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<!doctype html>
<title>CSS Container Queries Test: font-relative units</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#size-container">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
:root { font-size: 10px; line-height: 10px; }
#em_container {
container-type: inline-size;
width: 100px;
font-size: 100px;
}
#ex_container {
container-type: inline-size;
font-size: 50px;
width: 10ex;
height: 50rex;
}
#ch_container {
container-type: inline-size;
font-size: 50px;
width: 10ch;
}
#ic_container {
container-type: inline-size;
font-size: 50px;
width: 10ic;
}
#lh_container {
container-type: inline-size;
line-height: 50px;
width: 10lh;
}
@container (width: 1em) {
#em_test { color: green }
}
@container (width: 10rem) {
#rem_test { color: green }
}
@container (width: 10ex) {
#ex_test { color: green }
}
@container (49rex <= width <= 100rex) {
#rex_test { color: green }
}
@container (width: 10ch) {
#ch_test { color: green }
}
@container (width: 50rch) {
#rch_test { color: green }
}
@container (width: 10ic) {
#ic_test { color: green }
}
@container (width: 50ric) {
#ric_test { color: green }
}
@container (width: 10lh) {
#lh_test { color: green }
}
@container (width: 50rlh) {
#rlh_test { color: green }
}
</style>
<div id="em_container">
<div id="em_test"></div>
<div id="rem_test"></div>
</div>
<div id="ex_container">
<div id="ex_test"></div>
<div id="rex_test"></div>
</div>
<div id="ch_container">
<div id="ch_test"></div>
<div id="rch_test"></div>
</div>
<div id="ic_container">
<div id="ic_test"></div>
<div id="ric_test"></div>
</div>
<div id="lh_container">
<div id="lh_test"></div>
<div id="rlh_test"></div>
</div>
<script>
setup(() => assert_implements_container_queries());
const green = "rgb(0, 128, 0)";
test(() => assert_equals(getComputedStyle(em_test).color, green), "em relative inline-size");
test(() => assert_equals(getComputedStyle(rem_test).color, green), "rem relative inline-size");
test(() => assert_equals(getComputedStyle(ex_test).color, green), "ex relative inline-size");
test(() => assert_equals(getComputedStyle(rex_test).color, green), "rex relative inline-size");
test(() => assert_equals(getComputedStyle(ch_test).color, green), "ch relative inline-size");
test(() => assert_equals(getComputedStyle(rch_test).color, green), "rch relative inline-size");
test(() => assert_equals(getComputedStyle(ic_test).color, green), "ic relative inline-size");
test(() => assert_equals(getComputedStyle(ric_test).color, green), "ric relative inline-size");
test(() => assert_equals(getComputedStyle(lh_test).color, green), "lh relative inline-size");
test(() => assert_equals(getComputedStyle(rlh_test).color, green), "rlh relative inline-size");
</script>
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