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<!doctype html>
<meta charset=utf-8>
<title>Not canceling a CSS transition</title>
<link rel="help" href="https://drafts.csswg.org/css-transitions/#starting">
<!-- TODO: Add a more specific link for this once it is specified. -->
<link rel="help" href="https://drafts.csswg.org/css-transitions-2/#csstransition">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/helper.js"></script>
<div id="log"></div>
<script>
'use strict';
const runDisplayNoneTransitionTest = displayTransitionStyle => {
promise_test(async t => {
const div = addDiv(t, { style: 'margin-left: 0px' });
getComputedStyle(div).marginLeft;
div.style.transition = 'margin-left 100s';
div.style.marginLeft = '1000px';
const transition = div.getAnimations()[0];
await transition.ready;
await waitForFrame();
assert_not_equals(getComputedStyle(div).marginLeft, '1000px',
'transform style is animated before setting "display: none"');
div.style.transition = `${div.style.transition}, ${displayTransitionStyle}`;
div.style.display = 'none';
assert_not_equals(getComputedStyle(div).marginLeft, '1000px',
'transform style is animated after setting "display: none"');
}, `Setting "display: none" with "display" set to transition using "${displayTransitionStyle}" does not cancel running transitions`);
};
runDisplayNoneTransitionTest('display 100s allow-discrete');
runDisplayNoneTransitionTest('display 100s, all allow-discrete 100s');
</script>
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