ui/public/index.html - answer - Git at Google

 <!--

     Licensed to the Apache Software Foundation (ASF) under one
     or more contributor license agreements.  See the NOTICE file
     distributed with this work for additional information
     regarding copyright ownership.  The ASF licenses this file
     to you under the Apache License, Version 2.0 (the
     "License"); you may not use this file except in compliance
     with the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing,
     software distributed under the License is distributed on an
     "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     KIND, either express or implied.  See the License for the
     specific language governing permissions and limitations
     under the License.

 -->
 <!DOCTYPE html>
 <html data-bs-theme="">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
     <meta name="theme-color" />
     <meta name="generator" content="Answer - https://github.com/apache/answer">
     <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
   </head>
   <body>
     <noscript>You need to enable JavaScript to run this app.</noscript>
     <div id="root">
       <div id="spin-mask">
         <noscript>
           <style>
             #spin-mask {
               display: none !important;
             }

             #protect-browser {
               display: none;
             }
           </style>
         </noscript>
         <style>
           @keyframes _doc-spin {
             to { transform: rotate(360deg) }
           }
           #spin-mask {
             position: fixed;
             top: 0;
             right: 0;
             bottom: 0;
             left: 0;
             background-color: white;
             z-index: 9999;
           }
           #spin-container {
             position: absolute;
             top: 50%;
             left: 50%;
             transform: translate(-50%, -50%);
           }
           #spin-container .spinner {
             box-sizing: border-box;
             display: inline-block;
             width: 2rem;
             height: 2rem;
             vertical-align: -.125em;
             border: .25rem solid currentColor;
             border-right-color: transparent;
             color: rgba(108, 117, 125, .75);
             border-radius: 50%;
             animation: 0.75s linear infinite _doc-spin;
           }

           #protect-browser {
             padding: 20px;
             text-align: center;
           }
         </style>
         <div id="spin-container">
           <div class="spinner"></div>
         </div>
         <div id="protect-browser"></div>
       </div>

     </div>
   </body>
   <script>
     // disable react devtools
     if (typeof window.__REACT_DEVTOOLS_GLOBAL_HOOK__ === 'object') {
       window.__REACT_DEVTOOLS_GLOBAL_HOOK__.inject = function () {};
     }
     /**
      * @description: Prompt that the browser version is too low
     */
     const defaultList = [
       {
         name: 'Edge',
         version: '100'
       },
       {
         name: 'Firefox',
         version: '100'
       },
       {
         name: 'Chrome',
         version: '90'
       },
       {
         name: 'Safari',
         version: '15'
       },
       {
         name: 'IE',
       }
     ];
     function getBrowserTypeAndVersion(){
       var browser = {
         name: '',
         version: ''
       };
       var ua = navigator.userAgent.toLowerCase();
       var s;
       ((ua.indexOf("compatible") > -1 && ua.indexOf("MSIE") > -1) || (ua.indexOf('Trident') > -1 && ua.indexOf("rv:11.0") > -1)) ? browser = { name: 'IE', version: '' } :
       (s = ua.match(/edge\/([\d\.]+)/)) ? browser = { name: 'Edge', version: s[1] } :
       (s = ua.match(/firefox\/([\d\.]+)/)) ? browser = { name: 'Firefox', version: s[1] } :
       (s = ua.match(/chrome\/([\d\.]+)/)) ?  browser = { name: 'Chrome', version: s[1] } :
       (s = ua.match(/version\/([\d\.]+).*safari/)) ?  browser = { name: 'Safari', version: s[1] } : browser = { name: 'unknown', version: '' };
       // 根据关系进行判断
       return browser;
     }

     function compareVersion(version1, version2) {
       var v1 = version1.split('.');
       var v2 = version2.split('.');
       var len = Math.max(v1.length, v2.length);
       while (v1.length < len) {
         v1.push('0');
       }
       while (v2.length < len) {
         v2.push('0');
       }
       for (var i = 0; i < len; i++) {
         var num1 = parseInt(v1[i]);
         var num2 = parseInt(v2[i]);
         if (num1 >= num2) {
           return 1;
         } else if (num1 < num2) {
           return -1;
         }
       }
       return 0;
     }

     const browserInfo = getBrowserTypeAndVersion();

     if (browserInfo.name === 'IE') {
       const div = document.getElementById('protect-browser');
       div.innerText = 'Sorry, this site does not support Internet Explorer. In order to avoid affecting the normal use of our features, please use a more modern browser such as Edge, Firefox, Chrome, or Safari.'
     } else {
       const notSupport = defaultList.some(item => {
         if (item.name === browserInfo.name) {
           return compareVersion(browserInfo.version, item.version) === -1;
         }
         return false;
       });
       if (notSupport) {
         const div = document.getElementById('protect-browser');
         div.innerText = 'The current browser version is too low, in order not to affect the normal use of the function, please upgrade the browser to the latest version.'
       }
     }

   </script>
 </html>
	<!--

	Licensed to the Apache Software Foundation (ASF) under one
	or more contributor license agreements. See the NOTICE file
	distributed with this work for additional information
	regarding copyright ownership. The ASF licenses this file
	to you under the Apache License, Version 2.0 (the
	"License"); you may not use this file except in compliance
	with the License. You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing,
	software distributed under the License is distributed on an
	"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	KIND, either express or implied. See the License for the
	specific language governing permissions and limitations
	under the License.

