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A platform detection library that works on nearly all JavaScript platforms.

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Platform.js v1.0.0

A platform detection library that works on nearly all JavaScript platforms1.


Platform.js is for informational purposes only and not intended as a substitution for feature detection/inference checks.


Platform.js is part of the BestieJS "Best in Class" module collection. This means we promote solid browser/environment support, ES5+ precedents, unit testing, and plenty of documentation.


The documentation for Platform.js can be viewed here: /doc/

The full changelog for this release is available on our wiki.
For a list of upcoming features, check out our roadmap.


Platform.js has been tested in at least Chrome 33-34, Firefox 27-28, IE 6-11, Opera 19-20, Safari 5-7, Node.js 0.6.21~0.10.26, Narwhal 0.3.2, PhantomJS 1.9.2, RingoJS 0.9, and Rhino 1.7RC5.

Installation and usage

In a browser:

<script src="platform.js"></script>

Via npm:

npm install platform

In Node.js and RingoJS:

var platform = require('platform');

In Rhino:


In an AMD loader like RequireJS:

  'paths': {
    'platform': 'path/to/platform'
['platform'], function(platform) {

Usage example:

// on IE10 x86 platform preview running in IE7 compatibility mode on Windows 7 64 bit edition; // 'IE'
platform.version; // '10.0'
platform.layout; // 'Trident'
platform.os; // 'Windows Server 2008 R2 / 7 x64'
platform.description; // 'IE 10.0 x86 (platform preview; running in IE 7 mode) on Windows Server 2008 R2 / 7 x64'

// or on an iPad; // 'Safari'
platform.version; // '5.1'
platform.product; // 'iPad'
platform.manufacturer; // 'Apple'
platform.layout; // 'WebKit'
platform.os; // 'iOS 5.0'
platform.description; // 'Safari 5.1 on Apple iPad (iOS 5.0)'

// or parsing a given UA string
var info = platform.parse('Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.2; en; rv:2.0) Gecko/20100101 Firefox/4.0 Opera 11.52');; // 'Opera'
info.version; // '11.52'
info.layout; // 'Presto'
info.os; // 'Mac OS X 10.7.2'
info.description; // 'Opera 11.52 (identifying as Firefox 4.0) on Mac OS X 10.7.2'


John-David Dalton


Mathias Bynens
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