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49 lines
1.6 KiB
HTML
49 lines
1.6 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>CSS Transitions Test: transition-property - background-position</title>
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<link rel="author" title="Zhuoyu Qian" href="mailto:zhuoyu.qian@samsung.com">
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<link rel="help" href="https://drafts.csswg.org/web-animations-1/#animation-type">
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<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-position">
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<meta name="assert" content="Test checks that the 'background-position' property with edge offset is animatable.">
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<script src="/resources/testharness.js" type="text/javascript"></script>
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<script src="/resources/testharnessreport.js" type="text/javascript"></script>
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<style>
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#test {
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border: 1px solid;
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background-image: url("support/cat.png");
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background-repeat: no-repeat;
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height: 200px;
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transition-duration: 100s;
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transition-property: background-position;
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transition-timing-function: step-end;
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}
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</style>
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<body>
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<div id="test"></div>
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</body>
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<script>
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var startValue = "left 10px top 10px";
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var endValue = "right 10px bottom 10px";
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var div = document.getElementById("test");
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// getComputedStyle helper
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function gCS(aProperty) {
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return document.defaultView
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.getComputedStyle(div, "")
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.getPropertyValue(aProperty);
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}
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(function() {
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div.style.backgroundPosition = startValue;
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// flush styles
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gCS("background-position");
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// set property to endValue
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div.setAttribute("style", "background-position: " + endValue);
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test(function() {
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assert_true(gCS("background-position") != endValue);
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}, "background-position not equals to end value");
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})();
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</script>
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