and config to spriteDefinitionByType.\n */\nconst GAME_TYPE = ['altgame'];\n//******************************************************************************\n/**\n * Collision box object.\n * @param {number} x X position.\n * @param {number} y Y Position.\n * @param {number} w Width.\n * @param {number} h Height.\n * @constructor\n */\nfunction CollisionBox(x, y, w, h) {\n    this.x = x;\n    this.y = y;\n    this.width = w;\n    this.height = h;\n}\n/**\n * T-Rex runner sprite definitions.\n */\nconst spriteDefinitionByType = {\n    original: {\n        LDPI: {\n            BACKGROUND_EL: { x: 86, y: 2 },\n            CACTUS_LARGE: { x: 332, y: 2 },\n            CACTUS_SMALL: { x: 228, y: 2 },\n            OBSTACLE_2: { x: 332, y: 2 },\n            OBSTACLE: { x: 228, y: 2 },\n            CLOUD: { x: 86, y: 2 },\n            HORIZON: { x: 2, y: 54 },\n            MOON: { x: 484, y: 2 },\n            PTERODACTYL: { x: 134, y: 2 },\n            RESTART: { x: 2, y: 68 },\n            TEXT_SPRITE: { x: 655, y: 2 },\n            TREX: { x: 848, y: 2 },\n            STAR: { x: 645, y: 2 },\n            COLLECTABLE: { x: 0, y: 0 },\n            ALT_GAME_END: { x: 32, y: 0 },\n        },\n        HDPI: {\n            BACKGROUND_EL: { x: 166, y: 2 },\n            CACTUS_LARGE: { x: 652, y: 2 },\n            CACTUS_SMALL: { x: 446, y: 2 },\n            OBSTACLE_2: { x: 652, y: 2 },\n            OBSTACLE: { x: 446, y: 2 },\n            CLOUD: { x: 166, y: 2 },\n            HORIZON: { x: 2, y: 104 },\n            MOON: { x: 954, y: 2 },\n            PTERODACTYL: { x: 260, y: 2 },\n            RESTART: { x: 2, y: 130 },\n            TEXT_SPRITE: { x: 1294, y: 2 },\n            TREX: { x: 1678, y: 2 },\n            STAR: { x: 1276, y: 2 },\n            COLLECTABLE: { x: 0, y: 0 },\n            ALT_GAME_END: { x: 64, y: 0 },\n        },\n        MAX_GAP_COEFFICIENT: 1.5,\n        MAX_OBSTACLE_LENGTH: 3,\n        HAS_CLOUDS: 1,\n        BOTTOM_PAD: 10,\n        TREX: {\n            WAITING_1: { x: 44, w: 44, h: 47, xOffset: 0 },\n            WAITING_2: { x: 0, w: 44, h: 47, xOffset: 0 },\n            RUNNING_1: { x: 88, w: 44, h: 47, xOffset: 0 },\n            RUNNING_2: { x: 132, w: 44, h: 47, xOffset: 0 },\n            JUMPING: { x: 0, w: 44, h: 47, xOffset: 0 },\n            CRASHED: { x: 220, w: 44, h: 47, xOffset: 0 },\n            COLLISION_BOXES: [\n                new CollisionBox(22, 0, 17, 16),\n                new CollisionBox(1, 18, 30, 9),\n                new CollisionBox(10, 35, 14, 8),\n                new CollisionBox(1, 24, 29, 5),\n                new CollisionBox(5, 30, 21, 4),\n                new CollisionBox(9, 34, 15, 4),\n            ],\n        },\n        /** @type {Array<ObstacleType>} */\n        OBSTACLES: [\n            {\n                type: 'CACTUS_SMALL',\n                width: 17,\n                height: 35,\n                yPos: 105,\n                multipleSpeed: 4,\n                minGap: 120,\n                minSpeed: 0,\n                collisionBoxes: [\n                    new CollisionBox(0, 7, 5, 27),\n                    new CollisionBox(4, 0, 6, 34),\n                    new CollisionBox(10, 4, 7, 14),\n                ],\n            },\n            {\n                type: 'CACTUS_LARGE',\n                width: 25,\n                height: 50,\n                yPos: 90,\n                multipleSpeed: 7,\n                minGap: 120,\n                minSpeed: 0,\n                collisionBoxes: [\n                    new CollisionBox(0, 12, 7, 38),\n                    new CollisionBox(8, 0, 7, 49),\n                    new CollisionBox(13, 10, 10, 38),\n                ],\n            },\n            {\n                type: 'PTERODACTYL',\n                width: 46,\n                height: 40,\n                yPos: [100, 75, 50], // Variable height.\n                yPosMobile: [100, 50], // Variable height mobile.\n                multipleSpeed: 999,\n                minSpeed: 8.5,\n                minGap: 150,\n                collisionBoxes: [\n                    new CollisionBox(15, 15, 16, 5),\n                    new CollisionBox(18, 21, 24, 6),\n                    new CollisionBox(2, 14, 4, 3),\n                    new CollisionBox(6, 10, 4, 7),\n                    new CollisionBox(10, 8, 6, 9),\n                ],\n                numFrames: 2,\n                frameRate: 1000 / 6,\n                speedOffset: .8,\n            },\n            {\n                type: 'COLLECTABLE',\n                width: 31,\n                height: 24,\n                yPos: 104,\n                multipleSpeed: 1000,\n                minGap: 9999,\n                minSpeed: 0,\n                collisionBoxes: [\n                    new CollisionBox(0, 0, 32, 25),\n                ],\n            },\n        ],\n        BACKGROUND_EL: {\n            'CLOUD': {\n                HEIGHT: 14,\n                MAX_CLOUD_GAP: 400,\n                MAX_SKY_LEVEL: 30,\n                MIN_CLOUD_GAP: 100,\n                MIN_SKY_LEVEL: 71,\n                OFFSET: 4,\n                WIDTH: 46,\n                X_POS: 1,\n                Y_POS: 120,\n            },\n        },\n        BACKGROUND_EL_CONFIG: {\n            MAX_BG_ELS: 1,\n            MAX_GAP: 400,\n            MIN_GAP: 100,\n            POS: 0,\n            SPEED: 0.5,\n            Y_POS: 125,\n        },\n        LINES: [\n            { SOURCE_X: 2, SOURCE_Y: 52, WIDTH: 600, HEIGHT: 12, YPOS: 127 },\n        ],\n        ALT_GAME_OVER_TEXT_CONFIG: {\n            TEXT_X: 32,\n            TEXT_Y: 0,\n            TEXT_WIDTH: 246,\n            TEXT_HEIGHT: 17,\n            FLASH_DURATION: 1500,\n            FLASHING: false,\n        },\n    },\n    altgame: {\n        LDPI: {\n            BACKGROUND_EL: { x: 260, y: 19 },\n            OBSTACLE1: { x: 152, y: 65 },\n            OBSTACLE2: { x: 188, y: 65 },\n            OBSTACLE3: { x: 152, y: 65 },\n            OBSTACLE4: { x: 188, y: 65 },\n            OBSTACLE5: { x: 0, y: 60 },\n            OBSTACLE6: { x: 42, y: 58 },\n            OBSTACLE7: { x: 98, y: 58 },\n            OBSTACLE8: { x: 96, y: 19 },\n            HORIZON: { x: 0, y: 3 },\n            TREX: { x: 557, y: 63 },\n            COLLECTABLE: { x: 193, y: 19 },\n        },\n        HDPI: {\n            BACKGROUND_EL: { x: 520, y: 38 },\n            OBSTACLE1: { x: 304, y: 130 },\n            OBSTACLE2: { x: 376, y: 130 },\n            OBSTACLE3: { x: 304, y: 130 },\n            OBSTACLE4: { x: 376, y: 130 },\n            OBSTACLE5: { x: 0, y: 120 },\n            OBSTACLE6: { x: 84, y: 116 },\n            OBSTACLE7: { x: 196, y: 116 },\n            OBSTACLE8: { x: 192, y: 38 },\n            HORIZON: { x: 0, y: 6 },\n            TREX: { x: 1114, y: 126 },\n            COLLECTABLE: { x: 386, y: 38 },\n        },\n        MAX_GAP_COEFFICIENT: 1.5,\n        MAX_OBSTACLE_LENGTH: 2,\n        HAS_CLOUDS: 0,\n        BOTTOM_PAD: 10,\n        TREX: {\n            MAX_JUMP_HEIGHT: 50,\n            MIN_JUMP_HEIGHT: 40,\n            INITIAL_JUMP_VELOCITY: -10,\n            RUNNING_1: { x: 96, w: 49, h: 47, xOffset: 0 },\n            RUNNING_2: { x: 145, w: 49, h: 47, xOffset: 0 },\n            JUMPING: { x: 47, w: 49, h: 47, xOffset: 0 },\n            CRASHED: { x: 194, w: 61, h: 47, xOffset: 0 },\n            DUCKING_1: { x: 257, w: 55, h: 26, xOffset: 0 },\n            DUCKING_2: { x: 316, w: 55, h: 26, xOffset: 0 },\n            COLLISION_BOXES: [\n                new CollisionBox(22, 0, 17, 16),\n                new CollisionBox(1, 18, 30, 9),\n                new CollisionBox(10, 35, 14, 8),\n                new CollisionBox(1, 24, 29, 5),\n                new CollisionBox(5, 30, 21, 4),\n                new CollisionBox(9, 34, 15, 4),\n            ],\n        },\n        /** @type {Array<ObstacleType>} */\n        OBSTACLES: [\n            {\n                type: 'OBSTACLE1',\n                width: 36,\n                height: 45,\n                yPos: 95,\n                multipleSpeed: 999,\n                minGap: 120,\n                minSpeed: 0,\n                collisionBoxes: [\n                    new CollisionBox(0, 17, 8, 28),\n                    new CollisionBox(6, 3, 24, 42),\n                    new CollisionBox(28, 17, 8, 28),\n                ],\n            },\n            {\n                type: 'OBSTACLE2',\n                width: 36,\n                height: 45,\n                yPos: 95,\n                multipleSpeed: 999,\n                minGap: 120,\n                minSpeed: 0,\n                collisionBoxes: [\n                    new CollisionBox(0, 17, 8, 28),\n                    new CollisionBox(6, 3, 24, 42),\n                    new CollisionBox(28, 17, 8, 28),\n                ],\n            },\n            {\n                type: 'OBSTACLE3',\n                width: 72,\n                height: 45,\n                yPos: 95,\n                multipleSpeed: 999,\n                minGap: 120,\n                minSpeed: 8,\n                collisionBoxes: [\n                    new CollisionBox(0, 17, 8, 28),\n                    new CollisionBox(6, 3, 24, 42),\n                    new CollisionBox(28, 17, 8, 28),\n                    new CollisionBox(36, 17, 8, 28),\n                    new CollisionBox(42, 3, 24, 42),\n                    new CollisionBox(64, 17, 8, 28),\n                ],\n            },\n            {\n                type: 'OBSTACLE4',\n                width: 72,\n                height: 45,\n                yPos: 95,\n                multipleSpeed: 999,\n                minGap: 120,\n                minSpeed: 8,\n                collisionBoxes: [\n                    new CollisionBox(0, 17, 8, 28),\n                    new CollisionBox(6, 3, 24, 42),\n                    new CollisionBox(28, 17, 8, 28),\n                    new CollisionBox(36, 17, 8, 28),\n                    new CollisionBox(42, 3, 24, 42),\n                    new CollisionBox(64, 17, 8, 28),\n                ],\n            },\n            {\n                type: 'OBSTACLE5',\n                width: 42,\n                height: 50,\n                yPos: 95,\n                multipleSpeed: 999,\n                minGap: 120,\n                minSpeed: 5,\n                collisionBoxes: [\n                    new CollisionBox(0, 0, 42, 50),\n                ],\n            },\n            {\n                type: 'OBSTACLE6',\n                width: 56,\n                height: 52,\n                yPos: 93,\n                multipleSpeed: 999,\n                minGap: 120,\n                minSpeed: 7,\n                collisionBoxes: [\n                    new CollisionBox(0, 11, 8, 40),\n                    new CollisionBox(8, 0, 19, 51),\n                    new CollisionBox(27, 11, 28, 40),\n                ],\n            },\n            {\n                type: 'OBSTACLE7',\n                width: 54,\n                height: 52,\n                yPos: 93,\n                multipleSpeed: 999,\n                minGap: 120,\n                minSpeed: 6,\n                collisionBoxes: [\n                    new CollisionBox(0, 11, 19, 40),\n                    new CollisionBox(19, 0, 19, 51),\n                    new CollisionBox(38, 14, 15, 37),\n                ],\n            },\n            {\n                type: 'OBSTACLE8',\n                width: 49,\n                height: 20,\n                yPos: [100, 75, 50], // Variable height.\n                yPosMobile: [100, 50], // Variable height mobile.\n                multipleSpeed: 999,\n                minSpeed: 8.5,\n                minGap: 150,\n                collisionBoxes: [\n                    new CollisionBox(15, 15, 16, 5),\n                    new CollisionBox(18, 21, 24, 6),\n                    new CollisionBox(2, 14, 4, 3),\n                    new CollisionBox(6, 10, 4, 7),\n                    new CollisionBox(10, 8, 6, 9),\n                ],\n                numFrames: 2,\n                frameRate: 1000 / 6,\n                speedOffset: .8,\n            },\n        ],\n        BACKGROUND_EL: {\n            'GROUP1': {\n                HEIGHT: 91,\n                MAX_CLOUD_GAP: 600,\n                MAX_SKY_LEVEL: 0,\n                MIN_CLOUD_GAP: 300,\n                MIN_SKY_LEVEL: 0,\n                OFFSET: 11,\n                WIDTH: 131,\n                X_POS: 260,\n            },\n            'GROUP2': {\n                HEIGHT: 91,\n                MAX_CLOUD_GAP: 600,\n                MAX_SKY_LEVEL: 0,\n                MIN_CLOUD_GAP: 300,\n                MIN_SKY_LEVEL: 0,\n                OFFSET: 11,\n                WIDTH: 166,\n                X_POS: 391,\n            },\n        },\n        BACKGROUND_EL_CONFIG: {\n            MAX_BG_ELS: 8,\n            MAX_GAP: 600,\n            MIN_GAP: 300,\n            POS: 0,\n            SPEED: 0.8,\n            Y_POS: 122,\n        },\n        LINES: [\n            { SOURCE_X: 2, SOURCE_Y: 3, WIDTH: 600, HEIGHT: 12, YPOS: 128 },\n        ],\n    },\n};\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nclass Trex {\n    /**\n     * T-rex game character.\n     * @param {HTMLCanvasElement} canvas\n     * @param {Object} spritePos Positioning within image sprite.\n     */\n    constructor(canvas, spritePos) {\n        this.canvas = canvas;\n        this.canvasCtx =\n            /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));\n        this.spritePos = spritePos;\n        this.xPos = 0;\n        this.yPos = 0;\n        this.xInitialPos = 0;\n        // Position when on the ground.\n        this.groundYPos = 0;\n        this.currentFrame = 0;\n        this.currentAnimFrames = [];\n        this.blinkDelay = 0;\n        this.blinkCount = 0;\n        this.animStartTime = 0;\n        this.timer = 0;\n        this.msPerFrame = 1000 / FPS;\n        this.config = Object.assign(Trex.config, Trex.normalJumpConfig);\n        // Current status.\n        this.status = Trex.status.WAITING;\n        this.jumping = false;\n        this.ducking = false;\n        this.jumpVelocity = 0;\n        this.reachedMinHeight = false;\n        this.speedDrop = false;\n        this.jumpCount = 0;\n        this.jumpspotX = 0;\n        this.altGameModeEnabled = false;\n        this.flashing = false;\n        this.init();\n    }\n    /**\n     * T-rex player initialiser.\n     * Sets the t-rex to blink at random intervals.\n     */\n    init() {\n        this.groundYPos = Runner.defaultDimensions.HEIGHT - this.config.HEIGHT -\n            Runner.config.BOTTOM_PAD;\n        this.yPos = this.groundYPos;\n        this.minJumpHeight = this.groundYPos - this.config.MIN_JUMP_HEIGHT;\n        this.draw(0, 0);\n        this.update(0, Trex.status.WAITING);\n    }\n    /**\n     * Assign the appropriate jump parameters based on the game speed.\n     */\n    enableSlowConfig() {\n        const jumpConfig = Runner.slowDown ? Trex.slowJumpConfig : Trex.normalJumpConfig;\n        Trex.config = Object.assign(Trex.config, jumpConfig);\n        this.adjustAltGameConfigForSlowSpeed();\n    }\n    /**\n     * Enables the alternative game. Redefines the dino config.\n     * @param {Object} spritePos New positioning within image sprite.\n     */\n    enableAltGameMode(spritePos) {\n        this.altGameModeEnabled = true;\n        this.spritePos = spritePos;\n        const spriteDefinition = Runner.spriteDefinition['TREX'];\n        // Update animation frames.\n        Trex.animFrames.RUNNING.frames =\n            [spriteDefinition.RUNNING_1.x, spriteDefinition.RUNNING_2.x];\n        Trex.animFrames.CRASHED.frames = [spriteDefinition.CRASHED.x];\n        if (typeof spriteDefinition.JUMPING.x === 'object') {\n            Trex.animFrames.JUMPING.frames = spriteDefinition.JUMPING.x;\n        }\n        else {\n            Trex.animFrames.JUMPING.frames = [spriteDefinition.JUMPING.x];\n        }\n        Trex.animFrames.DUCKING.frames =\n            [spriteDefinition.DUCKING_1.x, spriteDefinition.DUCKING_2.x];\n        // Update Trex config\n        Trex.config.GRAVITY = spriteDefinition.GRAVITY || Trex.config.GRAVITY;\n        Trex.config.HEIGHT = spriteDefinition.RUNNING_1.h,\n            Trex.config.INITIAL_JUMP_VELOCITY = spriteDefinition.INITIAL_JUMP_VELOCITY;\n        Trex.config.MAX_JUMP_HEIGHT = spriteDefinition.MAX_JUMP_HEIGHT;\n        Trex.config.MIN_JUMP_HEIGHT = spriteDefinition.MIN_JUMP_HEIGHT;\n        Trex.config.WIDTH = spriteDefinition.RUNNING_1.w;\n        Trex.config.WIDTH_CRASHED = spriteDefinition.CRASHED.w;\n        Trex.config.WIDTH_JUMP = spriteDefinition.JUMPING.w;\n        Trex.config.INVERT_JUMP = spriteDefinition.INVERT_JUMP;\n        this.adjustAltGameConfigForSlowSpeed(spriteDefinition.GRAVITY);\n        this.config = Trex.config;\n        // Adjust bottom horizon placement.