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GeezerVison is showing github.com — wpt/css/cssom/base-uri.html at master · web-platform-tests/wpt

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<!doctype html>
<meta charset="utf-8">
<title>CSSOM base URI is the document's base URI</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:[email protected]">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://html.spec.whatwg.org/#document-base-url">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1343919">
<base href="/non-existent-base/">
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<div id="target"></div>
<script>
const target = document.getElementById("target");
const kRelativeURI = "url(something.png)";
const kKeyframes = [
{ backgroundImage: kRelativeURI },
{ backgroundImage: kRelativeURI },
];
function assertBackground() {
const image = getComputedStyle(target).backgroundImage;
assert_true(image.includes("non-existent-base"), image);
}
function assertNoBackground() {
const image = getComputedStyle(target).backgroundImage;
assert_equals(image, "none");
}
promise_test(async function() {
target.style.backgroundImage = kRelativeURI;
assertBackground();
target.style.backgroundImage = "";
assertNoBackground();
}, "setProperty");
promise_test(async function() {
const keyframe = new KeyframeEffect(target, kKeyframes, 10000);
const animation = new Animation(keyframe, document.timeline);
animation.play();
await animation.ready;
assertBackground();
animation.cancel();
assertNoBackground();
}, "KeyframeEffect constructor");
promise_test(async function() {
const keyframe = new KeyframeEffect(target, [], 10000);
keyframe.setKeyframes(kKeyframes);
const animation = new Animation(keyframe, document.timeline);
animation.play();
await animation.ready;
assertBackground();
animation.cancel();
assertNoBackground();
}, "KeyframeEffect.setKeyframes");
</script>
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