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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>Include display:contents elements recursively when calculating bounding rect for a ranges</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="container">
<div id="spacerBefore">spacer before</div>
<div style="display:contents">
<div style="height:30px; background:lightblue">
HEIGHT: 30px
</div>
<div style="display:contents">
<div style="display:contents">
<div style="height:30px; background:lightblue">
HEIGHT: 30px
</div>
</div>
</div>
</div>
<div id="spacerAfter">spacer after</div>
</div>
<script>
test(function () {
const spacerBefore = document.getElementById("spacerBefore");
const spacerAfter = document.getElementById("spacerAfter");
const expected = spacerAfter.getBoundingClientRect().top - spacerBefore.getBoundingClientRect().bottom;
const rangeBetweenSpacers = document.createRange();
rangeBetweenSpacers.setStartAfter(spacerBefore);
rangeBetweenSpacers.setEndBefore(spacerAfter);
const actual = rangeBetweenSpacers.getBoundingClientRect().height;
assert_true(actual > 0, "range has vertical height");
assert_equals(expected, actual, "range.getBoundingClientRect().height");
}, "the space between elements using a range should be the same as using another method")
</script>