\n        this.groundYPos = Runner.defaultDimensions.HEIGHT - this.config.HEIGHT -\n            Runner.spriteDefinition['BOTTOM_PAD'];\n        this.yPos = this.groundYPos;\n        this.reset();\n    }\n    /**\n     * Slow speeds adjustments for the alt game modes.\n     * @param {number=} opt_gravityValue\n     */\n    adjustAltGameConfigForSlowSpeed(opt_gravityValue) {\n        if (Runner.slowDown) {\n            if (opt_gravityValue) {\n                Trex.config.GRAVITY = opt_gravityValue / 1.5;\n            }\n            Trex.config.MIN_JUMP_HEIGHT *= 1.5;\n            Trex.config.MAX_JUMP_HEIGHT *= 1.5;\n            Trex.config.INITIAL_JUMP_VELOCITY =\n                Trex.config.INITIAL_JUMP_VELOCITY * 1.5;\n        }\n    }\n    /**\n     * Setter whether dino is flashing.\n     * @param {boolean} status\n     */\n    setFlashing(status) {\n        this.flashing = status;\n    }\n    /**\n     * Setter for the jump velocity.\n     * The appropriate drop velocity is also set.\n     * @param {number} setting\n     */\n    setJumpVelocity(setting) {\n        this.config.INITIAL_JUMP_VELOCITY = -setting;\n        this.config.DROP_VELOCITY = -setting / 2;\n    }\n    /**\n     * Set the animation status.\n     * @param {!number} deltaTime\n     * @param {Trex.status=} opt_status Optional status to switch to.\n     */\n    update(deltaTime, opt_status) {\n        this.timer += deltaTime;\n        // Update the status.\n        if (opt_status) {\n            this.status = opt_status;\n            this.currentFrame = 0;\n            this.msPerFrame = Trex.animFrames[opt_status].msPerFrame;\n            this.currentAnimFrames = Trex.animFrames[opt_status].frames;\n            if (opt_status === Trex.status.WAITING) {\n                this.animStartTime = getTimeStamp();\n                this.setBlinkDelay();\n            }\n        }\n        // Game intro animation, T-rex moves in from the left.\n        if (this.playingIntro && this.xPos < this.config.START_X_POS) {\n            this.xPos += Math.round((this.config.START_X_POS / this.config.INTRO_DURATION) * deltaTime);\n            this.xInitialPos = this.xPos;\n        }\n        if (this.status === Trex.status.WAITING) {\n            this.blink(getTimeStamp());\n        }\n        else {\n            this.draw(this.currentAnimFrames[this.currentFrame], 0);\n        }\n        // Update the frame position.\n        if (!this.flashing && this.timer >= this.msPerFrame) {\n            this.currentFrame =\n                this.currentFrame === this.currentAnimFrames.length - 1 ?\n                    0 :\n                    this.currentFrame + 1;\n            this.timer = 0;\n        }\n        // Speed drop becomes duck if the down key is still being pressed.\n        if (this.speedDrop && this.yPos === this.groundYPos) {\n            this.speedDrop = false;\n            this.setDuck(true);\n        }\n    }\n    /**\n     * Draw the t-rex to a particular position.\n     * @param {number} x\n     * @param {number} y\n     */\n    draw(x, y) {\n        let sourceX = x;\n        let sourceY = y;\n        let sourceWidth = this.ducking && this.status !== Trex.status.CRASHED ?\n            this.config.WIDTH_DUCK :\n            this.config.WIDTH;\n        let sourceHeight = this.config.HEIGHT;\n        const outputHeight = sourceHeight;\n        const outputWidth = this.altGameModeEnabled && this.status === Trex.status.CRASHED ?\n            this.config.WIDTH_CRASHED :\n            this.config.WIDTH;\n        let jumpOffset = Runner.spriteDefinition.TREX.JUMPING.xOffset;\n        // Width of sprite can change on jump or crashed.\n        if (this.altGameModeEnabled) {\n            if (this.jumping && this.status !== Trex.status.CRASHED) {\n                sourceWidth = this.config.WIDTH_JUMP;\n            }\n            else if (this.status === Trex.status.CRASHED) {\n                sourceWidth = this.config.WIDTH_CRASHED;\n            }\n        }\n        if (IS_HIDPI) {\n            sourceX *= 2;\n            sourceY *= 2;\n            sourceWidth *= 2;\n            sourceHeight *= 2;\n            jumpOffset *= 2;\n        }\n        // Adjustments for sprite sheet position.\n        sourceX += this.spritePos.x;\n        sourceY += this.spritePos.y;\n        // Flashing.\n        if (this.flashing) {\n            if (this.timer < this.config.FLASH_ON) {\n                this.canvasCtx.globalAlpha = 0.5;\n            }\n            else if (this.timer > this.config.FLASH_OFF) {\n                this.timer = 0;\n            }\n        }\n        // Ducking.\n        if (this.ducking && this.status !== Trex.status.CRASHED) {\n            this.canvasCtx.drawImage(Runner.imageSprite, sourceX, sourceY, sourceWidth, sourceHeight, this.xPos, this.yPos, this.config.WIDTH_DUCK, outputHeight);\n        }\n        else if (this.altGameModeEnabled && this.jumping &&\n            this.status !== Trex.status.CRASHED) {\n            // Jumping with adjustments.\n            this.canvasCtx.drawImage(Runner.imageSprite, sourceX, sourceY, sourceWidth, sourceHeight, this.xPos - jumpOffset, this.yPos, this.config.WIDTH_JUMP, outputHeight);\n        }\n        else {\n            // Crashed whilst ducking. Trex is standing up so needs adjustment.\n            if (this.ducking && this.status === Trex.status.CRASHED) {\n                this.xPos++;\n            }\n            // Standing / running\n            this.canvasCtx.drawImage(Runner.imageSprite, sourceX, sourceY, sourceWidth, sourceHeight, this.xPos, this.yPos, outputWidth, outputHeight);\n        }\n        this.canvasCtx.globalAlpha = 1;\n    }\n    /**\n     * Sets a random time for the blink to happen.\n     */\n    setBlinkDelay() {\n        this.blinkDelay = Math.ceil(Math.random() * Trex.BLINK_TIMING);\n    }\n    /**\n     * Make t-rex blink at random intervals.\n     * @param {number} time Current time in milliseconds.\n     */\n    blink(time) {\n        const deltaTime = time - this.animStartTime;\n        if (deltaTime >= this.blinkDelay) {\n            this.draw(this.currentAnimFrames[this.currentFrame], 0);\n            if (this.currentFrame === 1) {\n                // Set new random delay to blink.\n                this.setBlinkDelay();\n                this.animStartTime = time;\n                this.blinkCount++;\n            }\n        }\n    }\n    /**\n     * Initialise a jump.\n     * @param {number} speed\n     */\n    startJump(speed) {\n        if (!this.jumping) {\n            this.update(0, Trex.status.JUMPING);\n            // Tweak the jump velocity based on the speed.\n            this.jumpVelocity = this.config.INITIAL_JUMP_VELOCITY - (speed / 10);\n            this.jumping = true;\n            this.reachedMinHeight = false;\n            this.speedDrop = false;\n            if (this.config.INVERT_JUMP) {\n                this.minJumpHeight = this.groundYPos + this.config.MIN_JUMP_HEIGHT;\n            }\n        }\n    }\n    /**\n     * Jump is complete, falling down.\n     */\n    endJump() {\n        if (this.reachedMinHeight &&\n            this.jumpVelocity < this.config.DROP_VELOCITY) {\n            this.jumpVelocity = this.config.DROP_VELOCITY;\n        }\n    }\n    /**\n     * Update frame for a jump.\n     * @param {number} deltaTime\n     */\n    updateJump(deltaTime) {\n        const msPerFrame = Trex.animFrames[this.status].msPerFrame;\n        const framesElapsed = deltaTime / msPerFrame;\n        // Speed drop makes Trex fall faster.\n        if (this.speedDrop) {\n            this.yPos += Math.round(this.jumpVelocity * this.config.SPEED_DROP_COEFFICIENT *\n                framesElapsed);\n        }\n        else if (this.config.INVERT_JUMP) {\n            this.yPos -= Math.round(this.jumpVelocity * framesElapsed);\n        }\n        else {\n            this.yPos += Math.round(this.jumpVelocity * framesElapsed);\n        }\n        this.jumpVelocity += this.config.GRAVITY * framesElapsed;\n        // Minimum height has been reached.\n        if (this.config.INVERT_JUMP && (this.yPos > this.minJumpHeight) ||\n            !this.config.INVERT_JUMP && (this.yPos < this.minJumpHeight) ||\n            this.speedDrop) {\n            this.reachedMinHeight = true;\n        }\n        // Reached max height.\n        if (this.config.INVERT_JUMP && (this.yPos > -this.config.MAX_JUMP_HEIGHT) ||\n            !this.config.INVERT_JUMP && (this.yPos < this.config.MAX_JUMP_HEIGHT) ||\n            this.speedDrop) {\n            this.endJump();\n        }\n        // Back down at ground level. Jump completed.\n        if ((this.config.INVERT_JUMP && this.yPos) < this.groundYPos ||\n            (!this.config.INVERT_JUMP && this.yPos) > this.groundYPos) {\n            this.reset();\n            this.jumpCount++;\n            if (Runner.audioCues) {\n                Runner.generatedSoundFx.loopFootSteps();\n            }\n        }\n    }\n    /**\n     * Set the speed drop. Immediately cancels the current jump.\n     */\n    setSpeedDrop() {\n        this.speedDrop = true;\n        this.jumpVelocity = 1;\n    }\n    /**\n     * @param {boolean} isDucking\n     */\n    setDuck(isDucking) {\n        if (isDucking && this.status !== Trex.status.DUCKING) {\n            this.update(0, Trex.status.DUCKING);\n            this.ducking = true;\n        }\n        else if (this.status === Trex.status.DUCKING) {\n            this.update(0, Trex.status.RUNNING);\n            this.ducking = false;\n        }\n    }\n    /**\n     * Reset the t-rex to running at start of game.\n     */\n    reset() {\n        this.xPos = this.xInitialPos;\n        this.yPos = this.groundYPos;\n        this.jumpVelocity = 0;\n        this.jumping = false;\n        this.ducking = false;\n        this.update(0, Trex.status.RUNNING);\n        this.midair = false;\n        this.speedDrop = false;\n        this.jumpCount = 0;\n    }\n}\n/**\n * T-rex player config.\n */\nTrex.config = {\n    DROP_VELOCITY: -5,\n    FLASH_OFF: 175,\n    FLASH_ON: 100,\n    HEIGHT: 47,\n    HEIGHT_DUCK: 25,\n    INTRO_DURATION: 1500,\n    SPEED_DROP_COEFFICIENT: 3,\n    SPRITE_WIDTH: 262,\n    START_X_POS: 50,\n    WIDTH: 44,\n    WIDTH_DUCK: 59,\n};\nTrex.slowJumpConfig = {\n    GRAVITY: 0.25,\n    MAX_JUMP_HEIGHT: 50,\n    MIN_JUMP_HEIGHT: 45,\n    INITIAL_JUMP_VELOCITY: -20,\n};\nTrex.normalJumpConfig = {\n    GRAVITY: 0.6,\n    MAX_JUMP_HEIGHT: 30,\n    MIN_JUMP_HEIGHT: 30,\n    INITIAL_JUMP_VELOCITY: -10,\n};\n/**\n * Used in collision detection.\n * @enum {Array<CollisionBox>}\n */\nTrex.collisionBoxes = {\n    DUCKING: [new CollisionBox(1, 18, 55, 25)],\n    RUNNING: [\n        new CollisionBox(22, 0, 17, 16),\n        new CollisionBox(1, 18, 30, 9),\n        new CollisionBox(10, 35, 14, 8),\n        new CollisionBox(1, 24, 29, 5),\n        new CollisionBox(5, 30, 21, 4),\n        new CollisionBox(9, 34, 15, 4),\n    ],\n};\n/**\n * Animation states.\n * @enum {string}\n */\nTrex.status = {\n    CRASHED: 'CRASHED',\n    DUCKING: 'DUCKING',\n    JUMPING: 'JUMPING',\n    RUNNING: 'RUNNING',\n    WAITING: 'WAITING',\n};\n/**\n * Blinking coefficient.\n * @const\n */\nTrex.BLINK_TIMING = 7000;\n/**\n * Animation config for different states.\n * @enum {Object}\n */\nTrex.animFrames = {\n    WAITING: {\n        frames: [44, 0],\n        msPerFrame: 1000 / 3,\n    },\n    RUNNING: {\n        frames: [88, 132],\n        msPerFrame: 1000 / 12,\n    },\n    CRASHED: {\n        frames: [220],\n        msPerFrame: 1000 / 60,\n    },\n    JUMPING: {\n        frames: [0],\n        msPerFrame: 1000 / 60,\n    },\n    DUCKING: {\n        frames: [264, 323],\n        msPerFrame: 1000 / 8,\n    },\n};\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nclass GameOverPanel {\n    /**\n     * Game over panel.\n     * @param {!HTMLCanvasElement} canvas\n     * @param {Object} textImgPos\n     * @param {Object} restartImgPos\n     * @param {!Object} dimensions Canvas dimensions.\n     * @param {Object=} opt_altGameEndImgPos\n     * @param {boolean=} opt_altGameActive\n     */\n    constructor(canvas, textImgPos, restartImgPos, dimensions, opt_altGameEndImgPos, opt_altGameActive) {\n        this.canvas = canvas;\n        this.canvasCtx =\n            /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));\n        this.canvasDimensions = dimensions;\n        this.textImgPos = textImgPos;\n        this.restartImgPos = restartImgPos;\n        this.altGameEndImgPos = opt_altGameEndImgPos;\n        this.altGameModeActive = opt_altGameActive;\n        // Retry animation.\n        this.frameTimeStamp = 0;\n        this.animTimer = 0;\n        this.currentFrame = 0;\n        this.gameOverRafId = null;\n        this.flashTimer = 0;\n        this.flashCounter = 0;\n        this.originalText = true;\n    }\n    /**\n     * Update the panel dimensions.\n     * @param {number} width New canvas width.\n     * @param {number} opt_height Optional new canvas height.\n     */\n    updateDimensions(width, opt_height) {\n        this.canvasDimensions.WIDTH = width;\n        if (opt_height) {\n            this.canvasDimensions.HEIGHT = opt_height;\n        }\n        this.currentFrame = GameOverPanel.animConfig.frames.length - 1;\n    }\n    drawGameOverText(dimensions, opt_useAltText) {\n        const centerX = this.canvasDimensions.WIDTH / 2;\n        let textSourceX = dimensions.TEXT_X;\n        let textSourceY = dimensions.TEXT_Y;\n        let textSourceWidth = dimensions.TEXT_WIDTH;\n        let textSourceHeight = dimensions.TEXT_HEIGHT;\n        const textTargetX = Math.round(centerX - (dimensions.TEXT_WIDTH / 2));\n        const textTargetY = Math.round((this.canvasDimensions.HEIGHT - 25) / 3);\n        const textTargetWidth = dimensions.TEXT_WIDTH;\n        const textTargetHeight = dimensions.TEXT_HEIGHT;\n        if (IS_HIDPI) {\n            textSourceY *= 2;\n            textSourceX *= 2;\n            textSourceWidth *= 2;\n            textSourceHeight *= 2;\n        }\n        if (!opt_useAltText) {\n            textSourceX += this.textImgPos.x;\n            textSourceY += this.textImgPos.y;\n        }\n        const spriteSource = opt_useAltText ? Runner.altCommonImageSprite : Runner.origImageSprite;\n        this.canvasCtx.save();\n        if (IS_RTL) {\n            this.canvasCtx.translate(this.canvasDimensions.WIDTH, 0);\n            this.canvasCtx.scale(-1, 1);\n        }\n        // Game over text from sprite.\n        this.canvasCtx.drawImage(spriteSource, textSourceX, textSourceY, textSourceWidth, textSourceHeight, textTargetX, textTargetY, textTargetWidth, textTargetHeight);\n        this.canvasCtx.restore();\n    }\n    /**\n     * Draw additional adornments for alternative game types.\n     */\n    drawAltGameElements(tRex) {\n        // Additional adornments.\n        if (this.altGameModeActive && Runner.spriteDefinition.ALT_GAME_END_CONFIG) {\n            const altGameEndConfig = Runner.spriteDefinition.ALT_GAME_END_CONFIG;\n            let altGameEndSourceWidth = altGameEndConfig.WIDTH;\n            let altGameEndSourceHeight = altGameEndConfig.HEIGHT;\n            const altGameEndTargetX = tRex.xPos + altGameEndConfig.X_OFFSET;\n            const altGameEndTargetY = tRex.yPos + altGameEndConfig.Y_OFFSET;\n            if (IS_HIDPI) {\n                altGameEndSourceWidth *= 2;\n                altGameEndSourceHeight *= 2;\n            }\n            this.canvasCtx.drawImage(Runner.altCommonImageSprite, this.altGameEndImgPos.x, this.altGameEndImgPos.y, altGameEndSourceWidth, altGameEndSourceHeight, altGameEndTargetX, altGameEndTargetY, altGameEndConfig.WIDTH, altGameEndConfig.HEIGHT);\n        }\n    }\n    /**\n     * Draw restart button.