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<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/cssom-view-1/#extensions-to-the-htmlelement-interface">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style>
.container {
position: relative;
width: 8em;
height: 7em;
padding: 1em;
}
</style>
<div class="container" style="writing-mode:horizontal-tb;">
<br><span>ref</span><span class="target"> </span>
</div>
<div class="container" style="writing-mode:vertical-lr;">
<br><span>ref</span><span class="target"> </span>
</div>
<div class="container" style="writing-mode:vertical-rl;">
<br><span>ref</span><span class="target"> </span>
</div>
<script>
var i = 0;
document.querySelectorAll('span.target').forEach((target) => {
var ref = target.previousSibling;
test(() => {
assert_equals(target.offsetLeft,
ref.offsetLeft + (i ? 0 : ref.offsetWidth),
'offsetLeft');
assert_equals(target.offsetTop,
ref.offsetTop + (i ? ref.offsetHeight : 0),
'offsetTop');
}, 'offsetTop/Left of empty inline elements should work as if they were not empty: ' + i);
i++;
});
</script>
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