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<!DOCTYPE html>
<title>@position-try with container query responding to fallback widths</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#fallback">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#relative {
background: maroon;
position: relative;
width: 195px;
height: 200px;
}
#target1 {
container-type: inline-size;
container-name: target1;
position-try-fallbacks: --fallback1;
background: green;
position: absolute;
top: 0px;
left: 999999px; /* force fallback */
width: 100px;
height: 100px;
}
@position-try --fallback1 {
top: 100px;
left: 0px;
width: 150px;
}
@container (width > 100px) {
#inner1 {
background-color: lime;
width: 100px;
height: 100px;
}
}
#target2 {
container-type: inline-size;
container-name: target2;
position-try-fallbacks: --fallback2, --fallback3;
background: orange;
position: absolute;
top: 0px;
left: 999999px; /* force fallback */
width: 100px;
}
@position-try --fallback2 {
top: 100px;
left: 0px;
width: 150px;
}
@position-try --fallback3 {
top: 0px;
left: 0px;
width: 150px;
}
@container target2 (width = 150px) {
#inner2 {
background-color: yellow;
width: 100px;
height: 150px;
}
}
</style>
<div id="relative">
<div id="target1">
<div id="inner1"></div>
</div>
<div id="target2">
<div id="inner2"></div>
</div>
</div>
<script>
test(() => {
assert_equals(getComputedStyle(inner1).backgroundColor, "rgb(0, 255, 0)");
assert_equals(getComputedStyle(inner1).width, "100px");
assert_equals(getComputedStyle(inner1).height, "100px");
assert_equals(getComputedStyle(target1).top, "100px");
assert_equals(getComputedStyle(target1).left, "0px");
assert_equals(getComputedStyle(target1).width, "150px");
}, "Size container query responds to fallback width");
test(() => {
assert_equals(getComputedStyle(inner2).backgroundColor, "rgb(255, 255, 0)");
assert_equals(getComputedStyle(inner2).width, "100px");
assert_equals(getComputedStyle(inner2).height, "150px");
assert_equals(getComputedStyle(target2).top, "0px");
assert_equals(getComputedStyle(target2).left, "0px");
assert_equals(getComputedStyle(target2).width, "150px");
}, "Size container query responds to fallback width and applies height to not fit the first fallback");
</script>
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