Let’s see the example,
Result looks like his pic.
// Opera 8.0+
var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
// Firefox 1.0+
var isFirefox = typeof InstallTrigger !== 'undefined';
// Safari 3.0+
"[object HTMLElementConstructor]"
var isSafari = /constructor/i.test(window.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window['safari'] || (typeof safari !== 'undefined' && safari.pushNotification));
// Internet Explorer
6-11
var isIE = /*@cc_on!@*/false || !!document.documentMode;
// Edge 20+
var isEdge = !isIE && !!window.StyleMedia;
// Chrome 1 - 71
var isChrome = !!window.chrome && (!!window.chrome.webstore || !!window.chrome.runtime);
// Blink engine
detection
var isBlink = (isChrome || isOpera) && !!window.CSS;
console.log('isFirefox: ' + isFirefox);
console.log('isChrome: ' + isChrome);
console.log('isSafari: ' + isSafari);
console.log('isOpera: ' + isOpera);
console.log('isIE: ' + isIE);
console.log('isEdge: ' + isEdge);
console.log('isBlink: ' + isBlink);