composited-layer-nested.html | Explore in Territory

<!DOCTYPE html>
<style>
.multicol {
    margin: 3em 0;
    width: 60px;
    -webkit-column-width: 20px;
    -webkit-column-gap: 0;
    column-fill: auto;
    height: 60px;
}
.square {
    width: 20px;
    height: 20px;
    background: green;
}

.layer { will-change: transform; }

</style>
<p>If no compositing were present, there should be two green squares below. Since some elements are composited, and therefore not fragmented, the output is different.</p>
<!-- composited layer in composited layer: -->
<div class="multicol">
    <div class="square"></div>
    <div class="layer"> <!-- from first to second column -->
        <div class="square"></div>
        <div class="layer">
            <div class="square"></div>
            <div class="square"></div>
        </div>
        <div class="square"></div>
    </div>
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
    <div class="square"></div>
</div>

<!-- composited layer in composited layer in composited layer: -->
<div class="multicol">
    <div class="layer"> <!-- all columns -->
        <div class="layer"> <!-- from first to second column -->
            <div class="square"></div>
            <div class="square"></div>
            <div class="layer"> <!-- from first to second column -->
                <div class="square"></div>
                <div class="square"></div>
            </div>
        </div>
        <div class="square"></div>
        <div class="layer">  <!-- from second to third column -->
            <div class="layer">  <!-- from second to third column -->
                <div class="square"></div>
                <div class="square"></div>
            </div>
            <div class="square"></div>
            <div class="square"></div>
        </div>
    </div>
</div>
chromium/third_party/blink/web_tests/fast/multicol/composited-layer-nested.html
