How to detect Browser and Operating System Name and Version using JavaScript

There are times when you need to know what browser and operating system the user is using so as to display CSS and javaScript code correctly. There are many javascript libraries that are available that lets you detect them, one of such library are detect.js released under MIT License.

detect.js file uses navigator.userAgent to detect the browser details and navigator.platform to detect operating system details.

Browsers Supported :
Internet Explorer 6, 7, 8, 9,10+ Mobile
Firefox 3.6, 4, 5, 6, 7+ Mobile
Safari 3, 4, 5+ Mobile
Opera 9, 10, 11+ Mini, Mobile
Chrome, Mobile

This script is able to detect the following Operating systems :

Mac OS X
Example :
<title>Detect Browser and OS details </title>


<script src="detect.js">
    document.write("Browser : " + window.ui.browser);
    document.write("Browser version : " + window.ui.version);
    document.write("Operating System : " + window.ui.os);
    document.write("Operating System version : " + window.ui.osversion);


Output Example:
Browser : Chrome
Browser version : 83.0.4103.97
Operating System : Windows
Operating System version: undefined
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