	-->
	<!DOCTYPE html>
	<html data-bs-theme="">
	<head>
	<meta charset="utf-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
	<meta name="theme-color" />
	<meta name="generator" content="Answer - https://github.com/apache/answer">
	<link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
	</head>
	<body>
	<noscript>You need to enable JavaScript to run this app.</noscript>
	<div id="root">
	<div id="spin-mask">
	<noscript>
	<style>
	#spin-mask {
	display: none !important;
	}

	#protect-browser {
	display: none;
	}
	</style>
	</noscript>
	<style>
	@keyframes _doc-spin {
	to { transform: rotate(360deg) }
	}
	#spin-mask {
	position: fixed;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	background-color: white;
	z-index: 9999;
	}
	#spin-container {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	}
	#spin-container .spinner {
	box-sizing: border-box;
	display: inline-block;
	width: 2rem;
	height: 2rem;
	vertical-align: -.125em;
	border: .25rem solid currentColor;
	border-right-color: transparent;
	color: rgba(108, 117, 125, .75);
	border-radius: 50%;
	animation: 0.75s linear infinite _doc-spin;
	}

	#protect-browser {
	padding: 20px;
	text-align: center;
	}
	</style>
	<div id="spin-container">
	<div class="spinner"></div>
	</div>
	<div id="protect-browser"></div>
	</div>

	</div>
	</body>
	<script>
	// disable react devtools
	if (typeof window.__REACT_DEVTOOLS_GLOBAL_HOOK__ === 'object') {
	window.__REACT_DEVTOOLS_GLOBAL_HOOK__.inject = function () {};
	}
	/**
	* @description: Prompt that the browser version is too low
	*/
	const defaultList = [
	{
	name: 'Edge',
	version: '100'
	},
	{
	name: 'Firefox',
	version: '100'
	},
	{
	name: 'Chrome',
	version: '90'
	},
	{
	name: 'Safari',
	version: '15'
	},
	{
	name: 'IE',
	}
	];
	function getBrowserTypeAndVersion(){
	var browser = {
	name: '',
	version: ''
	};
	var ua = navigator.userAgent.toLowerCase();
	var s;
	((ua.indexOf("compatible") > -1 && ua.indexOf("MSIE") > -1) \|\| (ua.indexOf('Trident') > -1 && ua.indexOf("rv:11.0") > -1)) ? browser = { name: 'IE', version: '' } :
	(s = ua.match(/edge\/([\d\.]+)/)) ? browser = { name: 'Edge', version: s[1] } :
	(s = ua.match(/firefox\/([\d\.]+)/)) ? browser = { name: 'Firefox', version: s[1] } :
	(s = ua.match(/chrome\/([\d\.]+)/)) ? browser = { name: 'Chrome', version: s[1] } :
	(s = ua.match(/version\/([\d\.]+).*safari/)) ? browser = { name: 'Safari', version: s[1] } : browser = { name: 'unknown', version: '' };
	// 根据关系进行判断
	return browser;
	}

	function compareVersion(version1, version2) {
	var v1 = version1.split('.');
	var v2 = version2.split('.');
	var len = Math.max(v1.length, v2.length);
	while (v1.length < len) {
	v1.push('0');
	}
	while (v2.length < len) {
	v2.push('0');
	}
	for (var i = 0; i < len; i++) {
	var num1 = parseInt(v1[i]);
	var num2 = parseInt(v2[i]);
	if (num1 >= num2) {
	return 1;
	} else if (num1 < num2) {
	return -1;
	}
	}
	return 0;
	}

	const browserInfo = getBrowserTypeAndVersion();

	if (browserInfo.name === 'IE') {
	const div = document.getElementById('protect-browser');
	div.innerText = 'Sorry, this site does not support Internet Explorer. In order to avoid affecting the normal use of our features, please use a more modern browser such as Edge, Firefox, Chrome, or Safari.'
	} else {
	const notSupport = defaultList.some(item => {
	if (item.name === browserInfo.name) {
	return compareVersion(browserInfo.version, item.version) === -1;
	}
	return false;
	});
	if (notSupport) {
	const div = document.getElementById('protect-browser');
	div.innerText = 'The current browser version is too low, in order not to affect the normal use of the function, please upgrade the browser to the latest version.'
	}
	}

	</script>
	</html>