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<!DOCTYPE html>
<link rel="help" href="https://github.com/whatwg/html/pull/9144">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
body {
margin: 0;
}
#anchor {
width: 100px;
height: 100px;
margin-left: 50px;
margin-top: 50px;
background: orange;
}
#target {
position: absolute;
left: anchor(right);
top: anchor(top);
width: 100px;
height: 100px;
background: lime;
}
</style>
<div id="anchor"></div>
<div id="target" anchor="anchor"></div>
<script>
test(() => {
assert_equals(target.offsetLeft, 150);
assert_equals(target.offsetTop, 50);
}, 'The anchor attribute should position the target element next to its implicit anchor');
test(() => {
assert_equals(target.anchorElement, anchor);
}, 'The element.anchorElement IDL should reflect the element pointed to by the anchor attribute');
</script>
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