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<!DOCTYPE html>
<title>CSS Anchor Positioning: simple try-tactic with anchor</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#typedef-position-try-fallbacks-try-tactic">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#cb {
position: absolute;
width: 200px;
height: 200px;
border: 1px solid black;
}
#anchor {
position: absolute;
left: 100px;
top: 100px;
width: 50px;
height: 50px;
background-color:red;
anchor-name: --anchor;
}
#target1 {
position: absolute;
width: 100px;
height: 100px;
/* Does not fit ... */
left: anchor(--anchor left);
top: anchor(--anchor bottom);
/* flip-block fits */
position-try-fallbacks: flip-block, flip-inline, flip-block flip-inline;
background-color: coral;
}
#target2 {
position: absolute;
width: 100px;
height: 100px;
/* Does not fit ... */
left: anchor(--anchor right);
top: anchor(--anchor top);
/* flip-inline fits */
position-try-fallbacks: flip-block, flip-inline, flip-block flip-inline;
background-color: blue;
}
#target3 {
position: absolute;
width: 100px;
height: 100px;
/* Does not fit ... */
left: anchor(--anchor right);
top: anchor(--anchor bottom);
/* flip-block flip-inline fits */
position-try-fallbacks: flip-block, flip-inline, flip-block flip-inline;
background-color: green;
}
</style>
<div id=cb>
<div id=anchor></div>
<div id=target1></div>
<div id=target2></div>
<div id=target3></div>
</div>
<script>
test(() => {
let cs = getComputedStyle(target1);
assert_equals(cs.left, '100px');
assert_equals(cs.top, '0px');
}, 'Uses flip-block');
test(() => {
let cs = getComputedStyle(target2);
assert_equals(cs.left, '0px');
assert_equals(cs.top, '100px');
}, 'Uses flip-inline');
test(() => {
let cs = getComputedStyle(target3);
assert_equals(cs.left, '0px');
assert_equals(cs.top, '0px');
}, 'Uses flip-block flip-inline');
</script>
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