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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Transitions Test: transition-duration - negative number</title>
<link rel="author" title="Intel" href="http://www.intel.com">
<link rel="author" title="Shiyou Tan" href="mailto:shiyoux.tan@intel.com">
<link rel="help" title="2.2. The 'transition-duration' Property" href="http://www.w3.org/TR/css3-transitions/#transition-duration-property">
<meta name="assert" content="A negative value for 'transition-duration renders the declaration invalid which means the transition is immediate.">
<style>
div {
height: 100px;
transition-property: width;
transition-timing-function: linear;
width: 100px;
}
#ref {
background-color: yellow;
transition-duration: 2s;
}
#test {
background-color: blue;
transition-duration: -2s;
}
</style>
<body>
<p>Click the 'Start' button below. Test passes if the width of yellow square grows smoothly but the blue grows immediately.</p>
<div id="ref"></div>
<div id="test"></div>
<button>Start</button>
<script>
(function() {
var button = document.querySelector("button"),
test = document.querySelector("#test"),
ref = document.querySelector("#ref");
button.addEventListener("click", function(evt) {
test.setAttribute("style", "width: 200px;");
ref.setAttribute("style", "width: 200px;");
}, false);
})();
</script>
</body>
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