\n     */\n    drawRestartButton() {\n        const dimensions = GameOverPanel.dimensions;\n        let framePosX = GameOverPanel.animConfig.frames[this.currentFrame];\n        let restartSourceWidth = dimensions.RESTART_WIDTH;\n        let restartSourceHeight = dimensions.RESTART_HEIGHT;\n        const restartTargetX = (this.canvasDimensions.WIDTH / 2) - (dimensions.RESTART_WIDTH / 2);\n        const restartTargetY = this.canvasDimensions.HEIGHT / 2;\n        if (IS_HIDPI) {\n            restartSourceWidth *= 2;\n            restartSourceHeight *= 2;\n            framePosX *= 2;\n        }\n        this.canvasCtx.save();\n        if (IS_RTL) {\n            this.canvasCtx.translate(this.canvasDimensions.WIDTH, 0);\n            this.canvasCtx.scale(-1, 1);\n        }\n        this.canvasCtx.drawImage(Runner.origImageSprite, this.restartImgPos.x + framePosX, this.restartImgPos.y, restartSourceWidth, restartSourceHeight, restartTargetX, restartTargetY, dimensions.RESTART_WIDTH, dimensions.RESTART_HEIGHT);\n        this.canvasCtx.restore();\n    }\n    /**\n     * Draw the panel.\n     * @param {boolean} opt_altGameModeActive\n     * @param {!Trex} opt_tRex\n     */\n    draw(opt_altGameModeActive, opt_tRex) {\n        if (opt_altGameModeActive) {\n            this.altGameModeActive = opt_altGameModeActive;\n        }\n        this.drawGameOverText(GameOverPanel.dimensions, false);\n        this.drawRestartButton();\n        this.drawAltGameElements(opt_tRex);\n        this.update();\n    }\n    /**\n     * Update animation frames.\n     */\n    update() {\n        const now = getTimeStamp();\n        const deltaTime = now - (this.frameTimeStamp || now);\n        this.frameTimeStamp = now;\n        this.animTimer += deltaTime;\n        this.flashTimer += deltaTime;\n        // Restart Button\n        if (this.currentFrame === 0 &&\n            this.animTimer > GameOverPanel.LOGO_PAUSE_DURATION) {\n            this.animTimer = 0;\n            this.currentFrame++;\n            this.drawRestartButton();\n        }\n        else if (this.currentFrame > 0 &&\n            this.currentFrame < GameOverPanel.animConfig.frames.length) {\n            if (this.animTimer >= GameOverPanel.animConfig.msPerFrame) {\n                this.currentFrame++;\n                this.drawRestartButton();\n            }\n        }\n        else if (!this.altGameModeActive &&\n            this.currentFrame === GameOverPanel.animConfig.frames.length) {\n            this.reset();\n            return;\n        }\n        // Game over text\n        if (this.altGameModeActive &&\n            spriteDefinitionByType.original.ALT_GAME_OVER_TEXT_CONFIG) {\n            const altTextConfig = spriteDefinitionByType.original.ALT_GAME_OVER_TEXT_CONFIG;\n            if (altTextConfig.FLASHING) {\n                if (this.flashCounter < GameOverPanel.FLASH_ITERATIONS &&\n                    this.flashTimer > altTextConfig.FLASH_DURATION) {\n                    this.flashTimer = 0;\n                    this.originalText = !this.originalText;\n                    this.clearGameOverTextBounds();\n                    if (this.originalText) {\n                        this.drawGameOverText(GameOverPanel.dimensions, false);\n                        this.flashCounter++;\n                    }\n                    else {\n                        this.drawGameOverText(altTextConfig, true);\n                    }\n                }\n                else if (this.flashCounter >= GameOverPanel.FLASH_ITERATIONS) {\n                    this.reset();\n                    return;\n                }\n            }\n            else {\n                this.clearGameOverTextBounds(altTextConfig);\n                this.drawGameOverText(altTextConfig, true);\n            }\n        }\n        this.gameOverRafId = requestAnimationFrame(this.update.bind(this));\n    }\n    /**\n     * Clear game over text.\n     * @param {Object} dimensions Game over text config.\n     */\n    clearGameOverTextBounds(dimensions) {\n        this.canvasCtx.save();\n        this.canvasCtx.clearRect(Math.round(this.canvasDimensions.WIDTH / 2 - (dimensions.TEXT_WIDTH / 2)), Math.round((this.canvasDimensions.HEIGHT - 25) / 3), dimensions.TEXT_WIDTH, dimensions.TEXT_HEIGHT + 4);\n        this.canvasCtx.restore();\n    }\n    reset() {\n        if (this.gameOverRafId) {\n            cancelAnimationFrame(this.gameOverRafId);\n            this.gameOverRafId = null;\n        }\n        this.animTimer = 0;\n        this.frameTimeStamp = 0;\n        this.currentFrame = 0;\n        this.flashTimer = 0;\n        this.flashCounter = 0;\n        this.originalText = true;\n    }\n}\nGameOverPanel.RESTART_ANIM_DURATION = 875;\nGameOverPanel.LOGO_PAUSE_DURATION = 875;\nGameOverPanel.FLASH_ITERATIONS = 5;\n/**\n * Animation frames spec.\n */\nGameOverPanel.animConfig = {\n    frames: [0, 36, 72, 108, 144, 180, 216, 252],\n    msPerFrame: GameOverPanel.RESTART_ANIM_DURATION / 8,\n};\n/**\n * Dimensions used in the panel.\n * @enum {number}\n */\nGameOverPanel.dimensions = {\n    TEXT_X: 0,\n    TEXT_Y: 13,\n    TEXT_WIDTH: 191,\n    TEXT_HEIGHT: 11,\n    RESTART_WIDTH: 36,\n    RESTART_HEIGHT: 32,\n};\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n/**\n * Generated sound FX class for audio cues.\n */\nclass GeneratedSoundFx {\n    audioCues = false;\n    context = null;\n    panner = null;\n    bgSoundIntervalId = null;\n    init() {\n        this.audioCues = true;\n        if (!this.context) {\n            this.context = new AudioContext();\n            if (IS_IOS) {\n                this.context.onstatechange = () => {\n                    assert(this.context);\n                    if (this.context.state !== 'running') {\n                        this.context.resume();\n                    }\n                };\n                this.context.resume();\n            }\n            this.panner = this.context.createStereoPanner ?\n                this.context.createStereoPanner() :\n                null;\n        }\n    }\n    stopAll() {\n        this.cancelFootSteps();\n    }\n    /**\n     * Play oscillators at certain frequency and for a certain time.\n     */\n    playNote(frequency, startTime, duration, vol = 0.01, pan = 0) {\n        assert(this.context);\n        const osc1 = this.context.createOscillator();\n        const osc2 = this.context.createOscillator();\n        const volume = this.context.createGain();\n        // Set oscillator wave type\n        osc1.type = 'triangle';\n        osc2.type = 'triangle';\n        volume.gain.value = 0.1;\n        // Set up node routing\n        if (this.panner) {\n            this.panner.pan.value = pan;\n            osc1.connect(volume).connect(this.panner);\n            osc2.connect(volume).connect(this.panner);\n            this.panner.connect(this.context.destination);\n        }\n        else {\n            osc1.connect(volume);\n            osc2.connect(volume);\n            volume.connect(this.context.destination);\n        }\n        // Detune oscillators for chorus effect\n        osc1.frequency.value = frequency + 1;\n        osc2.frequency.value = frequency - 2;\n        // Fade out\n        volume.gain.setValueAtTime(vol, startTime + duration - 0.05);\n        volume.gain.linearRampToValueAtTime(0.00001, startTime + duration);\n        // Start oscillators\n        osc1.start(startTime);\n        osc2.start(startTime);\n        // Stop oscillators\n        osc1.stop(startTime + duration);\n        osc2.stop(startTime + duration);\n    }\n    background() {\n        assert(this.context);\n        if (this.audioCues) {\n            const now = this.context.currentTime;\n            this.playNote(493.883, now, 0.116);\n            this.playNote(659.255, now + 0.116, 0.232);\n            this.loopFootSteps();\n        }\n    }\n    loopFootSteps() {\n        if (this.audioCues && !this.bgSoundIntervalId) {\n            this.bgSoundIntervalId = setInterval(() => {\n                assert(this.context);\n                this.playNote(73.42, this.context.currentTime, 0.05, 0.16);\n                this.playNote(69.30, this.context.currentTime + 0.116, 0.116, 0.16);\n            }, 280);\n        }\n    }\n    cancelFootSteps() {\n        if (this.audioCues && this.bgSoundIntervalId) {\n            assert(this.context);\n            clearInterval(this.bgSoundIntervalId);\n            this.bgSoundIntervalId = null;\n            this.playNote(103.83, this.context.currentTime, 0.232, 0.02);\n            this.playNote(116.54, this.context.currentTime + 0.116, 0.232, 0.02);\n        }\n    }\n    collect() {\n        if (this.audioCues) {\n            assert(this.context);\n            this.cancelFootSteps();\n            const now = this.context.currentTime;\n            this.playNote(830.61, now, 0.116);\n            this.playNote(1318.51, now + 0.116, 0.232);\n        }\n    }\n    jump() {\n        if (this.audioCues) {\n            assert(this.context);\n            const now = this.context.currentTime;\n            this.playNote(659.25, now, 0.116, 0.3, -0.6);\n            this.playNote(880, now + 0.116, 0.232, 0.3, -0.6);\n        }\n    }\n}\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nclass BackgroundEl {\n    /**\n     * Background item.\n     * Similar to cloud, without random y position.\n     * @param {HTMLCanvasElement} canvas Canvas element.\n     * @param {Object} spritePos Position of image in sprite.\n     * @param {number} containerWidth\n     * @param {string} type Element type.\n     */\n    constructor(canvas, spritePos, containerWidth, type) {\n        this.canvas = canvas;\n        this.canvasCtx =\n            /** @type {CanvasRenderingContext2D} */ (this.canvas.getContext('2d'));\n        this.spritePos = spritePos;\n        this.containerWidth = containerWidth;\n        this.xPos = containerWidth;\n        this.yPos = 0;\n        this.remove = false;\n        this.type = type;\n        this.gap =\n            getRandomNum(BackgroundEl.config.MIN_GAP, BackgroundEl.config.MAX_GAP);\n        this.animTimer = 0;\n        this.switchFrames = false;\n        this.spriteConfig = {};\n        this.init();\n    }\n    /**\n     * Initialise the element setting the y position.\n     */\n    init() {\n        this.spriteConfig = Runner.spriteDefinition.BACKGROUND_EL[this.type];\n        if (this.spriteConfig.FIXED) {\n            this.xPos = this.spriteConfig.FIXED_X_POS;\n        }\n        this.yPos = BackgroundEl.config.Y_POS - this.spriteConfig.HEIGHT +\n            this.spriteConfig.OFFSET;\n        this.draw();\n    }\n    /**\n     * Draw the element.\n     */\n    draw() {\n        this.canvasCtx.save();\n        let sourceWidth = this.spriteConfig.WIDTH;\n        let sourceHeight = this.spriteConfig.HEIGHT;\n        let sourceX = this.spriteConfig.X_POS;\n        const outputWidth = sourceWidth;\n        const outputHeight = sourceHeight;\n        if (IS_HIDPI) {\n            sourceWidth *= 2;\n            sourceHeight *= 2;\n            sourceX *= 2;\n        }\n        this.canvasCtx.drawImage(Runner.imageSprite, sourceX, this.spritePos.y, sourceWidth, sourceHeight, this.xPos, this.yPos, outputWidth, outputHeight);\n        this.canvasCtx.restore();\n    }\n    /**\n     * Update the background element position.\n     * @param {number} speed\n     */\n    update(speed) {\n        if (!this.remove) {\n            if (this.spriteConfig.FIXED) {\n                this.animTimer += speed;\n                if (this.animTimer > BackgroundEl.config.MS_PER_FRAME) {\n                    this.animTimer = 0;\n                    this.switchFrames = !this.switchFrames;\n                }\n                if (this.spriteConfig.FIXED_Y_POS_1 &&\n                    this.spriteConfig.FIXED_Y_POS_2) {\n                    this.yPos = this.switchFrames ? this.spriteConfig.FIXED_Y_POS_1 :\n                        this.spriteConfig.FIXED_Y_POS_2;\n                }\n            }\n            else {\n                // Fixed speed, regardless of actual game speed.\n                this.xPos -= BackgroundEl.config.SPEED;\n            }\n            this.draw();\n            // Mark as removable if no longer in the canvas.\n            if (!this.isVisible()) {\n                this.remove = true;\n            }\n        }\n    }\n    /**\n     * Check if the element is visible on the stage.\n     * @return {boolean}\n     */\n    isVisible() {\n        return this.xPos + this.spriteConfig.WIDTH > 0;\n    }\n}\n/**\n * Background element object config.\n * Real values assigned when game type changes.\n * @enum {number}\n */\nBackgroundEl.config = {\n    MAX_BG_ELS: 0,\n    MAX_GAP: 0,\n    MIN_GAP: 0,\n    POS: 0,\n    SPEED: 0,\n    Y_POS: 0,\n    MS_PER_FRAME: 0, // only needed when BACKGROUND_EL.FIXED is true\n};\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nclass Cloud {\n    /**\n     * Cloud background item.\n     * Similar to an obstacle object but without collision boxes.\n     * @param {HTMLCanvasElement} canvas Canvas element.\n     * @param {Object} spritePos Position of image in sprite.\n     * @param {number} containerWidth\n     */\n    constructor(canvas, spritePos, containerWidth) {\n        this.canvas = canvas;\n        this.canvasCtx =\n            /** @type {CanvasRenderingContext2D} */ (this.canvas.getContext('2d'));\n        this.spritePos = spritePos;\n        this.containerWidth = containerWidth;\n        this.xPos = containerWidth;\n        this.yPos = 0;\n        this.remove = false;\n        this.gap =\n            getRandomNum(Cloud.config.MIN_CLOUD_GAP, Cloud.config.MAX_CLOUD_GAP);\n        this.init();\n    }\n    /**\n     * Initialise the cloud. Sets the Cloud height.\n     */\n    init() {\n        this.yPos =\n            getRandomNum(Cloud.config.MAX_SKY_LEVEL, Cloud.config.MIN_SKY_LEVEL);\n        this.draw();\n    }\n    /**\n     * Draw the cloud.\n     */\n    draw() {\n        this.canvasCtx.save();\n        let sourceWidth = Cloud.config.WIDTH;\n        let sourceHeight = Cloud.config.HEIGHT;\n        const outputWidth = sourceWidth;\n        const outputHeight = sourceHeight;\n        if (IS_HIDPI) {\n            sourceWidth = sourceWidth * 2;\n            sourceHeight = sourceHeight * 2;\n        }\n        this.canvasCtx.drawImage(Runner.imageSprite, this.spritePos.x, this.spritePos.y, sourceWidth, sourceHeight, this.xPos, this.yPos, outputWidth, outputHeight);\n        this.canvasCtx.restore();\n    }\n    /**\n     * Update the cloud position.\n     * @param {number} speed\n     */\n    update(speed) {\n        if (!this.remove) {\n            this.xPos -= Math.ceil(speed);\n            this.draw();\n            // Mark as removable if no longer in the canvas.\n            if (!this.isVisible()) {\n                this.remove = true;\n            }\n        }\n    }\n    /**\n     * Check if the cloud is visible on the stage.\n     * @return {boolean}\n     */\n    isVisible() {\n        return this.xPos + Cloud.config.WIDTH > 0;\n    }\n}\n/**\n * Cloud object config.\n * @enum {number}\n */\nCloud.config = {\n    HEIGHT: 14,\n    MAX_CLOUD_GAP: 400,\n    MAX_SKY_LEVEL: 30,\n    MIN_CLOUD_GAP: 100,\n    MIN_SKY_LEVEL: 71,\n    WIDTH: 46,\n};\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nclass HorizonLine {\n    /**\n     * Horizon Line.\n     * Consists of two connecting lines. Randomly assigns a flat / bumpy horizon.\n     * @param {HTMLCanvasElement} canvas\n     * @param {Object} lineConfig Configuration object.\n     */\n    constructor(canvas, lineConfig) {\n        let sourceX = lineConfig.SOURCE_X;\n        let sourceY = lineConfig.SOURCE_Y;\n        if (IS_HIDPI) {\n            sourceX *= 2;\n            sourceY *= 2;\n        }\n        this.spritePos = { x: sourceX, y: sourceY };\n        this.canvas = canvas;\n        this.canvasCtx =\n            /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));\n        this.sourceDimensions = {};\n        this.dimensions = lineConfig;\n        this.sourceXPos =\n            [this.spritePos.x, this.spritePos.x + this.dimensions.WIDTH];\n        this.xPos = [];\n        this.yPos = 0;\n        this.bumpThreshold = 0.5;\n        this.setSourceDimensions(lineConfig);\n        this.draw();\n    }\n    /**\n     * Set the source dimensions of the horizon line.