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https://github.com/servo/servo.git
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203 lines
5.9 KiB
HTML
203 lines
5.9 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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<title>CSS Transitions Test: Transitions do not run for a disconnected element</title>
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<meta name="assert" content="If an element is not in the document during that
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style change event or was not in the document during the previous style change
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event, then transitions are not started for that element in that style change
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event.">
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<meta name="assert" content="If an element is no longer in the document,
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implementations must cancel any running transitions on it and remove transitions
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on it from the completed transitions.">
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<link rel="help" title="Starting transitions"
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href="https://drafts.csswg.org/css-transitions/#starting">
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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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<script src="./support/helper.js" type="text/javascript"></script>
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</head>
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<body>
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<div id="log"></div>
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<script>
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promise_test(async t => {
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// Create element but do not attach it to the document
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const div = addDiv(t, {
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style: 'transition: background-color 100s; background-color: red',
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});
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// Resolve before-change style
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getComputedStyle(div).backgroundColor;
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// Set up after-change style
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div.style.backgroundColor = 'green';
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assert_equals(
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getComputedStyle(div).backgroundColor,
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'rgb(255, 0, 0)',
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'No transition should run'
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);
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// Wait a frame just to be sure the UA does not start the transition on the
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// next frame.
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await waitForFrame();
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assert_equals(
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getComputedStyle(div).backgroundColor,
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'rgb(255, 0, 0)',
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'No transition should run even after waiting a frame'
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);
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}, 'Transitions do not run on an element not in the document');
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test(t => {
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// Create element but do not attach it to the document
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const div = addDiv(t, {
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style: 'transition: background-color 100s; background-color: red',
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});
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// Resolve before-change style
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getComputedStyle(div).backgroundColor;
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// Add to document
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document.documentElement.append(div);
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// Set up after-change style
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div.style.backgroundColor = 'green';
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assert_equals(
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getComputedStyle(div).backgroundColor,
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'rgb(0, 128, 0)',
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'No transition should run'
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);
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}, 'Transitions do not run for an element newly added to the document');
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promise_test(async t => {
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// Create element and attach it to the document
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const div = addDiv(t, {
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style: 'transition: background-color 100s; background-color: red',
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});
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document.documentElement.append(div);
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// Attach event listeners
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div.addEventListener('transitionrun', t.step_func(() => {
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assert_unreached('transitionrun event should not be fired');
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}));
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// Resolve before-change style
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getComputedStyle(div).backgroundColor;
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// Set up after-change style
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div.style.backgroundColor = 'green';
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// But remove the document before the next style change event
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div.remove();
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// There should be no events received for the triggered transition.
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//
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// (We can't verify the presence/absence of transitions by querying
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// getComputedStyle for this case because it will return an empty string.)
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await waitForFrame();
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await waitForFrame();
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}, 'Transitions do not run for an element newly removed from the document');
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promise_test(async t => {
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// Create element and attach it to the document
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const div = addDiv(t, {
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style: 'transition: background-color 100s; background-color: red',
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});
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document.documentElement.append(div);
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// Attach event listeners
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const eventWatcher = new EventWatcher(t, div, [
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'transitionrun',
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'transitioncancel',
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]);
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// Trigger transition
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getComputedStyle(div).backgroundColor;
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div.style.backgroundColor = 'green';
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getComputedStyle(div).backgroundColor;
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await eventWatcher.wait_for('transitionrun');
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// Remove the element from the document
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div.remove();
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await eventWatcher.wait_for('transitioncancel');
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}, 'Transitions are canceled when an element is removed from the document');
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promise_test(async t => {
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// Create a container element. We'll need this later.
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const container = addDiv(t);
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document.documentElement.append(container);
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// Create element and attach it to the document
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const div = addDiv(t, {
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style: 'transition: background-color 100s; background-color: red',
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});
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document.documentElement.append(div);
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// Attach event listeners
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const eventWatcher = new EventWatcher(t, div, [
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'transitionrun',
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'transitioncancel',
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]);
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// Trigger transition
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getComputedStyle(div).backgroundColor;
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div.style.backgroundColor = 'green';
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getComputedStyle(div).backgroundColor;
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await eventWatcher.wait_for('transitionrun');
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// Re-parent element
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container.append(div);
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await eventWatcher.wait_for('transitioncancel');
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assert_equals(
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getComputedStyle(div).backgroundColor,
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'rgb(0, 128, 0)',
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'There should be no transition after re-parenting'
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);
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}, 'Transitions are canceled when an element is re-parented');
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promise_test(async t => {
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// Create a container element. We'll need this later.
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const container = addDiv(t);
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document.documentElement.append(container);
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// Create element and attach it to the document
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const div = addDiv(t, {
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style: 'transition: background-color 100s; background-color: red',
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});
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document.documentElement.append(div);
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// Attach event listeners
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const eventWatcher = new EventWatcher(t, div, [
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'transitionrun',
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'transitioncancel',
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]);
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// Trigger transition
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getComputedStyle(div).backgroundColor;
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div.style.backgroundColor = 'green';
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getComputedStyle(div).backgroundColor;
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await eventWatcher.wait_for('transitionrun');
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// Re-parent element to same container
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document.documentElement.append(div);
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await eventWatcher.wait_for('transitioncancel');
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assert_equals(
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getComputedStyle(div).backgroundColor,
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'rgb(0, 128, 0)',
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'There should be no transition after re-parenting'
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);
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}, 'Transitions are canceled when an element is re-parented to the same node');
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</script>
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</body>
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</html>
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