https://www.cnfpt.fr/assets/js/unsupport-browser.js

1
2navigator.sayswho = ( function () {
3  var ua = navigator.userAgent, tem,
4    M = ua.match( /(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i ) || [];
5  if ( /trident/i.test( M[1] ) ) {
6    tem = /\brv[ :]+(\d+)/g.exec( ua ) || [];
7    return 'IE ' + ( tem[1] || '' );
8  }
9  if ( /msie/i.test( M[1] ) ) {
10    tem = /\bMSIE[ ]+(\d+)/g.exec( ua ) || [];
11    return 'IE ' + ( tem[1] || '' );
12  }
13  if ( M[1] === 'Chrome' ) {
14    tem = ua.match( /\b(OPR|Edge)\/(\d+)/ );
15    if ( tem != null ) return tem.slice( 1 ).join( ' ' ).replace( 'OPR', 'Opera' );
16  }
17  M = M[2] ? [M[1], M[2]] : [navigator.appName, navigator.appVersion, '-?'];
18  if ( ( tem = ua.match( /version\/(\d+)/i ) ) != null ) M.splice( 1, 1, tem[1] );
19  return M.join( ' ' );
20})();
21
22if(typeof String.prototype.trim !== 'function') {
23  String.prototype.trim = function() {
24    return this.replace(/^\s+|\s+$/g, '');
25  }
26}
27
28var str = navigator.sayswho;
29var browser = str.substring( 0, str.indexOf( " " ) );
30var version = str.substring( str.indexOf( " " ) );
31version = version.trim();
32version = parseInt( version );
33
34if ( ( browser === "Chrome" && version < 87 )
35  || ( browser === "Firefox" && version < 60 )
36  || ( browser === "Safari" && version < 10 )
37  || ( browser === "IE")
38  || (!!window.MSInputMethodContext && !!document.documentMode)
39  || ( browser === "Opera" && version < 52 ) ) {
40  var unsupport_browser = document.getElementById('unsupport-browser');
41  if (unsupport_browser) { unsupport_browser.style.display = 'block'; }
42}else {
43  var app_root = document.getElementById('app-root');
44  if (app_root) { app_root.style.display = 'block'; }
45}