\n     */\n    setSourceDimensions(newDimensions) {\n        for (const dimension in newDimensions) {\n            if (dimension !== 'SOURCE_X' && dimension !== 'SOURCE_Y') {\n                if (IS_HIDPI) {\n                    if (dimension !== 'YPOS') {\n                        this.sourceDimensions[dimension] = newDimensions[dimension] * 2;\n                    }\n                }\n                else {\n                    this.sourceDimensions[dimension] = newDimensions[dimension];\n                }\n                this.dimensions[dimension] = newDimensions[dimension];\n            }\n        }\n        this.xPos = [0, newDimensions.WIDTH];\n        this.yPos = newDimensions.YPOS;\n    }\n    /**\n     * Return the crop x position of a type.\n     */\n    getRandomType() {\n        return Math.random() > this.bumpThreshold ? this.dimensions.WIDTH : 0;\n    }\n    /**\n     * Draw the horizon line.\n     */\n    draw() {\n        this.canvasCtx.drawImage(Runner.imageSprite, this.sourceXPos[0], this.spritePos.y, this.sourceDimensions.WIDTH, this.sourceDimensions.HEIGHT, this.xPos[0], this.yPos, this.dimensions.WIDTH, this.dimensions.HEIGHT);\n        this.canvasCtx.drawImage(Runner.imageSprite, this.sourceXPos[1], this.spritePos.y, this.sourceDimensions.WIDTH, this.sourceDimensions.HEIGHT, this.xPos[1], this.yPos, this.dimensions.WIDTH, this.dimensions.HEIGHT);\n    }\n    /**\n     * Update the x position of an individual piece of the line.\n     * @param {number} pos Line position.\n     * @param {number} increment\n     */\n    updateXPos(pos, increment) {\n        const line1 = pos;\n        const line2 = pos === 0 ? 1 : 0;\n        this.xPos[line1] -= increment;\n        this.xPos[line2] = this.xPos[line1] + this.dimensions.WIDTH;\n        if (this.xPos[line1] <= -this.dimensions.WIDTH) {\n            this.xPos[line1] += this.dimensions.WIDTH * 2;\n            this.xPos[line2] = this.xPos[line1] - this.dimensions.WIDTH;\n            this.sourceXPos[line1] = this.getRandomType() + this.spritePos.x;\n        }\n    }\n    /**\n     * Update the horizon line.\n     * @param {number} deltaTime\n     * @param {number} speed\n     */\n    update(deltaTime, speed) {\n        const increment = Math.floor(speed * (FPS / 1000) * deltaTime);\n        if (this.xPos[0] <= 0) {\n            this.updateXPos(0, increment);\n        }\n        else {\n            this.updateXPos(1, increment);\n        }\n        this.draw();\n    }\n    /**\n     * Reset horizon to the starting position.\n     */\n    reset() {\n        this.xPos[0] = 0;\n        this.xPos[1] = this.dimensions.WIDTH;\n    }\n}\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nclass NightMode {\n    /**\n     * Nightmode shows a moon and stars on the horizon.\n     * @param {HTMLCanvasElement} canvas\n     * @param {number} spritePos\n     * @param {number} containerWidth\n     */\n    constructor(canvas, spritePos, containerWidth) {\n        this.spritePos = spritePos;\n        this.canvas = canvas;\n        this.canvasCtx =\n            /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));\n        this.xPos = containerWidth - 50;\n        this.yPos = 30;\n        this.currentPhase = 0;\n        this.opacity = 0;\n        this.containerWidth = containerWidth;\n        this.stars = [];\n        this.drawStars = false;\n        this.placeStars();\n    }\n    /**\n     * Update moving moon, changing phases.\n     * @param {boolean} activated Whether night mode is activated.\n     */\n    update(activated) {\n        // Moon phase.\n        if (activated && this.opacity === 0) {\n            this.currentPhase++;\n            if (this.currentPhase >= NightMode.phases.length) {\n                this.currentPhase = 0;\n            }\n        }\n        // Fade in / out.\n        if (activated && (this.opacity < 1 || this.opacity === 0)) {\n            this.opacity += NightMode.config.FADE_SPEED;\n        }\n        else if (this.opacity > 0) {\n            this.opacity -= NightMode.config.FADE_SPEED;\n        }\n        // Set moon positioning.\n        if (this.opacity > 0) {\n            this.xPos = this.updateXPos(this.xPos, NightMode.config.MOON_SPEED);\n            // Update stars.\n            if (this.drawStars) {\n                for (let i = 0; i < NightMode.config.NUM_STARS; i++) {\n                    this.stars[i].x =\n                        this.updateXPos(this.stars[i].x, NightMode.config.STAR_SPEED);\n                }\n            }\n            this.draw();\n        }\n        else {\n            this.opacity = 0;\n            this.placeStars();\n        }\n        this.drawStars = true;\n    }\n    updateXPos(currentPos, speed) {\n        if (currentPos < -NightMode.config.WIDTH) {\n            currentPos = this.containerWidth;\n        }\n        else {\n            currentPos -= speed;\n        }\n        return currentPos;\n    }\n    draw() {\n        let moonSourceWidth = this.currentPhase === 3 ? NightMode.config.WIDTH * 2 :\n            NightMode.config.WIDTH;\n        let moonSourceHeight = NightMode.config.HEIGHT;\n        let moonSourceX = this.spritePos.x + NightMode.phases[this.currentPhase];\n        const moonOutputWidth = moonSourceWidth;\n        let starSize = NightMode.config.STAR_SIZE;\n        let starSourceX = spriteDefinitionByType.original.LDPI.STAR.x;\n        if (IS_HIDPI) {\n            moonSourceWidth *= 2;\n            moonSourceHeight *= 2;\n            moonSourceX =\n                this.spritePos.x + (NightMode.phases[this.currentPhase] * 2);\n            starSize *= 2;\n            starSourceX = spriteDefinitionByType.original.HDPI.STAR.x;\n        }\n        this.canvasCtx.save();\n        this.canvasCtx.globalAlpha = this.opacity;\n        // Stars.\n        if (this.drawStars) {\n            for (let i = 0; i < NightMode.config.NUM_STARS; i++) {\n                this.canvasCtx.drawImage(Runner.origImageSprite, starSourceX, this.stars[i].sourceY, starSize, starSize, Math.round(this.stars[i].x), this.stars[i].y, NightMode.config.STAR_SIZE, NightMode.config.STAR_SIZE);\n            }\n        }\n        // Moon.\n        this.canvasCtx.drawImage(Runner.origImageSprite, moonSourceX, this.spritePos.y, moonSourceWidth, moonSourceHeight, Math.round(this.xPos), this.yPos, moonOutputWidth, NightMode.config.HEIGHT);\n        this.canvasCtx.globalAlpha = 1;\n        this.canvasCtx.restore();\n    }\n    // Do star placement.\n    placeStars() {\n        const segmentSize = Math.round(this.containerWidth / NightMode.config.NUM_STARS);\n        for (let i = 0; i < NightMode.config.NUM_STARS; i++) {\n            this.stars[i] = {};\n            this.stars[i].x = getRandomNum(segmentSize * i, segmentSize * (i + 1));\n            this.stars[i].y = getRandomNum(0, NightMode.config.STAR_MAX_Y);\n            if (IS_HIDPI) {\n                this.stars[i].sourceY = spriteDefinitionByType.original.HDPI.STAR.y +\n                    NightMode.config.STAR_SIZE * 2 * i;\n            }\n            else {\n                this.stars[i].sourceY = spriteDefinitionByType.original.LDPI.STAR.y +\n                    NightMode.config.STAR_SIZE * i;\n            }\n        }\n    }\n    reset() {\n        this.currentPhase = 0;\n        this.opacity = 0;\n        this.update(false);\n    }\n}\n/**\n * @enum {number}\n */\nNightMode.config = {\n    FADE_SPEED: 0.035,\n    HEIGHT: 40,\n    MOON_SPEED: 0.25,\n    NUM_STARS: 2,\n    STAR_SIZE: 9,\n    STAR_SPEED: 0.3,\n    STAR_MAX_Y: 70,\n    WIDTH: 20,\n};\nNightMode.phases = [140, 120, 100, 60, 40, 20, 0];\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nclass Obstacle {\n    /**\n     * Obstacle.\n     * @param {CanvasRenderingContext2D} canvasCtx\n     * @param {ObstacleType} type\n     * @param {Object} spriteImgPos Obstacle position in sprite.\n     * @param {Object} dimensions\n     * @param {number} gapCoefficient Mutipler in determining the gap.\n     * @param {number} speed\n     * @param {number=} opt_xOffset\n     * @param {boolean=} opt_isAltGameMode\n     */\n    constructor(canvasCtx, type, spriteImgPos, dimensions, gapCoefficient, speed, opt_xOffset, opt_isAltGameMode) {\n        this.canvasCtx = canvasCtx;\n        this.spritePos = spriteImgPos;\n        this.typeConfig = type;\n        this.gapCoefficient = Runner.slowDown ? gapCoefficient * 2 : gapCoefficient;\n        this.size = getRandomNum(1, Obstacle.MAX_OBSTACLE_LENGTH);\n        this.dimensions = dimensions;\n        this.remove = false;\n        this.xPos = dimensions.WIDTH + (opt_xOffset || 0);\n        this.yPos = 0;\n        this.width = 0;\n        this.collisionBoxes = [];\n        this.gap = 0;\n        this.speedOffset = 0;\n        this.altGameModeActive = opt_isAltGameMode;\n        this.imageSprite = this.typeConfig.type === 'COLLECTABLE' ?\n            Runner.altCommonImageSprite :\n            this.altGameModeActive ? Runner.altGameImageSprite :\n                Runner.imageSprite;\n        // For animated obstacles.\n        this.currentFrame = 0;\n        this.timer = 0;\n        this.init(speed);\n    }\n    /**\n     * Initialise the DOM for the obstacle.\n     * @param {number} speed\n     */\n    init(speed) {\n        this.cloneCollisionBoxes();\n        // Only allow sizing if we're at the right speed.\n        if (this.size > 1 && this.typeConfig.multipleSpeed > speed) {\n            this.size = 1;\n        }\n        this.width = this.typeConfig.width * this.size;\n        // Check if obstacle can be positioned at various heights.\n        if (Array.isArray(this.typeConfig.yPos)) {\n            const yPosConfig = IS_MOBILE ? this.typeConfig.yPosMobile : this.typeConfig.yPos;\n            this.yPos = yPosConfig[getRandomNum(0, yPosConfig.length - 1)];\n        }\n        else {\n            this.yPos = this.typeConfig.yPos;\n        }\n        this.draw();\n        // Make collision box adjustments,\n        // Central box is adjusted to the size as one box.\n        //      ____        ______        ________\n        //    _|   |-|    _|     |-|    _|       |-|\n        //   | |<->| |   | |<--->| |   | |<----->| |\n        //   | | 1 | |   | |  2  | |   | |   3   | |\n        //   |_|___|_|   |_|_____|_|   |_|_______|_|\n        //\n        if (this.size > 1) {\n            this.collisionBoxes[1].width = this.width - this.collisionBoxes[0].width -\n                this.collisionBoxes[2].width;\n            this.collisionBoxes[2].x = this.width - this.collisionBoxes[2].width;\n        }\n        // For obstacles that go at a different speed from the horizon.\n        if (this.typeConfig.speedOffset) {\n            this.speedOffset = Math.random() > 0.5 ? this.typeConfig.speedOffset :\n                -this.typeConfig.speedOffset;\n        }\n        this.gap = this.getGap(this.gapCoefficient, speed);\n        // Increase gap for audio cues enabled.\n        if (Runner.audioCues) {\n            this.gap *= 2;\n        }\n    }\n    /**\n     * Draw and crop based on size.\n     */\n    draw() {\n        let sourceWidth = this.typeConfig.width;\n        let sourceHeight = this.typeConfig.height;\n        if (IS_HIDPI) {\n            sourceWidth = sourceWidth * 2;\n            sourceHeight = sourceHeight * 2;\n        }\n        // X position in sprite.\n        let sourceX = (sourceWidth * this.size) * (0.5 * (this.size - 1)) + this.spritePos.x;\n        // Animation frames.\n        if (this.currentFrame > 0) {\n            sourceX += sourceWidth * this.currentFrame;\n        }\n        this.canvasCtx.drawImage(this.imageSprite, sourceX, this.spritePos.y, sourceWidth * this.size, sourceHeight, this.xPos, this.yPos, this.typeConfig.width * this.size, this.typeConfig.height);\n    }\n    /**\n     * Obstacle frame update.\n     * @param {number} deltaTime\n     * @param {number} speed\n     */\n    update(deltaTime, speed) {\n        if (!this.remove) {\n            if (this.typeConfig.speedOffset) {\n                speed += this.speedOffset;\n            }\n            this.xPos -= Math.floor((speed * FPS / 1000) * deltaTime);\n            // Update frame\n            if (this.typeConfig.numFrames) {\n                this.timer += deltaTime;\n                if (this.timer >= this.typeConfig.frameRate) {\n                    this.currentFrame =\n                        this.currentFrame === this.typeConfig.numFrames - 1 ?\n                            0 :\n                            this.currentFrame + 1;\n                    this.timer = 0;\n                }\n            }\n            this.draw();\n            if (!this.isVisible()) {\n                this.remove = true;\n            }\n        }\n    }\n    /**\n     * Calculate a random gap size.\n     * - Minimum gap gets wider as speed increases\n     * @param {number} gapCoefficient\n     * @param {number} speed\n     * @return {number} The gap size.\n     */\n    getGap(gapCoefficient, speed) {\n        const minGap = Math.round(this.width * speed + this.typeConfig.minGap * gapCoefficient);\n        const maxGap = Math.round(minGap * Obstacle.MAX_GAP_COEFFICIENT);\n        return getRandomNum(minGap, maxGap);\n    }\n    /**\n     * Check if obstacle is visible.\n     * @return {boolean} Whether the obstacle is in the game area.\n     */\n    isVisible() {\n        return this.xPos + this.width > 0;\n    }\n    /**\n     * Make a copy of the collision boxes, since these will change based on\n     * obstacle type and size.\n     */\n    cloneCollisionBoxes() {\n        const collisionBoxes = this.typeConfig.collisionBoxes;\n        for (let i = collisionBoxes.length - 1; i >= 0; i--) {\n            this.collisionBoxes[i] = new CollisionBox(collisionBoxes[i].x, collisionBoxes[i].y, collisionBoxes[i].width, collisionBoxes[i].height);\n        }\n    }\n}\n/**\n * Coefficient for calculating the maximum gap.\n */\nObstacle.MAX_GAP_COEFFICIENT = 1.5;\n/**\n * Maximum obstacle grouping count.\n */\nObstacle.MAX_OBSTACLE_LENGTH = 3;\n\n// Copyright 2024 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n/**\n * Horizon background class.\n */\nclass Horizon {\n    /**\n     * @param {HTMLCanvasElement} canvas\n     * @param {Object} spritePos Sprite positioning.\n     * @param {Object} dimensions Canvas dimensions.\n     * @param {number} gapCoefficient\n     */\n    constructor(canvas, spritePos, dimensions, gapCoefficient) {\n        this.canvas = canvas;\n        this.canvasCtx =\n            /** @type {CanvasRenderingContext2D} */ (this.canvas.getContext('2d'));\n        this.config = Horizon.config;\n        this.dimensions = dimensions;\n        this.gapCoefficient = gapCoefficient;\n        this.obstacles = [];\n        this.obstacleHistory = [];\n        this.horizonOffsets = [0, 0];\n        this.cloudFrequency = this.config.CLOUD_FREQUENCY;\n        this.spritePos = spritePos;\n        this.nightMode = null;\n        this.altGameModeActive = false;\n        // Cloud\n        this.clouds = [];\n        this.cloudSpeed = this.config.BG_CLOUD_SPEED;\n        // Background elements\n        this.backgroundEls = [];\n        this.lastEl = null;\n        this.backgroundSpeed = this.config.BG_CLOUD_SPEED;\n        // Horizon\n        this.horizonLine = null;\n        this.horizonLines = [];\n        this.init();\n    }\n    /**\n     * Initialise the horizon. Just add the line and a cloud. No obstacles.\n     */\n    init() {\n        Obstacle.types = spriteDefinitionByType.original.OBSTACLES;\n        this.addCloud();\n        // Multiple Horizon lines\n        for (let i = 0; i < Runner.spriteDefinition.LINES.length; i++) {\n            this.horizonLines.push(new HorizonLine(this.canvas, Runner.spriteDefinition.LINES[i]));\n        }\n        this.nightMode =\n            new NightMode(this.canvas, this.spritePos.MOON, this.dimensions.WIDTH);\n    }\n    /**\n     * Update obstacle definitions based on the speed of the game.