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<!DOCTYPE html>
<html lang=en class="reftest-wait">
<meta charset="utf-8">
<title>CSS Grid Layout Test: Absolute positioning changing containing block</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-grid-1/#abspos" title="9. Absolute Positioning">
<link rel="match" href="absolute-positioning-changing-containing-block-001-ref.html">
<meta name="assert" content="This test checks that absolutelly positioned children of a grid are properly sized when the containing block switches between the grid container and a grid ancestor.">
<style>
.wrapper {
width: 100px;
height: 100px;
margin-bottom: 25px;
background: purple;
position: relative;
}
.grid {
display: grid;
grid-template: 10px / 10px;
width: 50px;
height: 50px;
background: lightblue;
}
.item {
width: 75%;
height: 75%;
background: orange;
position: absolute;
}
</style>
<p>The test PASS if you see an orange box inside a purple box on top and a small orange box inside a light blue box inside a purple box on bottom.</p>
<div class="wrapper">
<div id="grid-as-cb" class="grid" style="position: relative;">
<div class="item"></div>
</div>
</div>
<div class="wrapper">
<div id="grid-as-parent" class="grid">
<div class="item"></div>
</div>
</div>
<script>
window.requestAnimationFrame(() => {
document.getElementById("grid-as-cb").style.position = "initial";
document.getElementById("grid-as-parent").style.position = "relative";
document.body.offsetLeft;
document.documentElement.classList.remove('reftest-wait');
});
</script>
</html>
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