42 lines
1.2 KiB
HTML
42 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<style>
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:root {
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--custom-color: blue;
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}
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.target {
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width: 100px;
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height: 100px;
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background: linear-gradient(var(--custom-color), green);
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transition-duration: 1s;
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}
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.target.transition {
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margin-left: 100px;
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}
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</style>
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<body>
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<script src="../resources/testharness.js"></script>
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<script src="../resources/testharnessreport.js"></script>
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<script>
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'use strict';
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promise_test(async test => {
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const target = document.body.appendChild(document.createElement("div"));
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target.classList.add("target");
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await new Promise(requestAnimationFrame);
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target.classList.add("transition");
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const animations = target.getAnimations();
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assert_equals(animations.length, 1, "There is only one animation applied to the target.");
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assert_true(animations[0] instanceof CSSTransition, "The single animation applied to the target is a CSS transition.");
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assert_equals(animations[0].transitionProperty, "margin-left", "The single CSS transition applied to the target is for the margin-left property.");
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}, `An element with a background-image set to a CSS gradient with a stop color set by a custom property does not yield a background-image transition when another CSS property changes.`);
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</script>
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</body> |