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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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-webkit-transition-property: width, height, top, left, opacity;
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-webkit-transition-duration: 1s;
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-moz-transition-property: width, height, top, left, opacity;
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-moz-transition-duration: 1s;
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<div id="demo">this is a demo</div>
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<script type="text/javascript">
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var node = document.getElementById('demo'),
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computed = getComputedStyle(node, '');
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console.log(computed['MozTransitionProperty']);
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node.addEventListener('webkitTransitionEnd', function(e) {
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console.log(e.propertyName);
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console.log(e.elapsedTime);
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console.log(node.style[e.propertyName]);
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document.onclick = function() {
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var w = parseFloat(computed.width) + 100;
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node.style.width = w + 'px';