1CSS Element Queries 2=================== 3 4Element Queries is a polyfill adding support for element based media-queries to all new browsers (incl. IE7+). 5It allows not only to define media-queries based on window-size but also adds 'media-queries' functionality depending on element (any selector supported) 6size while not causing performance lags due to event based implementation. 7 8It's a proof-of-concept event-based CSS element dimension query with valid CSS selector syntax. 9 10Features: 11 12 - no performance issues since it listens only on size changes of elements that have element query rules defined through css. Other element query polifills only listen on `window.onresize` which causes performance issues and allows only to detect changes via window.resize event and not inside layout changes like css3 animation, :hover, DOM changes etc. 13 - no interval/timeout detection. Truly event-based through integrated ResizeSensor class. 14 - no CSS modifications. Valid CSS Syntax 15 - all CSS selectors available. Uses regular attribute selector. No need to write rules in HTML. 16 - supports and tested in webkit, gecko and IE(7/8/9/10/11). 17 - `min-width`, `min-height`, `max-width` and `max-height` are supported so far 18 - works with any layout modifications: HTML (innerHTML etc), inline styles, DOM mutation, CSS3 transitions, fluid layout changes (also percent changes), pseudo classes (:hover etc.), window resizes and more 19 - no Javascript-Framework dependency (works with jQuery, Mootools, etc.) 20 21More demos and information: http://marcj.github.io/css-element-queries/ 22 23Example 24------- 25 26```css 27.widget-name { 28 padding: 25px; 29} 30.widget-name[max-width="200px"] { 31 padding: 0; 32} 33.widget-name[min-width="500px"] { 34 padding: 55px; 35} 36 37/* responsive images */ 38.responsive-image img { 39 width: 100%; 40} 41 42.responsive-image[max-width^='400px'] img { 43 content: url(demo/image-400px.jpg); 44} 45 46.responsive-image[max-width^='1000px'] img { 47 content: url(demo/image-1000px.jpg); 48} 49 50.responsive-image[min-width='1000px'] img { 51 content: url(demo/image-full.jpg); 52} 53``` 54 55Include the javascript files at the bottom and you're good to go. No custom javascript calls needed. 56 57```html 58<script src="src/ResizeSensor.js"></script> 59<script src="src/ElementQueries.js"></script> 60``` 61 62Issues 63------ 64 65 - So far does not work on `img` and other elements that can't contain other elements. Wrapping with a `div` works fine though (See demo). 66 - Adds additional hidden elements into selected target element and forces target element to be relative or absolute. 67 68 69[](https://bitdeli.com/free "Bitdeli Badge") 70 71 72License 73------- 74MIT license. Copyright [Marc J. Schmidt](http://marcjschmidt.de/). 75
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