87 lines
2.4 KiB
HTML
87 lines
2.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Test start skip and then start on a view transition</title>
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<link rel="help" href="https://www.w3.org/TR/css-view-transitions-1/">
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</head>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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:root {
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view-transition-name: none;
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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: blue;
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contain: paint;
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view-transition-name: target;
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}
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#target.update-1 {
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height: 150px;
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}
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#target.update-2 {
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height: 200px;
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}
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</style>
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<body>
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<div id="target"></div>
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</body>
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<script>
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promise_test(async t => {
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let rejected_promise_tally = 0;
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const target = document.getElementById("target");
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assert_implements(document.startViewTransition,
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"Missing document.startViewTransition");
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const verifyAbortedTransition = (promise) => {
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return promise.then(
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() => { assert_not_reached('transition aborted') },
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(reason) => {
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assert_true(reason instanceof DOMException);
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assert_equals(reason.code, DOMException.ABORT_ERR);
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rejected_promise_tally++;
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});
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};
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const vt1 = document.startViewTransition(() => {
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target.className = 'update-1';
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});
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vt1.skipTransition();
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const vt2 = document.startViewTransition(() => {
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assert_equals(target.className, 'update-1');
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target.className = 'update-2';
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});
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vt2.skipTransition();
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const vt3 = document.startViewTransition(() => {
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assert_equals(target.className, 'update-2');
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});
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await verifyAbortedTransition(vt1.ready);
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await verifyAbortedTransition(vt2.ready);
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await vt3.ready;
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assert_equals(rejected_promise_tally, 2,
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'first 2 transitions were skipped');
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const sizeTransformAnimations = document.getAnimations().filter(a => {
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return 'height' in a.effect.getKeyframes()[0];
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});
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assert_equals(sizeTransformAnimations.length, 1);
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const startingHeight =
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sizeTransformAnimations[0].effect.getKeyframes()[0].height;
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assert_equals(startingHeight, '200px',
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'Height change applied before capture');
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}, 'Synchronously starting a view transition blocks on DOM callback for ' +
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'previously skipped transitions');
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</script>
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</html>
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