Browser and mobile platform sniffing scripts (plugin & standalone)

These are minimalist scripts that weigh under 300B once minified and gzipped. They're tailored to my own needs and should be customized to suit your needs (detecting desktop operating systems for instance). If you are looking for a full-featured library and are ready to send 4K of JS to your users, have a look at platform.js.

When loaded in the page after jQuery, results are available using:

jQuery.browser.<name>
jQuery.browser.version

jQuery.platform.<name>
jQuery.platform.version

// Example when tested in Firefox
jQuery.browser.mozilla === true;
// Example when tested on Android
jQuery.platform.android === true;

When loaded in the page without jQuery or before jQuery, results are available using:

browser.<name>
browser.version

platform.<name>
platform.version

// Example when tested in Firefox
browser.mozilla === true;
// Example when tested on Android
platform.android === true;

The following browser <name>s are being searched for in the user-agent string:

mozilla
safari
chrome
msie
opera

The following mobile platform <name>s are being searched for in the user-agent string:

ipod
iphone
ipad
android
blackberry
windowsPhone
symbian

Browser and other user-agent sniffing is generally a bad practice in Web development. If you need to know which features are available in a users' browser, you should use future proof feature detection techniques or libraries (see modernizr.js or jQuery.support if you use jQuery).

There are still valid use cases for browser sniffing:

• as a fallback when features can't be detected or inferred (see The Undetectables)
• to match the appearance of you webapp with a platform (beware, most operating systems can be skinned)
• to offer links to specific browser extensions or mobile apps, according to the browser/platform

In any case, remember that user-agent strings can be spoofed.

MIT licensed http://louisremi.mit-license.org/