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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-transitions/transition-behavior.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<link rel=author href="mailto:jarhar@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/css-animations/support/testcommon.js"></script>
<div class=testcase id=discrete>Allow discrete</div>
<div class=testcase id=normal>No discrete</div>
<style>
.testcase {
float: left;
width: 100px;
height: 100px;
transition: all 1s;
}
#discrete {
transition-behavior: allow-discrete;
}
.animated {
float: right;
}
</style>
<script>
promise_test(async () => {
await waitForAnimationFrames(2);
normal.classList.add('animated');
const normalAnims = normal.getAnimations();
assert_equals(normalAnims.length, 0,
"Should not start a discrete property transition");
discrete.classList.add('animated');
const anims = discrete.getAnimations();
assert_equals(anims.length, 1,
"Should start a discrete property transition");
assert_equals(anims[0].transitionProperty, 'float');
}, 'transition-behavior:allow-discrete should animate discrete properties.');
promise_test(async t => {
const div = addDiv(t, {
style: 'transition: all 1s normal, float 1s allow-discrete; float: left',
});
getComputedStyle(div).float;
div.style.float = 'right';
const anims = div.getAnimations();
assert_equals(anims.length, 1,
"Should start a discrete property transition");
}, 'transition-behavior:allow-discrete overlaps the previous normal value.');
promise_test(async t => {
const div = addDiv(t, {
style: 'transition: all 1s allow-discrete, float 1s normal; float: left',
});
getComputedStyle(div).float;
div.style.float = 'right';
const anims = div.getAnimations();
assert_equals(anims.length, 0,
"Should not start a discrete property transition");
}, 'transition-behavior:normal overlaps the previous allow-discrete value.');
promise_test(async t => {
const div = addDiv(t, {
style: 'transition: position 1s allow-discrete; position: relative',
});
getComputedStyle(div).position;
div.style.position = 'static';
assert_equals(div.getAnimations().length, 1,
"Should start a discrete property transition");
div.style.transitionBehavior = "normal";
div.style.position = 'absolute';
assert_equals(getComputedStyle(div).position, "absolute");
assert_equals(div.getAnimations().length, 0,
"The running transition should be cancelled");
}, 'transition-behavior changed to normal should stop the running discrete ' +
'transitions.');
promise_test(async t => {
const div = addDiv(t, {
style: 'transition: clip-path 5s normal; clip-path: circle(50px)',
});
getComputedStyle(div).transition;
div.style.clipPath = "circle(farthest-side)";
assert_equals(getComputedStyle(div).clipPath, "circle(farthest-side)");
assert_equals(div.getAnimations().length, 0,
"Should not start a transition of discrete animation values");
div.style.transitionBehavior = "allow-discrete";
div.style.clipPath = "circle(200px)";
assert_equals(getComputedStyle(div).clipPath, "circle(farthest-side)");
assert_equals(div.getAnimations().length, 1,
"Should start a transition for discrete animation values");
}, 'transition-behavior:allow-discrete should animate for values fallback to ' +
'discrete animations.');
promise_test(async t => {
const div = addDiv(t, {
style: 'transition: clip-path 5s allow-discrete; clip-path: circle(50px)',
});
getComputedStyle(div).transition;
div.style.clipPath = "circle(farthest-side)";
assert_equals(getComputedStyle(div).clipPath, "circle(50px)");
assert_equals(div.getAnimations().length, 1,
"Should start a transition for discrete animation values");
div.style.transitionBehavior = "normal";
div.style.clipPath = "ellipse()";
assert_equals(getComputedStyle(div).clipPath, "ellipse()");
assert_equals(div.getAnimations().length, 0,
"The running transition should be cancelled");
}, 'transition-behavior:normal should cancel the running transitions whose ' +
'animation values are not interpolatable');
</script>