Detect Browser in JavaScript

To detect browser in JavaScript, window.navigator object contains information about the user’s browser i.e. Firefox, Internet Explorer, Opera, etc.

JavaScript has a standard object called navigator which contains data about user’s browser. It has a lot of properties.

JavaScript window.navigator object can be written without window prefix.

For example,

• navigator.appName
• navigator.appCodeName
• navigator.platform

Browser detection is a part of any good JavaScripter’s life.

Using the property navigator.cookieEnabled, you can check whether cookies are enabled or not.

<script>
 console.log("Cookies Enabled? " + navigator.cookieEnabled);
</script>

Using the properties appName and appCodeName you can get the browser name.

<script>
 console.log("Name: " + navigator.appName);
 console.log("Code: " + navigator.appCodeName);
</script>

Read Also: JavaScript Objects Overview

Use appVersion or userAgent, to get browser’s version information.

<script>
 console.log("Version: " + navigator.appVersion);
 console.log("Version: " + navigator.userAgent);
</script>

Use navigator.platform, to get platform of the browser.

<script>
 console.log("Platform: " + navigator.platform);
</script>

You can also check whether Java is enabled in your browser or not.

<script>
 console.log("javaEnabled: " + navigator.javaEnabled());
</script>

See the below example,

// Opera 8.0+
 var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;

// Firefox 1.0+
 var isFirefox = typeof InstallTrigger !== 'undefined';

// At least Safari 3+: "[object HTMLElementConstructor]"
 var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;

// Internet Explorer 6-11
 var isIE = /*@cc_on!@*/false || !!document.documentMode;

// Edge 20+
 var isEdge = !isIE && !!window.StyleMedia;

// Chrome 1+
 var isChrome = !!window.chrome && !!window.chrome.webstore;

// Blink engine detection
 var isBlink = (isChrome || isOpera) && !!window.CSS;

DEMO: https://jsfiddle.net/4zkyz6d2/