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<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-transitions/#starting">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
div { height: inherit; }
#outer { height: 50px; }
#outer.collapsed {
height: 0px;
transition: height 0.01s;
}
</style>
<div id="outer">
<div>
<div id="inner">You should only see a flash of red.</div>
</div>
</div>
<script>
promise_test(t => {
outer.offsetTop;
outer.className = "collapsed";
return (new Promise((resolve) => outer.addEventListener("transitionend", resolve))).then(() => {
assert_equals(getComputedStyle(inner).height, "0px");
});
}, "Transitioned height, explicitly inherited down two DOM levels, should inherit correctly");
</script>
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