General Principles:

• HTML5 compliant: correctly and accurately implemented (HTML5) Markup-, JS- and DOM-APIs
• capability based loading: extremely lightweight in modern browsers
• cross-browser support: All A-Graded browsers including latest version of Opera are tested
• extendable: if we have not implemented a feature you want, you can easily implement it on your own

Implemented Features:

• HTML5 shiv and innerShiv solution including basic CSS-support
• canvas
• HTML5 form features including: constraint validation and form widgets (input[type="range"], input[type="date"], input[type="number"], input[type="time"], input[type="month"], output, progress, input[list]/datalist)
• HTML5 audio/video/track implementation
• interactive elements: summary/details
• JSON (stringify and parse)
• localStorage/sessionStorage
• geolocation
• ECMAScript 5 / JavaScript 1.8.5 features

• Simply download Webshims Lib and put the js-webshim-folder in your project
• Include the JavaScript:

<script src="js/jquery.js"></script>
// Simple change
<script src="js-webshim/minified/extras/modernizr-custom.js"></script> 
// 'Use your own' variant
<script src="js/Modernizr-custom.js"></script> 

<script src="js-webshim/minified/polyfiller.js"></script> 

<script> 
	//load and implement all unsupported features 
	$.webshims.polyfill();
	
	//or only load a specific feature
	//$.webshims.polyfill('geolocation json-storage');
</script>

• Wait till everything has been loaded and then use it:

<script> 
	$(function(){
		//work with JSON and localStorage 
		var userData = JSON.parse(localStorage.getItem('userData')) || {visits: 0};
		$('#visits').html(userData.visits);
		//...
	});
</script>

More information and demos here.

The Webshims Lib core is licensed under the MIT-License. Note: Webshims Lib uses many great third party scripts.

If you have any questions, please feel free to ask them on the Using jQuery Plugins forum.

Please tag your questions with 'webshims' or 'polyfill'.

• input[type="color"]
• Instant Form Validation helper (enhances the HTML5 UI for much better UX)
• FileReader API
• improved range UI styleability
• lazy load mostly everything (performance)

• override IE10's type="number" UI
• improved styleability of input[type="range"]
• improved loading of mediaelement/track support
• improved performance for dynamic content (i.e.: updatePolyfill)
• optional override of IE10's placeholder
• new fix for placeholder orientationchange bug on Safari iOS

• tested support for jQuery 2.0.0
• fixed invisible native audio controls in IE9 in case of preload="none"
• improved datepicker type="date"/type="number"
• fixed flash encoding vars for special charakters in video path
• check initially invalid inputs in Firefox
• removed unused packages (jQuery UI, swfobject, jwplayer)

• improved list/datalist options demo
• small improvements to type="range" and type="date" demo
• fixed animate bug in jQuery 1.8.3
• fixed dutch language

• new UI for all input widgets
• input[type="month"]
• progress element
• list/datalist support for following types: range, month, date (datalist support for text/email/url/tel etc. was already there)
• type="number" can be localized
• type="number"/type="time" are custom styleable in supporting browsers
• video[preload]/audio[preload] for "auto"/"" and "none" values
• labels property for labellable form elements
• stepUp/stepDown methods for input elements