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<!doctype html>
<html>
<head>
<meta charset=utf-8>
<title>CSS Transitions Test: Transitions do not run for an element that is not being rendered</title>
<link rel="help" title="Starting transitions"
href="https://drafts.csswg.org/css-transitions/#starting">
<script src="/resources/testharness.js" type="text/javascript"></script>
<script src="/resources/testharnessreport.js" type="text/javascript"></script>
<script src="./support/helper.js" type="text/javascript"></script>
</head>
<body>
<div id="log"></div>
<script>
promise_test(async t => {
// Create element that is not rendered
const div = addDiv(t, {
style:
'transition: background-color 100s;' +
'background-color: red;' +
'display: none',
});
// Attach event listeners
div.addEventListener(
'transitionrun',
t.step_func(() => {
assert_unreached('transitionrun event should not be fired');
})
);
// Resolve before-change style
getComputedStyle(div).backgroundColor;
// Set up and resolve after-change style
div.style.backgroundColor = 'green';
getComputedStyle(div).backgroundColor;
// There should be no events received for the triggered transition.
await waitForFrame();
await waitForFrame();
}, 'Transitions do not run on an element not being rendered');
test(t => {
// Create element that is not rendered
const div = addDiv(t, {
style:
'transition: background-color 100s;' +
'background-color: red;' +
'display: none',
});
// Resolve before-change style
getComputedStyle(div).backgroundColor;
// Make it rendered
div.style.display = 'block';
// Set up and resolve after-change style
div.style.backgroundColor = 'green';
getComputedStyle(div).backgroundColor;
// We should have jumped immediately to the after-change style rather than
// transitioning to it.
assert_equals(
getComputedStyle(div).backgroundColor,
'rgb(0, 128, 0)',
'No transition should run'
);
}, 'Transitions do not run for an element newly rendered');
promise_test(async t => {
// Create element
const div = addDiv(t, {
style: 'transition: background-color 100s; background-color: red',
});
// Attach event listeners
div.addEventListener('transitionrun', t.step_func(() => {
assert_unreached('transitionrun event should not be fired');
}));
// Resolve before-change style
getComputedStyle(div).backgroundColor;
// Set up after-change style
div.style.backgroundColor = 'green';
// But make the element non-rendered
div.style.display = 'none';
// There should be no events received for the triggered transition.
await waitForFrame();
await waitForFrame();
}, 'Transitions do not run for an element newly made not rendered');
promise_test(async t => {
// Create element
const div = addDiv(t, {
style: 'transition: background-color 100s; background-color: red',
});
// Attach event listeners
const eventWatcher = new EventWatcher(t, div, [
'transitionrun',
'transitioncancel',
]);
// Trigger transition
getComputedStyle(div).backgroundColor;
div.style.backgroundColor = 'green';
getComputedStyle(div).backgroundColor;
await eventWatcher.wait_for('transitionrun');
// Make the element no longer rendered
div.style.display = 'none';
await eventWatcher.wait_for('transitioncancel');
}, 'Transitions are canceled when an element is no longer rendered');
</script>
</body>
</html>
|