\n     */\n    adjustObstacleSpeed() {\n        for (let i = 0; i < Obstacle.types.length; i++) {\n            if (Runner.slowDown) {\n                Obstacle.types[i].multipleSpeed = Obstacle.types[i].multipleSpeed / 2;\n                Obstacle.types[i].minGap *= 1.5;\n                Obstacle.types[i].minSpeed = Obstacle.types[i].minSpeed / 2;\n                // Convert variable y position obstacles to fixed.\n                if (typeof (Obstacle.types[i].yPos) === 'object') {\n                    Obstacle.types[i].yPos = Obstacle.types[i].yPos[0];\n                    Obstacle.types[i].yPosMobile = Obstacle.types[i].yPos[0];\n                }\n            }\n        }\n    }\n    /**\n     * Update sprites to correspond to change in sprite sheet.\n     * @param {number} spritePos\n     */\n    enableAltGameMode(spritePos) {\n        // Clear existing horizon objects.\n        this.clouds = [];\n        this.backgroundEls = [];\n        this.altGameModeActive = true;\n        this.spritePos = spritePos;\n        Obstacle.types = Runner.spriteDefinition.OBSTACLES;\n        this.adjustObstacleSpeed();\n        Obstacle.MAX_GAP_COEFFICIENT = Runner.spriteDefinition.MAX_GAP_COEFFICIENT;\n        Obstacle.MAX_OBSTACLE_LENGTH = Runner.spriteDefinition.MAX_OBSTACLE_LENGTH;\n        BackgroundEl.config = Runner.spriteDefinition.BACKGROUND_EL_CONFIG;\n        this.horizonLines = [];\n        for (let i = 0; i < Runner.spriteDefinition.LINES.length; i++) {\n            this.horizonLines.push(new HorizonLine(this.canvas, Runner.spriteDefinition.LINES[i]));\n        }\n        this.reset();\n    }\n    /**\n     * @param {number} deltaTime\n     * @param {number} currentSpeed\n     * @param {boolean} updateObstacles Used as an override to prevent\n     *     the obstacles from being updated / added. This happens in the\n     *     ease in section.\n     * @param {boolean} showNightMode Night mode activated.\n     */\n    update(deltaTime, currentSpeed, updateObstacles, showNightMode) {\n        this.runningTime += deltaTime;\n        if (this.altGameModeActive) {\n            this.updateBackgroundEls(deltaTime, currentSpeed);\n        }\n        for (let i = 0; i < this.horizonLines.length; i++) {\n            this.horizonLines[i].update(deltaTime, currentSpeed);\n        }\n        if (!this.altGameModeActive || Runner.spriteDefinition.HAS_CLOUDS) {\n            this.nightMode.update(showNightMode);\n            this.updateClouds(deltaTime, currentSpeed);\n        }\n        if (updateObstacles) {\n            this.updateObstacles(deltaTime, currentSpeed);\n        }\n    }\n    /**\n     * Update background element positions. Also handles creating new elements.\n     * @param {number} elSpeed\n     * @param {Array<Object>} bgElArray\n     * @param {number} maxBgEl\n     * @param {Function} bgElAddFunction\n     * @param {number} frequency\n     */\n    updateBackgroundEl(elSpeed, bgElArray, maxBgEl, bgElAddFunction, frequency) {\n        const numElements = bgElArray.length;\n        if (numElements) {\n            for (let i = numElements - 1; i >= 0; i--) {\n                bgElArray[i].update(elSpeed);\n            }\n            const lastEl = bgElArray[numElements - 1];\n            // Check for adding a new element.\n            if (numElements < maxBgEl &&\n                (this.dimensions.WIDTH - lastEl.xPos) > lastEl.gap &&\n                frequency > Math.random()) {\n                bgElAddFunction();\n            }\n        }\n        else {\n            bgElAddFunction();\n        }\n    }\n    /**\n     * Update the cloud positions.\n     * @param {number} deltaTime\n     * @param {number} speed\n     */\n    updateClouds(deltaTime, speed) {\n        const elSpeed = this.cloudSpeed / 1000 * deltaTime * speed;\n        this.updateBackgroundEl(elSpeed, this.clouds, this.config.MAX_CLOUDS, this.addCloud.bind(this), this.cloudFrequency);\n        // Remove expired elements.\n        this.clouds = this.clouds.filter((obj) => !obj.remove);\n    }\n    /**\n     * Update the background element positions.\n     * @param {number} deltaTime\n     * @param {number} speed\n     */\n    updateBackgroundEls(deltaTime, speed) {\n        this.updateBackgroundEl(deltaTime, this.backgroundEls, BackgroundEl.config.MAX_BG_ELS, this.addBackgroundEl.bind(this), this.cloudFrequency);\n        // Remove expired elements.\n        this.backgroundEls = this.backgroundEls.filter((obj) => !obj.remove);\n    }\n    /**\n     * Update the obstacle positions.\n     * @param {number} deltaTime\n     * @param {number} currentSpeed\n     */\n    updateObstacles(deltaTime, currentSpeed) {\n        const updatedObstacles = this.obstacles.slice(0);\n        for (let i = 0; i < this.obstacles.length; i++) {\n            const obstacle = this.obstacles[i];\n            obstacle.update(deltaTime, currentSpeed);\n            // Clean up existing obstacles.\n            if (obstacle.remove) {\n                updatedObstacles.shift();\n            }\n        }\n        this.obstacles = updatedObstacles;\n        if (this.obstacles.length > 0) {\n            const lastObstacle = this.obstacles[this.obstacles.length - 1];\n            if (lastObstacle && !lastObstacle.followingObstacleCreated &&\n                lastObstacle.isVisible() &&\n                (lastObstacle.xPos + lastObstacle.width + lastObstacle.gap) <\n                    this.dimensions.WIDTH) {\n                this.addNewObstacle(currentSpeed);\n                lastObstacle.followingObstacleCreated = true;\n            }\n        }\n        else {\n            // Create new obstacles.\n            this.addNewObstacle(currentSpeed);\n        }\n    }\n    removeFirstObstacle() {\n        this.obstacles.shift();\n    }\n    /**\n     * Add a new obstacle.\n     * @param {number} currentSpeed\n     */\n    addNewObstacle(currentSpeed) {\n        const obstacleCount = Obstacle.types[Obstacle.types.length - 1].type !== 'COLLECTABLE' ||\n            (Runner.isAltGameModeEnabled() && !this.altGameModeActive ||\n                this.altGameModeActive) ?\n            Obstacle.types.length - 1 :\n            Obstacle.types.length - 2;\n        const obstacleTypeIndex = obstacleCount > 0 ? getRandomNum(0, obstacleCount) : 0;\n        const obstacleType = Obstacle.types[obstacleTypeIndex];\n        // Check for multiples of the same type of obstacle.\n        // Also check obstacle is available at current speed.\n        if ((obstacleCount > 0 && this.duplicateObstacleCheck(obstacleType.type)) ||\n            currentSpeed < obstacleType.minSpeed) {\n            this.addNewObstacle(currentSpeed);\n        }\n        else {\n            const obstacleSpritePos = this.spritePos[obstacleType.type];\n            this.obstacles.push(new Obstacle(this.canvasCtx, obstacleType, obstacleSpritePos, this.dimensions, this.gapCoefficient, currentSpeed, obstacleType.width, this.altGameModeActive));\n            this.obstacleHistory.unshift(obstacleType.type);\n            if (this.obstacleHistory.length > 1) {\n                this.obstacleHistory.splice(Runner.config.MAX_OBSTACLE_DUPLICATION);\n            }\n        }\n    }\n    /**\n     * Returns whether the previous two obstacles are the same as the next one.\n     * Maximum duplication is set in config value MAX_OBSTACLE_DUPLICATION.\n     * @return {boolean}\n     */\n    duplicateObstacleCheck(nextObstacleType) {\n        let duplicateCount = 0;\n        for (let i = 0; i < this.obstacleHistory.length; i++) {\n            duplicateCount =\n                this.obstacleHistory[i] === nextObstacleType ? duplicateCount + 1 : 0;\n        }\n        return duplicateCount >= Runner.config.MAX_OBSTACLE_DUPLICATION;\n    }\n    /**\n     * Reset the horizon layer.\n     * Remove existing obstacles and reposition the horizon line.\n     */\n    reset() {\n        this.obstacles = [];\n        for (let l = 0; l < this.horizonLines.length; l++) {\n            this.horizonLines[l].reset();\n        }\n        this.nightMode.reset();\n    }\n    /**\n     * Update the canvas width and scaling.\n     * @param {number} width Canvas width.\n     * @param {number} height Canvas height.\n     */\n    resize(width, height) {\n        this.canvas.width = width;\n        this.canvas.height = height;\n    }\n    /**\n     * Add a new cloud to the horizon.\n     */\n    addCloud() {\n        this.clouds.push(new Cloud(this.canvas, this.spritePos.CLOUD, this.dimensions.WIDTH));\n    }\n    /**\n     * Add a random background element to the horizon.\n     */\n    addBackgroundEl() {\n        const backgroundElTypes = Object.keys(Runner.spriteDefinition.BACKGROUND_EL);\n        if (backgroundElTypes.length > 0) {\n            let index = getRandomNum(0, backgroundElTypes.length - 1);\n            let type = backgroundElTypes[index];\n            // Add variation if available.\n            while (type === this.lastEl && backgroundElTypes.length > 1) {\n                index = getRandomNum(0, backgroundElTypes.length - 1);\n                type = backgroundElTypes[index];\n            }\n            this.lastEl = type;\n            this.backgroundEls.push(new BackgroundEl(this.canvas, this.spritePos.BACKGROUND_EL, this.dimensions.WIDTH, type));\n        }\n    }\n}\n/**\n * Horizon config.\n * @enum {number}\n */\nHorizon.config = {\n    BG_CLOUD_SPEED: 0.2,\n    BUMPY_THRESHOLD: .3,\n    CLOUD_FREQUENCY: .5,\n    HORIZON_HEIGHT: 16,\n    MAX_CLOUDS: 6,\n};\n\n// Copyright 2014 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n/**\n * T-Rex runner.\n * @param {string} outerContainerId Outer containing element id.\n * @param {!Object=} opt_config\n * @constructor\n * @implements {EventListener}\n * @export\n */\nfunction Runner(outerContainerId, opt_config) {\n    // Singleton\n    if (Runner.instance_) {\n        return Runner.instance_;\n    }\n    Runner.instance_ = this;\n    this.outerContainerEl = document.querySelector(outerContainerId);\n    this.containerEl = null;\n    this.snackbarEl = null;\n    // A div to intercept touch events. Only set while (playing && useTouch).\n    this.touchController = null;\n    this.config = opt_config || Object.assign(Runner.config, Runner.normalConfig);\n    // Logical dimensions of the container.\n    this.dimensions = Runner.defaultDimensions;\n    this.gameType = null;\n    Runner.spriteDefinition = spriteDefinitionByType['original'];\n    this.altGameImageSprite = null;\n    this.altGameModeActive = false;\n    this.altGameModeFlashTimer = null;\n    this.fadeInTimer = 0;\n    this.canvas = null;\n    this.canvasCtx = null;\n    this.tRex = null;\n    this.distanceMeter = null;\n    this.distanceRan = 0;\n    this.highestScore = 0;\n    this.syncHighestScore = false;\n    this.time = 0;\n    this.runningTime = 0;\n    this.msPerFrame = 1000 / FPS;\n    this.currentSpeed = this.config.SPEED;\n    Runner.slowDown = false;\n    this.obstacles = [];\n    this.activated = false; // Whether the easter egg has been activated.\n    this.playing = false; // Whether the game is currently in play state.\n    this.crashed = false;\n    this.paused = false;\n    this.inverted = false;\n    this.invertTimer = 0;\n    this.resizeTimerId_ = null;\n    this.playCount = 0;\n    // Sound FX.\n    this.audioBuffer = null;\n    /** @type {Object} */\n    this.soundFx = {};\n    this.generatedSoundFx = null;\n    // Global web audio context for playing sounds.\n    this.audioContext = null;\n    // Images.\n    this.images = {};\n    this.imagesLoaded = 0;\n    // Gamepad state.\n    this.pollingGamepads = false;\n    this.gamepadIndex = undefined;\n    this.previousGamepad = null;\n    if (this.isDisabled()) {\n        this.setupDisabledRunner();\n    }\n    else {\n        if (Runner.isAltGameModeEnabled()) {\n            this.initAltGameType();\n            Runner.gameType = this.gameType;\n        }\n        this.loadImages();\n        window['initializeEasterEggHighScore'] =\n            this.initializeHighScore.bind(this);\n    }\n}\n/**\n * Default game width.\n * @const\n */\nconst DEFAULT_WIDTH = 600;\n/** @const */\nconst ARCADE_MODE_URL = 'chrome://dino/';\n/** @const */\nconst RESOURCE_POSTFIX = 'offline-resources-';\n/** @const */\nconst A11Y_STRINGS = {\n    ariaLabel: 'dinoGameA11yAriaLabel',\n    description: 'dinoGameA11yDescription',\n    gameOver: 'dinoGameA11yGameOver',\n    highScore: 'dinoGameA11yHighScore',\n    jump: 'dinoGameA11yJump',\n    started: 'dinoGameA11yStartGame',\n    speedLabel: 'dinoGameA11ySpeedToggle',\n};\n/**\n * Default game configuration.\n * Shared config for all  versions of the game. Additional parameters are\n * defined in Runner.normalConfig and Runner.slowConfig.\n */\nRunner.config = {\n    AUDIOCUE_PROXIMITY_THRESHOLD: 190,\n    AUDIOCUE_PROXIMITY_THRESHOLD_MOBILE_A11Y: 250,\n    BG_CLOUD_SPEED: 0.2,\n    BOTTOM_PAD: 10,\n    // Scroll Y threshold at which the game can be activated.\n    CANVAS_IN_VIEW_OFFSET: -10,\n    CLEAR_TIME: 3000,\n    CLOUD_FREQUENCY: 0.5,\n    FADE_DURATION: 1,\n    FLASH_DURATION: 1000,\n    GAMEOVER_CLEAR_TIME: 1200,\n    INITIAL_JUMP_VELOCITY: 12,\n    INVERT_FADE_DURATION: 12000,\n    MAX_BLINK_COUNT: 3,\n    MAX_CLOUDS: 6,\n    MAX_OBSTACLE_LENGTH: 3,\n    MAX_OBSTACLE_DUPLICATION: 2,\n    RESOURCE_TEMPLATE_ID: 'audio-resources',\n    SPEED: 6,\n    SPEED_DROP_COEFFICIENT: 3,\n    ARCADE_MODE_INITIAL_TOP_POSITION: 35,\n    ARCADE_MODE_TOP_POSITION_PERCENT: 0.1,\n};\nRunner.normalConfig = {\n    ACCELERATION: 0.001,\n    AUDIOCUE_PROXIMITY_THRESHOLD: 190,\n    AUDIOCUE_PROXIMITY_THRESHOLD_MOBILE_A11Y: 250,\n    GAP_COEFFICIENT: 0.6,\n    INVERT_DISTANCE: 700,\n    MAX_SPEED: 13,\n    MOBILE_SPEED_COEFFICIENT: 1.2,\n    SPEED: 6,\n};\nRunner.slowConfig = {\n    ACCELERATION: 0.0005,\n    AUDIOCUE_PROXIMITY_THRESHOLD: 170,\n    AUDIOCUE_PROXIMITY_THRESHOLD_MOBILE_A11Y: 220,\n    GAP_COEFFICIENT: 0.3,\n    INVERT_DISTANCE: 350,\n    MAX_SPEED: 9,\n    MOBILE_SPEED_COEFFICIENT: 1.5,\n    SPEED: 4.2,\n};\n/**\n * Default dimensions.\n */\nRunner.defaultDimensions = {\n    WIDTH: DEFAULT_WIDTH,\n    HEIGHT: 150,\n};\n/**\n * CSS class names.\n * @enum {string}\n */\nRunner.classes = {\n    ARCADE_MODE: 'arcade-mode',\n    CANVAS: 'runner-canvas',\n    CONTAINER: 'runner-container',\n    CRASHED: 'crashed',\n    ICON: 'icon-offline',\n    INVERTED: 'inverted',\n    SNACKBAR: 'snackbar',\n    SNACKBAR_SHOW: 'snackbar-show',\n    TOUCH_CONTROLLER: 'controller',\n};\n/**\n * Sound FX. Reference to the ID of the audio tag on interstitial page.\n * @enum {string}\n */\nRunner.sounds = {\n    BUTTON_PRESS: 'offline-sound-press',\n    HIT: 'offline-sound-hit',\n    SCORE: 'offline-sound-reached',\n};\n/**\n * Key code mapping.\n * @enum {Object}\n */\nRunner.keycodes = {\n    JUMP: { '38': 1, '32': 1 }, // Up, spacebar\n    DUCK: { '40': 1 }, // Down\n    RESTART: { '13': 1 }, // Enter\n};\n/**\n * Runner event names.\n * @enum {string}\n */\nRunner.events = {\n    ANIM_END: 'webkitAnimationEnd',\n    CLICK: 'click',\n    KEYDOWN: 'keydown',\n    KEYUP: 'keyup',\n    POINTERDOWN: 'pointerdown',\n    POINTERUP: 'pointerup',\n    RESIZE: 'resize',\n    TOUCHEND: 'touchend',\n    TOUCHSTART: 'touchstart',\n    VISIBILITY: 'visibilitychange',\n    BLUR: 'blur',\n    FOCUS: 'focus',\n    LOAD: 'load',\n    GAMEPADCONNECTED: 'gamepadconnected',\n};\nRunner.prototype = {\n    /**\n     * Initialize alternative game type.\n     */\n    initAltGameType() {\n        if (GAME_TYPE.length > 0) {\n            this.gameType = loadTimeData && loadTimeData.valueExists('altGameType') ?\n                GAME_TYPE[parseInt(loadTimeData.getValue('altGameType'), 10) - 1] :\n                '';\n        }\n    },\n    /**\n     * Whether the easter egg has been disabled. CrOS enterprise enrolled devices.\n     * @return {boolean}\n     */\n    isDisabled() {\n        return loadTimeData && loadTimeData.valueExists('disabledEasterEgg');\n    },\n    /**\n     * For disabled instances, set up a snackbar with the disabled message.\n     */\n    setupDisabledRunner() {\n        this.containerEl = document.createElement('div');\n        this.containerEl.className = Runner.classes.SNACKBAR;\n        this.containerEl.textContent = loadTimeData.getValue('disabledEasterEgg');\n        this.outerContainerEl.appendChild(this.containerEl);\n        // Show notification when the activation key is pressed.