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<!DOCTYPE html>
<title>position-try-fallbacks with flip-block and flip-inline</title>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-anchor-position/#position-try-fallbacks">
<link rel="help" href="https://issues.chromium.org/issues/400761086">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/test-common.js"></script>
<style>
#anchor {
anchor-name: --a;
margin-top: 200px;
margin-left: 100px;
width: 150px;
height: 50px;
background: blue;
}
#anchored {
position: absolute;
position-anchor: --a;
position-area: top left;
position-try-fallbacks: flip-inline, flip-block, flip-block flip-inline;
width: 100%;
height: 100%;
background: hotpink;
}
</style>
<div id="scroller" style="position:relative; overflow:hidden; width:400px; height:400px;">
<div id="anchor"></div>
<div style="width:1000px; height:1000px;"></div>
<div id="anchored"></div>
</div>
<script>
promise_test(async () => {
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
assert_equals(anchored.offsetLeft, 0);
assert_equals(anchored.offsetTop, 0);
assert_equals(anchored.offsetWidth, 100);
assert_equals(anchored.offsetHeight, 200);
}, 'initial position');
promise_test(async () => {
scroller.scrollTo(0, 10);
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
assert_equals(anchored.offsetLeft, 0);
assert_equals(anchored.offsetTop, 250);
assert_equals(anchored.offsetWidth, 100);
assert_equals(anchored.offsetHeight, 160);
}, 'Scroll down to 0,10');
promise_test(async () => {
scroller.scrollTo(10, 10);
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
assert_equals(anchored.offsetLeft, 250);
assert_equals(anchored.offsetTop, 10);
assert_equals(anchored.offsetWidth, 160);
assert_equals(anchored.offsetHeight, 190);
}, 'Scroll right to 10,10');
promise_test(async () => {
scroller.scrollTo(10, 0);
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
assert_equals(anchored.offsetLeft, 250);
assert_equals(anchored.offsetTop, 10);
assert_equals(anchored.offsetWidth, 160);
assert_equals(anchored.offsetHeight, 190);
}, 'Scroll up to 10,0');
promise_test(async () => {
scroller.scrollTo(10, 20);
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
assert_equals(anchored.offsetLeft, 10);
assert_equals(anchored.offsetTop, 250);
assert_equals(anchored.offsetWidth, 90);
assert_equals(anchored.offsetHeight, 170);
}, 'Scroll down to 10,20');
promise_test(async () => {
scroller.scrollTo(101, 20);
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
assert_equals(anchored.offsetLeft, 250);
assert_equals(anchored.offsetTop, 20);
assert_equals(anchored.offsetWidth, 251);
assert_equals(anchored.offsetHeight, 180);
}, 'Scroll down to 101,20');
promise_test(async () => {
scroller.scrollTo(101, 30);
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
assert_equals(anchored.offsetLeft, 250);
assert_equals(anchored.offsetTop, 250);
assert_equals(anchored.offsetWidth, 251);
assert_equals(anchored.offsetHeight, 180);
}, 'Scroll down to 101,30');
</script>
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