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<!DOCTYPE html>
<title>The animation-timeline: view() notation</title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
<link rel="help" src="https://w3c.github.io/csswg-drafts/scroll-animations-1/#view-notation">
<link rel="help" src="https://github.com/w3c/csswg-drafts/issues/7587">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="support/testcommon.js"></script>
<style>
@keyframes fade-in-out {
enter 0% { opacity: 0; }
enter 100% { opacity: 1; }
exit 0% { opacity: 1; }
exit 100% { opacity: 0; }
}
@keyframes fade-out {
exit 0% { opacity: 1; }
exit 100% { opacity: 0; }
}
@keyframes change-font-size {
exit 0% { font-size: 10px; }
exit 100% { font-size: 20px; }
}
#container {
width: 200px;
height: 200px;
overflow-y: scroll;
overflow-x: hidden;
}
.target {
width: 100px;
height: 100px;
background-color: red;
}
.content {
width: 400px;
height: 400px;
background-color: blue;
}
</style>
<body>
<script>
"use strict";
setup(assert_implements_animation_timeline);
const createTargetWithStuff = function(t, divClasses) {
let container = document.createElement('div');
container.id = 'container';
document.body.appendChild(container);
// *** When testing inset
// <div id='container'>
// <div class='content'></div>
// <div class='target'></div>
// <div class='content'></div>
// </div>
// *** When testing axis
// <div id='container'>
// <div class='target'></div>
// <div class='content'></div>
// </div>
let divs = [];
let target;
for(let className of divClasses) {
let div = document.createElement('div');
div.className = className;
container.appendChild(div);
divs.push(div);
if(className === 'target')
target = div;
}
if (t && typeof t.add_cleanup === 'function') {
t.add_cleanup(() => {
for(let div of divs)
div.remove();
container.remove();
});
}
return [container, target];
};
async function scrollLeft(element, value) {
element.scrollLeft = value;
await waitForNextFrame();
}
async function scrollTop(element, value) {
element.scrollTop = value;
await waitForNextFrame();
}
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['content', 'target', 'content']);
div.style.animation = "fade-in-out 1s linear";
div.style.animationTimeline = "view()";
await scrollTop(container, 200);
assert_equals(getComputedStyle(div).opacity, '0', 'At enter 0%');
await scrollTop(container, 250);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At enter 50%');
await scrollTop(container, 300);
assert_equals(getComputedStyle(div).opacity, '1', 'At enter 100%');
await scrollTop(container, 400);
assert_equals(getComputedStyle(div).opacity, '1', 'At exit 0%');
await scrollTop(container, 450);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollTop(container, 500);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
}, 'animation-timeline: view()');
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['content', 'target', 'content']);
div.style.animation = "fade-in-out 1s linear";
div.style.animationTimeline = "view(50px)";
await scrollTop(container, 250);
assert_equals(getComputedStyle(div).opacity, '0', 'At enter 0%');
await scrollTop(container, 300);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At enter 50%');
await scrollTop(container, 350);
assert_equals(getComputedStyle(div).opacity, '1', 'At enter 100% & exit 0%');
await scrollTop(container, 400);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollTop(container, 450);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
}, 'animation-timeline: view(50px)');
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['content', 'target', 'content']);
div.style.animation = "fade-in-out 1s linear";
div.style.animationTimeline = "view(auto 50px)";
await scrollTop(container, 250);
assert_equals(getComputedStyle(div).opacity, '0', 'At enter 0%');
await scrollTop(container, 300);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At enter 50%');
await scrollTop(container, 350);
assert_equals(getComputedStyle(div).opacity, '1', 'At enter 100%');
await scrollTop(container, 400);
assert_equals(getComputedStyle(div).opacity, '1', 'At exit 0%');
await scrollTop(container, 450);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollTop(container, 500);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
}, 'animation-timeline: view(auto 50px)');
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['target', 'content']);
container.style.overflow = 'scroll';
div.style.animation = "fade-out 1s linear";
div.style.animationTimeline = "view(inline)";
await scrollLeft(container, 0);
assert_equals(getComputedStyle(div).opacity, '1', 'At exit 0%');
await scrollLeft(container, 50);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollLeft(container, 100);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
}, 'animation-timeline: view(inline)');
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['target', 'content']);
container.style.overflow = 'scroll';
div.style.animation = "fade-out 1s linear";
div.style.animationTimeline = "view(horizontal)";
await scrollLeft(container, 0);
assert_equals(getComputedStyle(div).opacity, '1', 'At exit 0%');
await scrollLeft(container, 50);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollLeft(container, 100);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
}, 'animation-timeline: view(horizontal)');
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['target', 'content']);
container.style.overflow = 'scroll';
div.style.animation = "fade-out 1s linear";
div.style.animationTimeline = "view(vertical)";
await scrollTop(container, 0);
assert_equals(getComputedStyle(div).opacity, '1', 'At exit 0%');
await scrollTop(container, 50);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollTop(container, 100);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
}, 'animation-timeline: view(vertical)');
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['target', 'content']);
container.style.overflowY = 'hidden';
container.style.overflowX = 'scroll';
div.style.animation = "fade-out 1s linear";
div.style.animationTimeline = "view(horizontal 50px)";
await scrollLeft(container, 0);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollLeft(container, 50);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
}, 'animation-timeline: view(horizontal 50px)');
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['target', 'content']);
container.style.overflow = 'scroll';
div.style.animation = "fade-out 1s linear, change-font-size 1s linear";
div.style.animationTimeline = "view(), view(inline)";
await scrollLeft(container, 0);
assert_equals(getComputedStyle(div).fontSize, '10px', 'At exit 0% inline');
await scrollLeft(container, 50);
assert_equals(getComputedStyle(div).fontSize, '15px', 'At exit 50% inline');
await scrollLeft(container, 100);
assert_equals(getComputedStyle(div).fontSize, '20px', 'At exit 100% inline');
await scrollLeft(container, 0);
await scrollTop(container, 0);
assert_equals(getComputedStyle(div).opacity, '1', 'At exit 0% block');
await scrollTop(container, 50);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50% block');
await scrollTop(container, 100);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100% block');
await scrollLeft(container, 50);
await scrollTop(container, 50);
assert_equals(getComputedStyle(div).fontSize, '15px', 'At exit 50% inline');
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50% block');
}, 'animation-timeline: view(), view(inline)');
promise_test(async t => {
let [container, div] = createTargetWithStuff(t, ['target', 'content']);
container.style.overflowY = 'hidden';
container.style.overflowX = 'scroll';
div.style.animation = "fade-out 1s linear";
div.style.animationTimeline = "view(inline)";
await scrollLeft(container, 0);
assert_equals(getComputedStyle(div).opacity, '1', 'At exit 0%');
await scrollLeft(container, 50);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollLeft(container, 100);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
div.style.animationTimeline = "view(inline 50px)";
await scrollLeft(container, 0);
assert_equals(getComputedStyle(div).opacity, '0.5', 'At exit 50%');
await scrollLeft(container, 50);
assert_equals(getComputedStyle(div).opacity, '0', 'At exit 100%');
}, 'animation-timeline: view(inline) changes to view(inline 50px)');
</script>
</body>
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