\n        document.addEventListener(Runner.events.KEYDOWN, function (e) {\n            if (Runner.keycodes.JUMP[e.keyCode]) {\n                this.containerEl.classList.add(Runner.classes.SNACKBAR_SHOW);\n                document.querySelector('.icon').classList.add('icon-disabled');\n            }\n        }.bind(this));\n    },\n    /**\n     * Setting individual settings for debugging.\n     * @param {string} setting\n     * @param {number|string} value\n     */\n    updateConfigSetting(setting, value) {\n        if (setting in this.config && value !== undefined) {\n            this.config[setting] = value;\n            switch (setting) {\n                case 'GRAVITY':\n                case 'MIN_JUMP_HEIGHT':\n                case 'SPEED_DROP_COEFFICIENT':\n                    this.tRex.config[setting] = value;\n                    break;\n                case 'INITIAL_JUMP_VELOCITY':\n                    this.tRex.setJumpVelocity(value);\n                    break;\n                case 'SPEED':\n                    this.setSpeed(/** @type {number} */ (value));\n                    break;\n            }\n        }\n    },\n    /**\n     * Creates an on page image element from the base 64 encoded string source.\n     * @param {string} resourceName Name in data object,\n     * @return {HTMLImageElement} The created element.\n     */\n    createImageElement(resourceName) {\n        const imgSrc = loadTimeData && loadTimeData.valueExists(resourceName) ?\n            loadTimeData.getString(resourceName) :\n            null;\n        if (imgSrc) {\n            const el = \n            /** @type {HTMLImageElement} */ (document.createElement('img'));\n            el.id = resourceName;\n            el.src = imgSrc;\n            document.getElementById('offline-resources').appendChild(el);\n            return el;\n        }\n        return null;\n    },\n    /**\n     * Cache the appropriate image sprite from the page and get the sprite sheet\n     * definition.\n     */\n    loadImages() {\n        let scale = '1x';\n        this.spriteDef = Runner.spriteDefinition.LDPI;\n        if (IS_HIDPI) {\n            scale = '2x';\n            this.spriteDef = Runner.spriteDefinition.HDPI;\n        }\n        Runner.imageSprite = /** @type {HTMLImageElement} */\n            (document.getElementById(RESOURCE_POSTFIX + scale));\n        if (this.gameType) {\n            Runner.altGameImageSprite = /** @type {HTMLImageElement} */\n                (this.createImageElement('altGameSpecificImage' + scale));\n            Runner.altCommonImageSprite = /** @type {HTMLImageElement} */\n                (this.createImageElement('altGameCommonImage' + scale));\n        }\n        Runner.origImageSprite = Runner.imageSprite;\n        // Disable the alt game mode if the sprites can't be loaded.\n        if (!Runner.altGameImageSprite || !Runner.altCommonImageSprite) {\n            Runner.isAltGameModeEnabled = () => false;\n            this.altGameModeActive = false;\n        }\n        if (Runner.imageSprite.complete) {\n            this.init();\n        }\n        else {\n            // If the images are not yet loaded, add a listener.\n            Runner.imageSprite.addEventListener(Runner.events.LOAD, this.init.bind(this));\n        }\n    },\n    /**\n     * Load and decode base 64 encoded sounds.\n     */\n    loadSounds() {\n        if (!IS_IOS) {\n            this.audioContext = new AudioContext();\n            const resourceTemplate = document.getElementById(this.config.RESOURCE_TEMPLATE_ID).content;\n            for (const sound in Runner.sounds) {\n                let soundSrc = resourceTemplate.getElementById(Runner.sounds[sound]).src;\n                soundSrc = soundSrc.substr(soundSrc.indexOf(',') + 1);\n                const buffer = decodeBase64ToArrayBuffer(soundSrc);\n                // Async, so no guarantee of order in array.\n                this.audioContext.decodeAudioData(buffer, function (index, audioData) {\n                    this.soundFx[index] = audioData;\n                }.bind(this, sound));\n            }\n        }\n    },\n    /**\n     * Sets the game speed. Adjust the speed accordingly if on a smaller screen.\n     * @param {number=} opt_speed\n     */\n    setSpeed(opt_speed) {\n        const speed = opt_speed || this.currentSpeed;\n        // Reduce the speed on smaller mobile screens.\n        if (this.dimensions.WIDTH < DEFAULT_WIDTH) {\n            const mobileSpeed = Runner.slowDown ? speed :\n                speed * this.dimensions.WIDTH /\n                    DEFAULT_WIDTH * this.config.MOBILE_SPEED_COEFFICIENT;\n            this.currentSpeed = mobileSpeed > speed ? speed : mobileSpeed;\n        }\n        else if (opt_speed) {\n            this.currentSpeed = opt_speed;\n        }\n    },\n    /**\n     * Game initialiser.\n     */\n    init() {\n        // Hide the static icon.\n        document.querySelector('.' + Runner.classes.ICON).style.visibility =\n            'hidden';\n        if (this.isArcadeMode()) {\n            document.title =\n                document.title + ' - ' + getA11yString(A11Y_STRINGS.ariaLabel);\n        }\n        this.adjustDimensions();\n        this.setSpeed();\n        const ariaLabel = getA11yString(A11Y_STRINGS.ariaLabel);\n        this.containerEl = document.createElement('div');\n        this.containerEl.setAttribute('role', IS_MOBILE ? 'button' : 'application');\n        this.containerEl.setAttribute('tabindex', '0');\n        this.containerEl.setAttribute('title', getA11yString(A11Y_STRINGS.description));\n        this.containerEl.setAttribute('aria-label', ariaLabel);\n        this.containerEl.className = Runner.classes.CONTAINER;\n        // Player canvas container.\n        this.canvas = createCanvas(this.containerEl, this.dimensions.WIDTH, this.dimensions.HEIGHT);\n        // Live region for game status updates.\n        this.a11yStatusEl = document.createElement('span');\n        this.a11yStatusEl.className = 'offline-runner-live-region';\n        this.a11yStatusEl.setAttribute('aria-live', 'assertive');\n        this.a11yStatusEl.textContent = '';\n        Runner.a11yStatusEl = this.a11yStatusEl;\n        // Add checkbox to slow down the game.\n        this.slowSpeedCheckboxLabel = document.createElement('label');\n        this.slowSpeedCheckboxLabel.className = 'slow-speed-option hidden';\n        this.slowSpeedCheckboxLabel.textContent =\n            getA11yString(A11Y_STRINGS.speedLabel);\n        this.slowSpeedCheckbox = document.createElement('input');\n        this.slowSpeedCheckbox.setAttribute('type', 'checkbox');\n        this.slowSpeedCheckbox.setAttribute('title', getA11yString(A11Y_STRINGS.speedLabel));\n        this.slowSpeedCheckbox.setAttribute('tabindex', '0');\n        this.slowSpeedCheckbox.setAttribute('checked', 'checked');\n        this.slowSpeedToggleEl = document.createElement('span');\n        this.slowSpeedToggleEl.className = 'slow-speed-toggle';\n        this.slowSpeedCheckboxLabel.appendChild(this.slowSpeedCheckbox);\n        this.slowSpeedCheckboxLabel.appendChild(this.slowSpeedToggleEl);\n        if (IS_IOS) {\n            this.outerContainerEl.appendChild(this.a11yStatusEl);\n        }\n        else {\n            this.containerEl.appendChild(this.a11yStatusEl);\n        }\n        this.generatedSoundFx = new GeneratedSoundFx();\n        this.canvasCtx =\n            /** @type {CanvasRenderingContext2D} */ (this.canvas.getContext('2d'));\n        this.canvasCtx.fillStyle = '#f7f7f7';\n        this.canvasCtx.fill();\n        Runner.updateCanvasScaling(this.canvas);\n        // Horizon contains clouds, obstacles and the ground.\n        this.horizon = new Horizon(this.canvas, this.spriteDef, this.dimensions, this.config.GAP_COEFFICIENT);\n        // Distance meter\n        this.distanceMeter = new DistanceMeter(this.canvas, this.spriteDef.TEXT_SPRITE, this.dimensions.WIDTH);\n        // Draw t-rex\n        this.tRex = new Trex(this.canvas, this.spriteDef.TREX);\n        this.outerContainerEl.appendChild(this.containerEl);\n        this.outerContainerEl.appendChild(this.slowSpeedCheckboxLabel);\n        this.startListening();\n        this.update();\n        window.addEventListener(Runner.events.RESIZE, this.debounceResize.bind(this));\n        // Handle dark mode\n        const darkModeMediaQuery = window.matchMedia('(prefers-color-scheme: dark)');\n        this.isDarkMode = darkModeMediaQuery && darkModeMediaQuery.matches;\n        darkModeMediaQuery.addListener((e) => {\n            this.isDarkMode = e.matches;\n        });\n    },\n    /**\n     * Create the touch controller. A div that covers whole screen.\n     */\n    createTouchController() {\n        this.touchController = document.createElement('div');\n        this.touchController.className = Runner.classes.TOUCH_CONTROLLER;\n        this.touchController.addEventListener(Runner.events.TOUCHSTART, this);\n        this.touchController.addEventListener(Runner.events.TOUCHEND, this);\n        this.outerContainerEl.appendChild(this.touchController);\n    },\n    /**\n     * Debounce the resize event.\n     */\n    debounceResize() {\n        if (!this.resizeTimerId_) {\n            this.resizeTimerId_ = setInterval(this.adjustDimensions.bind(this), 250);\n        }\n    },\n    /**\n     * Adjust game space dimensions on resize.\n     */\n    adjustDimensions() {\n        clearInterval(this.resizeTimerId_);\n        this.resizeTimerId_ = null;\n        const boxStyles = window.getComputedStyle(this.outerContainerEl);\n        const padding = Number(boxStyles.paddingLeft.substr(0, boxStyles.paddingLeft.length - 2));\n        this.dimensions.WIDTH = this.outerContainerEl.offsetWidth - padding * 2;\n        if (this.isArcadeMode()) {\n            this.dimensions.WIDTH = Math.min(DEFAULT_WIDTH, this.dimensions.WIDTH);\n            if (this.activated) {\n                this.setArcadeModeContainerScale();\n            }\n        }\n        // Redraw the elements back onto the canvas.\n        if (this.canvas) {\n            this.canvas.width = this.dimensions.WIDTH;\n            this.canvas.height = this.dimensions.HEIGHT;\n            Runner.updateCanvasScaling(this.canvas);\n            this.distanceMeter.calcXPos(this.dimensions.WIDTH);\n            this.clearCanvas();\n            this.horizon.update(0, 0, true);\n            this.tRex.update(0);\n            // Outer container and distance meter.\n            if (this.playing || this.crashed || this.paused) {\n                this.containerEl.style.width = this.dimensions.WIDTH + 'px';\n                this.containerEl.style.height = this.dimensions.HEIGHT + 'px';\n                this.distanceMeter.update(0, Math.ceil(this.distanceRan));\n                this.stop();\n            }\n            else {\n                this.tRex.draw(0, 0);\n            }\n            // Game over panel.\n            if (this.crashed && this.gameOverPanel) {\n                this.gameOverPanel.updateDimensions(this.dimensions.WIDTH);\n                this.gameOverPanel.draw(this.altGameModeActive, this.tRex);\n            }\n        }\n    },\n    /**\n     * Play the game intro.\n     * Canvas container width expands out to the full width.\n     */\n    playIntro() {\n        if (!this.activated && !this.crashed) {\n            this.playingIntro = true;\n            this.tRex.playingIntro = true;\n            // CSS animation definition.\n            const keyframes = '@-webkit-keyframes intro { ' +\n                'from { width:' + Trex.config.WIDTH + 'px }' +\n                'to { width: ' + this.dimensions.WIDTH + 'px }' +\n                '}';\n            document.styleSheets[0].insertRule(keyframes, 0);\n            this.containerEl.addEventListener(Runner.events.ANIM_END, this.startGame.bind(this));\n            this.containerEl.style.webkitAnimation = 'intro .4s ease-out 1 both';\n            this.containerEl.style.width = this.dimensions.WIDTH + 'px';\n            this.setPlayStatus(true);\n            this.activated = true;\n        }\n        else if (this.crashed) {\n            this.restart();\n        }\n    },\n    /**\n     * Update the game status to started.\n     */\n    startGame() {\n        if (this.isArcadeMode()) {\n            this.setArcadeMode();\n        }\n        this.toggleSpeed();\n        this.runningTime = 0;\n        this.playingIntro = false;\n        this.tRex.playingIntro = false;\n        this.containerEl.style.webkitAnimation = '';\n        this.playCount++;\n        this.generatedSoundFx.background();\n        if (Runner.audioCues) {\n            this.containerEl.setAttribute('title', getA11yString(A11Y_STRINGS.jump));\n        }\n        // Handle tabbing off the page. Pause the current game.\n        document.addEventListener(Runner.events.VISIBILITY, this.onVisibilityChange.bind(this));\n        window.addEventListener(Runner.events.BLUR, this.onVisibilityChange.bind(this));\n        window.addEventListener(Runner.events.FOCUS, this.onVisibilityChange.bind(this));\n    },\n    clearCanvas() {\n        this.canvasCtx.clearRect(0, 0, this.dimensions.WIDTH, this.dimensions.HEIGHT);\n    },\n    /**\n     * Checks whether the canvas area is in the viewport of the browser\n     * through the current scroll position.\n     * @return boolean.\n     */\n    isCanvasInView() {\n        return this.containerEl.getBoundingClientRect().top >\n            Runner.config.CANVAS_IN_VIEW_OFFSET;\n    },\n    /**\n     * Enable the alt game mode. Switching out the sprites.\n     */\n    enableAltGameMode() {\n        Runner.imageSprite = Runner.altGameImageSprite;\n        Runner.spriteDefinition = spriteDefinitionByType[Runner.gameType];\n        if (IS_HIDPI) {\n            this.spriteDef = Runner.spriteDefinition.HDPI;\n        }\n        else {\n            this.spriteDef = Runner.spriteDefinition.LDPI;\n        }\n        this.altGameModeActive = true;\n        this.tRex.enableAltGameMode(this.spriteDef.TREX);\n        this.horizon.enableAltGameMode(this.spriteDef);\n        this.generatedSoundFx.background();\n    },\n    /**\n     * Update the game frame and schedules the next one.\n     */\n    update() {\n        this.updatePending = false;\n        const now = getTimeStamp();\n        let deltaTime = now - (this.time || now);\n        // Flashing when switching game modes.\n        if (this.altGameModeFlashTimer < 0 || this.altGameModeFlashTimer === 0) {\n            this.altGameModeFlashTimer = null;\n            this.tRex.setFlashing(false);\n            this.enableAltGameMode();\n        }\n        else if (this.altGameModeFlashTimer > 0) {\n            this.altGameModeFlashTimer -= deltaTime;\n            this.tRex.update(deltaTime);\n            deltaTime = 0;\n        }\n        this.time = now;\n        if (this.playing) {\n            this.clearCanvas();\n            // Additional fade in - Prevents jump when switching sprites\n            if (this.altGameModeActive &&\n                this.fadeInTimer <= this.config.FADE_DURATION) {\n                this.fadeInTimer += deltaTime / 1000;\n                this.canvasCtx.globalAlpha = this.fadeInTimer;\n            }\n            else {\n                this.canvasCtx.globalAlpha = 1;\n            }\n            if (this.tRex.jumping) {\n                this.tRex.updateJump(deltaTime);\n            }\n            this.runningTime += deltaTime;\n            const hasObstacles = this.runningTime > this.config.CLEAR_TIME;\n            // First jump triggers the intro.\n            if (this.tRex.jumpCount === 1 && !this.playingIntro) {\n                this.playIntro();\n            }\n            // The horizon doesn't move until the intro is over.\n            if (this.playingIntro) {\n                this.horizon.update(0, this.currentSpeed, hasObstacles);\n            }\n            else if (!this.crashed) {\n                const showNightMode = this.isDarkMode ^ this.inverted;\n                deltaTime = !this.activated ? 0 : deltaTime;\n                this.horizon.update(deltaTime, this.currentSpeed, hasObstacles, showNightMode);\n            }\n            // Check for collisions.\n            let collision = hasObstacles &&\n                checkForCollision(this.horizon.obstacles[0], this.tRex);\n            // For a11y, audio cues.\n            if (Runner.audioCues && hasObstacles) {\n                const jumpObstacle = this.horizon.obstacles[0].typeConfig.type !== 'COLLECTABLE';\n                if (!this.horizon.obstacles[0].jumpAlerted) {\n                    const threshold = Runner.isMobileMouseInput ?\n                        Runner.config.AUDIOCUE_PROXIMITY_THRESHOLD_MOBILE_A11Y :\n                        Runner.config.AUDIOCUE_PROXIMITY_THRESHOLD;\n                    const adjProximityThreshold = threshold +\n                        (threshold * Math.log10(this.currentSpeed / Runner.config.SPEED));\n                    if (this.horizon.obstacles[0].xPos < adjProximityThreshold) {\n                        if (jumpObstacle) {\n                            this.generatedSoundFx.jump();\n                        }\n                        this.horizon.obstacles[0].jumpAlerted = true;\n                    }\n                }\n            }\n            // Activated alt game mode.\n            if (Runner.isAltGameModeEnabled() && collision &&\n                this.horizon.obstacles[0].typeConfig.type === 'COLLECTABLE') {\n                this.horizon.removeFirstObstacle();\n                this.tRex.setFlashing(true);\n                collision = false;\n                this.altGameModeFlashTimer = this.config.FLASH_DURATION;\n                this.runningTime = 0;\n                this.generatedSoundFx.collect();\n            }\n            if (!collision) {\n                this.distanceRan += this.currentSpeed * deltaTime / this.msPerFrame;\n                if (this.currentSpeed < this.config.MAX_SPEED) {\n                    this.currentSpeed += this.config.ACCELERATION;\n                }\n            }\n            else {\n                this.gameOver();\n            }\n            const playAchievementSound = this.distanceMeter.update(deltaTime, Math.ceil(this.distanceRan));\n            if (!Runner.audioCues && playAchievementSound) {\n                this.playSound(this.soundFx.SCORE);\n            }\n            // Night mode.\n            if (!Runner.isAltGameModeEnabled()) {\n                if (this.invertTimer > this.config.INVERT_FADE_DURATION) {\n                    this.invertTimer = 0;\n                    this.invertTrigger = false;\n                    this.invert(false);\n                }\n                else if (this.invertTimer) {\n                    this.invertTimer += deltaTime;\n                }\n                else {\n                    const actualDistance = this.distanceMeter.getActualDistance(Math.ceil(this.distanceRan));\n                    if (actualDistance > 0) {\n                        this.invertTrigger =\n                            !(actualDistance % this.config.INVERT_DISTANCE);\n                        if (this.invertTrigger && this.invertTimer === 0) {\n                            this.invertTimer += deltaTime;\n                            this.invert(false);\n                        }\n                    }\n                }\n            }\n        }\n        if (this.playing ||\n            (!this.activated &&\n                this.tRex.blinkCount < Runner.config.MAX_BLINK_COUNT)) {\n            this.tRex.update(deltaTime);\n            this.scheduleNextUpdate();\n        }\n    },\n    /**\n     * Event handler.\n     * @param {Event} e\n     */\n    handleEvent(e) {\n        return (function (evtType, events) {\n            switch (evtType) {\n                case events.KEYDOWN:\n                case events.TOUCHSTART:\n                case events.POINTERDOWN:\n                    this.onKeyDown(e);\n                    break;\n                case events.KEYUP:\n                case events.TOUCHEND:\n                case events.POINTERUP:\n                    this.onKeyUp(e);\n                    break;\n                case events.GAMEPADCONNECTED:\n                    this.onGamepadConnected(e);\n                    break;\n            }\n        }.bind(this))(e.type, Runner.events);\n    },\n    /**\n     * Initialize audio cues if activated by focus on the canvas element.\n     * @param {Event} e\n     */\n    handleCanvasKeyPress(e) {\n        if (!this.activated && !Runner.audioCues) {\n            this.toggleSpeed();\n            Runner.audioCues = true;\n            this.generatedSoundFx.init();\n            Runner.generatedSoundFx = this.generatedSoundFx;\n            Runner.config.CLEAR_TIME *= 1.2;\n        }\n        else if (e.keyCode && Runner.keycodes.JUMP[e.keyCode]) {\n            this.onKeyDown(e);\n        }\n    },\n    /**\n     * Prevent space key press from scrolling.\n     * @param {Event} e\n     */\n    preventScrolling(e) {\n        if (e.keyCode === 32) {\n            e.preventDefault();\n        }\n    },\n    /**\n     * Toggle speed setting if toggle is shown.\n     */\n    toggleSpeed() {\n        if (Runner.audioCues) {\n            const speedChange = Runner.slowDown !== this.slowSpeedCheckbox.checked;\n            if (speedChange) {\n                Runner.slowDown = this.slowSpeedCheckbox.checked;\n                const updatedConfig = Runner.slowDown ? Runner.slowConfig : Runner.normalConfig;\n                Runner.config = Object.assign(Runner.config, updatedConfig);\n                this.currentSpeed = updatedConfig.SPEED;\n                this.tRex.enableSlowConfig();\n                this.horizon.adjustObstacleSpeed();\n            }\n            if (this.playing) {\n                this.disableSpeedToggle(true);\n            }\n        }\n    },\n    /**\n     * Show the speed toggle.\n     * From focus event or when audio cues are activated.\n     * @param {Event=} e\n     */\n    showSpeedToggle(e) {\n        const isFocusEvent = e && e.type === 'focus';\n        if (Runner.audioCues || isFocusEvent) {\n            this.slowSpeedCheckboxLabel.classList.toggle(HIDDEN_CLASS, isFocusEvent ? false : !this.crashed);\n        }\n    },\n    /**\n     * Disable the speed toggle.\n     * @param {boolean} disable\n     */\n    disableSpeedToggle(disable) {\n        if (disable) {\n            this.slowSpeedCheckbox.setAttribute('disabled', 'disabled');\n        }\n        else {\n            this.slowSpeedCheckbox.removeAttribute('disabled');\n        }\n    },\n    /**\n     * Bind relevant key / mouse / touch listeners.\n     */\n    startListening() {\n        // A11y keyboard / screen reader activation.\n        this.containerEl.addEventListener(Runner.events.KEYDOWN, this.handleCanvasKeyPress.bind(this));\n        if (!IS_MOBILE) {\n            this.containerEl.addEventListener(Runner.events.FOCUS, this.showSpeedToggle.bind(this));\n        }\n        this.canvas.addEventListener(Runner.events.KEYDOWN, this.preventScrolling.bind(this));\n        this.canvas.addEventListener(Runner.events.KEYUP, this.preventScrolling.bind(this));\n        // Keys.\n        document.addEventListener(Runner.events.KEYDOWN, this);\n        document.addEventListener(Runner.events.KEYUP, this);\n        // Touch / pointer.\n        this.containerEl.addEventListener(Runner.events.TOUCHSTART, this);\n        document.addEventListener(Runner.events.POINTERDOWN, this);\n        document.addEventListener(Runner.events.POINTERUP, this);\n        if (this.isArcadeMode()) {\n            // Gamepad\n            window.addEventListener(Runner.events.GAMEPADCONNECTED, this);\n        }\n    },\n    /**\n     * Remove all listeners.\n     */\n    stopListening() {\n        document.removeEventListener(Runner.events.KEYDOWN, this);\n        document.removeEventListener(Runner.events.KEYUP, this);\n        if (this.touchController) {\n            this.touchController.removeEventListener(Runner.events.TOUCHSTART, this);\n            this.touchController.removeEventListener(Runner.events.TOUCHEND, this);\n        }\n        this.containerEl.removeEventListener(Runner.events.TOUCHSTART, this);\n        document.removeEventListener(Runner.events.POINTERDOWN, this);\n        document.removeEventListener(Runner.events.POINTERUP, this);\n        if (this.isArcadeMode()) {\n            window.removeEventListener(Runner.events.GAMEPADCONNECTED, this);\n        }\n    },\n    /**\n     * Process keydown.\n     * @param {Event} e\n     */\n    onKeyDown(e) {\n        // Prevent native page scrolling whilst tapping on mobile.\n        if (IS_MOBILE && this.playing) {\n            e.preventDefault();\n        }\n        if (this.isCanvasInView()) {\n            // Allow toggling of speed toggle.\n            if (Runner.keycodes.JUMP[e.keyCode] &&\n                e.target === this.slowSpeedCheckbox) {\n                return;\n            }\n            if (!this.crashed && !this.paused) {\n                // For a11y, screen reader activation.\n                const isMobileMouseInput = IS_MOBILE &&\n                    e.type === Runner.events.POINTERDOWN && e.pointerType === 'mouse' &&\n                    (e.target === this.containerEl ||\n                        (IS_IOS &&\n                            (e.target === this.touchController || e.target === this.canvas)));\n                if (Runner.keycodes.JUMP[e.keyCode] ||\n                    e.type === Runner.events.TOUCHSTART || isMobileMouseInput) {\n                    e.preventDefault();\n                    // Starting the game for the first time.\n                    if (!this.playing) {\n                        // Started by touch so create a touch controller.\n                        if (!this.touchController && e.type === Runner.events.TOUCHSTART) {\n                            this.createTouchController();\n                        }\n                        if (isMobileMouseInput) {\n                            this.handleCanvasKeyPress(e);\n                        }\n                        this.loadSounds();\n                        this.setPlayStatus(true);\n                        this.update();\n                        if (window.errorPageController) {\n                            errorPageController.trackEasterEgg();\n                        }\n                    }\n                    // Start jump.\n                    if (!this.tRex.jumping && !this.tRex.ducking) {\n                        if (Runner.audioCues) {\n                            this.generatedSoundFx.cancelFootSteps();\n                        }\n                        else {\n                            this.playSound(this.soundFx.BUTTON_PRESS);\n                        }\n                        this.tRex.startJump(this.currentSpeed);\n                    }\n                }\n                else if (this.playing && Runner.keycodes.DUCK[e.keyCode]) {\n                    e.preventDefault();\n                    if (this.tRex.jumping) {\n                        // Speed drop, activated only when jump key is not pressed.\n                        this.tRex.setSpeedDrop();\n                    }\n                    else if (!this.tRex.jumping && !this.tRex.ducking) {\n                        // Duck.\n                        this.tRex.setDuck(true);\n                    }\n                }\n            }\n        }\n    },\n    /**\n     * Process key up.\n     * @param {Event} e\n     */\n    onKeyUp(e) {\n        const keyCode = String(e.keyCode);\n        const isjumpKey = Runner.keycodes.JUMP[keyCode] ||\n            e.type === Runner.events.TOUCHEND || e.type === Runner.events.POINTERUP;\n        if (this.isRunning() && isjumpKey) {\n            this.tRex.endJump();\n        }\n        else if (Runner.keycodes.DUCK[keyCode]) {\n            this.tRex.speedDrop = false;\n            this.tRex.setDuck(false);\n        }\n        else if (this.crashed) {\n            // Check that enough time has elapsed before allowing jump key to restart.\n            const deltaTime = getTimeStamp() - this.time;\n            if (this.isCanvasInView() &&\n                (Runner.keycodes.RESTART[keyCode] || this.isLeftClickOnCanvas(e) ||\n                    (deltaTime >= this.config.GAMEOVER_CLEAR_TIME &&\n                        Runner.keycodes.JUMP[keyCode]))) {\n                this.handleGameOverClicks(e);\n            }\n        }\n        else if (this.paused && isjumpKey) {\n            // Reset the jump state\n            this.tRex.reset();\n            this.play();\n        }\n    },\n    /**\n     * Process gamepad connected event.\n     * @param {Event} e\n     */\n    onGamepadConnected(e) {\n        if (!this.pollingGamepads) {\n            this.pollGamepadState();\n        }\n    },\n    /**\n     * rAF loop for gamepad polling.\n     */\n    pollGamepadState() {\n        const gamepads = navigator.getGamepads();\n        this.pollActiveGamepad(gamepads);\n        this.pollingGamepads = true;\n        requestAnimationFrame(this.pollGamepadState.bind(this));\n    },\n    /**\n     * Polls for a gamepad with the jump button pressed. If one is found this\n     * becomes the \"active\" gamepad and all others are ignored.\n     * @param {!Array<Gamepad>} gamepads\n     */\n    pollForActiveGamepad(gamepads) {\n        for (let i = 0; i < gamepads.length; ++i) {\n            if (gamepads[i] && gamepads[i].buttons.length > 0 &&\n                gamepads[i].buttons[0].pressed) {\n                this.gamepadIndex = i;\n                this.pollActiveGamepad(gamepads);\n                return;\n            }\n        }\n    },\n    /**\n     * Polls the chosen gamepad for button presses and generates KeyboardEvents\n     * to integrate with the rest of the game logic.\n     * @param {!Array<Gamepad>} gamepads\n     */\n    pollActiveGamepad(gamepads) {\n        if (this.gamepadIndex === undefined) {\n            this.pollForActiveGamepad(gamepads);\n            return;\n        }\n        const gamepad = gamepads[this.gamepadIndex];\n        if (!gamepad) {\n            this.gamepadIndex = undefined;\n            this.pollForActiveGamepad(gamepads);\n            return;\n        }\n        // The gamepad specification defines the typical mapping of physical buttons\n        // to button indicies: https://w3c.github.io/gamepad/#remapping\n        this.pollGamepadButton(gamepad, 0, 38); // Jump\n        if (gamepad.buttons.length >= 2) {\n            this.pollGamepadButton(gamepad, 1, 40); // Duck\n        }\n        if (gamepad.buttons.length >= 10) {\n            this.pollGamepadButton(gamepad, 9, 13); // Restart\n        }\n        this.previousGamepad = gamepad;\n    },\n    /**\n     * Generates a key event based on a gamepad button.\n     * @param {!Gamepad} gamepad\n     * @param {number} buttonIndex\n     * @param {number} keyCode\n     */\n    pollGamepadButton(gamepad, buttonIndex, keyCode) {\n        const state = gamepad.buttons[buttonIndex].pressed;\n        let previousState = false;\n        if (this.previousGamepad) {\n            previousState = this.previousGamepad.buttons[buttonIndex].pressed;\n        }\n        // Generate key events on the rising and falling edge of a button press.\n        if (state !== previousState) {\n            const e = new KeyboardEvent(state ? Runner.events.KEYDOWN : Runner.events.KEYUP, { keyCode: keyCode });\n            document.dispatchEvent(e);\n        }\n    },\n    /**\n     * Handle interactions on the game over screen state.\n     * A user is able to tap the high score twice to reset it.\n     * @param {Event} e\n     */\n    handleGameOverClicks(e) {\n        if (e.target !== this.slowSpeedCheckbox) {\n            e.preventDefault();\n            if (this.distanceMeter.hasClickedOnHighScore(e) && this.highestScore) {\n                if (this.distanceMeter.isHighScoreFlashing()) {\n                    // Subsequent click, reset the high score.\n                    this.saveHighScore(0, true);\n                    this.distanceMeter.resetHighScore();\n                }\n                else {\n                    // First click, flash the high score.\n                    this.distanceMeter.startHighScoreFlashing();\n                }\n            }\n            else {\n                this.distanceMeter.cancelHighScoreFlashing();\n                this.restart();\n            }\n        }\n    },\n    /**\n     * Returns whether the event was a left click on canvas.\n     * On Windows right click is registered as a click.\n     * @param {Event} e\n     * @return {boolean}\n     */\n    isLeftClickOnCanvas(e) {\n        return e.button != null && e.button < 2 &&\n            e.type === Runner.events.POINTERUP &&\n            (e.target === this.canvas ||\n                (IS_MOBILE && Runner.audioCues && e.target === this.containerEl));\n    },\n    /**\n     * RequestAnimationFrame wrapper.\n     */\n    scheduleNextUpdate() {\n        if (!this.updatePending) {\n            this.updatePending = true;\n            this.raqId = requestAnimationFrame(this.update.bind(this));\n        }\n    },\n    /**\n     * Whether the game is running.\n     * @return {boolean}\n     */\n    isRunning() {\n        return !!this.raqId;\n    },\n    /**\n     * Set the initial high score as stored in the user's profile.\n     * @param {number} highScore\n     */\n    initializeHighScore(highScore) {\n        this.syncHighestScore = true;\n        highScore = Math.ceil(highScore);\n        if (highScore < this.highestScore) {\n            if (window.errorPageController) {\n                errorPageController.updateEasterEggHighScore(this.highestScore);\n            }\n            return;\n        }\n        this.highestScore = highScore;\n        this.distanceMeter.setHighScore(this.highestScore);\n    },\n    /**\n     * Sets the current high score and saves to the profile if available.\n     * @param {number} distanceRan Total distance ran.\n     * @param {boolean=} opt_resetScore Whether to reset the score.\n     */\n    saveHighScore(distanceRan, opt_resetScore) {\n        this.highestScore = Math.ceil(distanceRan);\n        this.distanceMeter.setHighScore(this.highestScore);\n        // Store the new high score in the profile.\n        if (this.syncHighestScore && window.errorPageController) {\n            if (opt_resetScore) {\n                errorPageController.resetEasterEggHighScore();\n            }\n            else {\n                errorPageController.updateEasterEggHighScore(this.highestScore);\n            }\n        }\n    },\n    /**\n     * Game over state.\n     */\n    gameOver() {\n        this.playSound(this.soundFx.HIT);\n        vibrate(200);\n        this.stop();\n        this.crashed = true;\n        this.distanceMeter.achievement = false;\n        this.tRex.update(100, Trex.status.CRASHED);\n        // Game over panel.\n        if (!this.gameOverPanel) {\n            const origSpriteDef = IS_HIDPI ? spriteDefinitionByType.original.HDPI :\n                spriteDefinitionByType.original.LDPI;\n            if (this.canvas) {\n                if (Runner.isAltGameModeEnabled) {\n                    this.gameOverPanel = new GameOverPanel(this.canvas, origSpriteDef.TEXT_SPRITE, origSpriteDef.RESTART, this.dimensions, origSpriteDef.ALT_GAME_END, this.altGameModeActive);\n                }\n                else {\n                    this.gameOverPanel = new GameOverPanel(this.canvas, origSpriteDef.TEXT_SPRITE, origSpriteDef.RESTART, this.dimensions);\n                }\n            }\n        }\n        this.gameOverPanel.draw(this.altGameModeActive, this.tRex);\n        // Update the high score.\n        if (this.distanceRan > this.highestScore) {\n            this.saveHighScore(this.distanceRan);\n        }\n        // Reset the time clock.\n        this.time = getTimeStamp();\n        if (Runner.audioCues) {\n            this.generatedSoundFx.stopAll();\n            announcePhrase(getA11yString(A11Y_STRINGS.gameOver)\n                .replace('$1', this.distanceMeter.getActualDistance(this.distanceRan)\n                .toString()) +\n                ' ' +\n                getA11yString(A11Y_STRINGS.highScore)\n                    .replace('$1', this.distanceMeter.getActualDistance(this.highestScore)\n                    .toString()));\n            this.containerEl.setAttribute('title', getA11yString(A11Y_STRINGS.ariaLabel));\n        }\n        this.showSpeedToggle();\n        this.disableSpeedToggle(false);\n    },\n    stop() {\n        this.setPlayStatus(false);\n        this.paused = true;\n        cancelAnimationFrame(this.raqId);\n        this.raqId = 0;\n        this.generatedSoundFx.stopAll();\n    },\n    play() {\n        if (!this.crashed) {\n            this.setPlayStatus(true);\n            this.paused = false;\n            this.tRex.update(0, Trex.status.RUNNING);\n            this.time = getTimeStamp();\n            this.update();\n            this.generatedSoundFx.background();\n        }\n    },\n    restart() {\n        if (!this.raqId) {\n            this.playCount++;\n            this.runningTime = 0;\n            this.setPlayStatus(true);\n            this.toggleSpeed();\n            this.paused = false;\n            this.crashed = false;\n            this.distanceRan = 0;\n            this.setSpeed(this.config.SPEED);\n            this.time = getTimeStamp();\n            this.containerEl.classList.remove(Runner.classes.CRASHED);\n            this.clearCanvas();\n            this.distanceMeter.reset();\n            this.horizon.reset();\n            this.tRex.reset();\n            this.playSound(this.soundFx.BUTTON_PRESS);\n            this.invert(true);\n            this.flashTimer = null;\n            this.update();\n            this.gameOverPanel.reset();\n            this.generatedSoundFx.background();\n            this.containerEl.setAttribute('title', getA11yString(A11Y_STRINGS.jump));\n            announcePhrase(getA11yString(A11Y_STRINGS.started));\n        }\n    },\n    setPlayStatus(isPlaying) {\n        if (this.touchController) {\n            this.touchController.classList.toggle(HIDDEN_CLASS, !isPlaying);\n        }\n        this.playing = isPlaying;\n    },\n    /**\n     * Whether the game should go into arcade mode.\n     * @return {boolean}\n     */\n    isArcadeMode() {\n        // In RTL languages the title is wrapped with the left to right mark\n        // control characters &#x202A; and &#x202C but are invisible.\n        return IS_RTL ? document.title.indexOf(ARCADE_MODE_URL) === 1 :\n            document.title === ARCADE_MODE_URL;\n    },\n    /**\n     * Hides offline messaging for a fullscreen game only experience.\n     */\n    setArcadeMode() {\n        document.body.classList.add(Runner.classes.ARCADE_MODE);\n        this.setArcadeModeContainerScale();\n    },\n    /**\n     * Sets the scaling for arcade mode.\n     */\n    setArcadeModeContainerScale() {\n        const windowHeight = window.innerHeight;\n        const scaleHeight = windowHeight / this.dimensions.HEIGHT;\n        const scaleWidth = window.innerWidth / this.dimensions.WIDTH;\n        const scale = Math.max(1, Math.min(scaleHeight, scaleWidth));\n        const scaledCanvasHeight = this.dimensions.HEIGHT * scale;\n        // Positions the game container at 10% of the available vertical window\n        // height minus the game container height.\n        const translateY = Math.ceil(Math.max(0, (windowHeight - scaledCanvasHeight -\n            Runner.config.ARCADE_MODE_INITIAL_TOP_POSITION) *\n            Runner.config.ARCADE_MODE_TOP_POSITION_PERCENT)) *\n            window.devicePixelRatio;\n        const cssScale = IS_RTL ? -scale + ',' + scale : scale;\n        this.containerEl.style.transform =\n            'scale(' + cssScale + ') translateY(' + translateY + 'px)';\n    },\n    /**\n     * Pause the game if the tab is not in focus.\n     */\n    onVisibilityChange(e) {\n        if (document.hidden || document.webkitHidden || e.type === 'blur' ||\n            document.visibilityState !== 'visible') {\n            this.stop();\n        }\n        else if (!this.crashed) {\n            this.tRex.reset();\n            this.play();\n        }\n    },\n    /**\n     * Play a sound.\n     * @param {AudioBuffer} soundBuffer\n     */\n    playSound(soundBuffer) {\n        if (soundBuffer) {\n            const sourceNode = this.audioContext.createBufferSource();\n            sourceNode.buffer = soundBuffer;\n            sourceNode.connect(this.audioContext.destination);\n            sourceNode.start(0);\n        }\n    },\n    /**\n     * Inverts the current page / canvas colors.\n     * @param {boolean} reset Whether to reset colors.\n     */\n    invert(reset) {\n        const htmlEl = document.firstElementChild;\n        if (reset) {\n            htmlEl.classList.toggle(Runner.classes.INVERTED, false);\n            this.invertTimer = 0;\n            this.inverted = false;\n        }\n        else {\n            this.inverted =\n                htmlEl.classList.toggle(Runner.classes.INVERTED, this.invertTrigger);\n        }\n    },\n};\n/**\n * Updates the canvas size taking into\n * account the backing store pixel ratio and\n * the device pixel ratio.\n *\n * See article by Paul Lewis:\n * http://www.html5rocks.com/en/tutorials/canvas/hidpi/\n *\n * @param {HTMLCanvasElement} canvas\n * @param {number=} opt_width\n * @param {number=} opt_height\n * @return {boolean} Whether the canvas was scaled.\n */\nRunner.updateCanvasScaling = function (canvas, opt_width, opt_height) {\n    const context = \n    /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));\n    // Query the various pixel ratios\n    const devicePixelRatio = Math.floor(window.devicePixelRatio) || 1;\n    /** @suppress {missingProperties} */\n    const backingStoreRatio = Math.floor(context.webkitBackingStorePixelRatio) || 1;\n    const ratio = devicePixelRatio / backingStoreRatio;\n    // Upscale the canvas if the two ratios don't match\n    if (devicePixelRatio !== backingStoreRatio) {\n        const oldWidth = opt_width || canvas.width;\n        const oldHeight = opt_height || canvas.height;\n        canvas.width = oldWidth * ratio;\n        canvas.height = oldHeight * ratio;\n        canvas.style.width = oldWidth + 'px';\n        canvas.style.height = oldHeight + 'px';\n        // Scale the context to counter the fact that we've manually scaled\n        // our canvas element.\n        context.scale(ratio, ratio);\n        return true;\n    }\n    else if (devicePixelRatio === 1) {\n        // Reset the canvas width / height. Fixes scaling bug when the page is\n        // zoomed and the devicePixelRatio changes accordingly.\n        canvas.style.width = canvas.width + 'px';\n        canvas.style.height = canvas.height + 'px';\n    }\n    return false;\n};\n/**\n * Whether events are enabled.\n * @return {boolean}\n */\nRunner.isAltGameModeEnabled = function () {\n    return loadTimeData && loadTimeData.valueExists('enableAltGameMode');\n};\n/**\n * For screen readers make an announcement to the live region.\n * @param {string} phrase Sentence to speak.\n */\nfunction announcePhrase(phrase) {\n    if (Runner.a11yStatusEl) {\n        Runner.a11yStatusEl.textContent = '';\n        Runner.a11yStatusEl.textContent = phrase;\n    }\n}\n/**\n * Returns a string from loadTimeData data object.\n * @param {string} stringName\n * @return {string}\n */\nfunction getA11yString(stringName) {\n    return loadTimeData && loadTimeData.valueExists(stringName) ?\n        loadTimeData.getString(stringName) :\n        '';\n}\n/**\n * Vibrate on mobile devices.\n * @param {number} duration Duration of the vibration in milliseconds.\n */\nfunction vibrate(duration) {\n    if (IS_MOBILE && window.navigator.vibrate) {\n        window.navigator.vibrate(duration);\n    }\n}\n/**\n * Create canvas element.\n * @param {Element} container Element to append canvas to.\n * @param {number} width\n * @param {number} height\n * @param {string=} opt_classname\n * @return {HTMLCanvasElement}\n */\nfunction createCanvas(container, width, height, opt_classname) {\n    const canvas = \n    /** @type {!HTMLCanvasElement} */ (document.createElement('canvas'));\n    canvas.className = Runner.classes.CANVAS;\n    canvas.width = width;\n    canvas.height = height;\n    container.appendChild(canvas);\n    return canvas;\n}\n/**\n * Decodes the base 64 audio to ArrayBuffer used by Web Audio.\n * @param {string} base64String\n */\nfunction decodeBase64ToArrayBuffer(base64String) {\n    const len = (base64String.length / 4) * 3;\n    const str = atob(base64String);\n    const arrayBuffer = new ArrayBuffer(len);\n    const bytes = new Uint8Array(arrayBuffer);\n    for (let i = 0; i < len; i++) {\n        bytes[i] = str.charCodeAt(i);\n    }\n    return bytes.buffer;\n}\n//******************************************************************************\n/**\n * Check for a collision.\n * @param {!Obstacle} obstacle\n * @param {!Trex} tRex T-rex object.\n * @param {CanvasRenderingContext2D=} opt_canvasCtx Optional canvas context for\n *    drawing collision boxes.\n * @return {Array<CollisionBox>|undefined}\n */\nfunction checkForCollision(obstacle, tRex, opt_canvasCtx) {\n    Runner.defaultDimensions.WIDTH + obstacle.xPos;\n    // Adjustments are made to the bounding box as there is a 1 pixel white\n    // border around the t-rex and obstacles.\n    const tRexBox = new CollisionBox(tRex.xPos + 1, tRex.yPos + 1, tRex.config.WIDTH - 2, tRex.config.HEIGHT - 2);\n    const obstacleBox = new CollisionBox(obstacle.xPos + 1, obstacle.yPos + 1, obstacle.typeConfig.width * obstacle.size - 2, obstacle.typeConfig.height - 2);\n    // Simple outer bounds check.\n    if (boxCompare(tRexBox, obstacleBox)) {\n        const collisionBoxes = obstacle.collisionBoxes;\n        let tRexCollisionBoxes = [];\n        if (Runner.isAltGameModeEnabled()) {\n            tRexCollisionBoxes = Runner.spriteDefinition.TREX.COLLISION_BOXES;\n        }\n        else {\n            tRexCollisionBoxes = tRex.ducking ? Trex.collisionBoxes.DUCKING :\n                Trex.collisionBoxes.RUNNING;\n        }\n        // Detailed axis aligned box check.\n        for (let t = 0; t < tRexCollisionBoxes.length; t++) {\n            for (let i = 0; i < collisionBoxes.length; i++) {\n                // Adjust the box to actual positions.\n                const adjTrexBox = createAdjustedCollisionBox(tRexCollisionBoxes[t], tRexBox);\n                const adjObstacleBox = createAdjustedCollisionBox(collisionBoxes[i], obstacleBox);\n                const crashed = boxCompare(adjTrexBox, adjObstacleBox);\n                if (crashed) {\n                    return [adjTrexBox, adjObstacleBox];\n                }\n            }\n        }\n    }\n}\n/**\n * Adjust the collision box.\n * @param {!CollisionBox} box The original box.\n * @param {!CollisionBox} adjustment Adjustment box.\n * @return {CollisionBox} The adjusted collision box object.\n */\nfunction createAdjustedCollisionBox(box, adjustment) {\n    return new CollisionBox(box.x + adjustment.x, box.y + adjustment.y, box.width, box.height);\n}\n/**\n * Compare two collision boxes for a collision.\n * @param {CollisionBox} tRexBox\n * @param {CollisionBox} obstacleBox\n * @return {boolean} Whether the boxes intersected.\n */\nfunction boxCompare(tRexBox, obstacleBox) {\n    let crashed = false;\n    tRexBox.x;\n    tRexBox.y;\n    const obstacleBoxX = obstacleBox.x;\n    obstacleBox.y;\n    // Axis-Aligned Bounding Box method.\n    if (tRexBox.x < obstacleBoxX + obstacleBox.width &&\n        tRexBox.x + tRexBox.width > obstacleBoxX &&\n        tRexBox.y < obstacleBox.y + obstacleBox.height &&\n        tRexBox.height + tRexBox.y > obstacleBox.y) {\n        crashed = true;\n    }\n    return crashed;\n}\n\n// Copyright 2013 The Chromium Authors\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\nlet showingDetails = false;\nlet lastData = null;\nfunction toggleHelpBox() {\n    showingDetails = !showingDetails;\n    assert(lastData);\n    j(getHtml(lastData, showingDetails), getRequiredElement('content'));\n}\nfunction diagnoseErrors() {\n    if (window.errorPageController) {\n        window.errorPageController.diagnoseErrorsButtonClick();\n    }\n}\nfunction portalSignin() {\n    if (window.errorPageController) {\n        window.errorPageController.portalSigninButtonClick();\n    }\n}\n// Subframes use a different layout but the same html file.  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