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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Positioned grid descendants</title>
+<link rel="help" href="https://drafts.csswg.org/css-grid/#abspos" title="9. Absolute Positioning">
+<link rel="match" href="positioned-grid-descendants-017-ref.html">
+<meta name="assert" content="Checks that absolutely positioned elements inside grid items are properly placed and sized.">
+<style>
+ #grid {
+ display: inline-grid;
+ grid-template-columns: 50px 50px;
+ grid-template-rows: 50px 50px;
+ background-color: blue;
+ position: relative;
+ }
+ #child {
+ grid-area: 1 / 1 / 1 / 1;
+ background-color: hotpink;
+ }
+ #abspos {
+ grid-area: 2 / 2 / 2 / 2;
+ bottom: 0;
+ left: 0;
+ width: 100%;
+ height: 100%;
+ background-color: green;
+ contain: strict;
+ position: absolute;
+ }
+ #grandchild {
+ width: 50%;
+ height: 50%;
+ background-color: red;
+ }
+</style>
+
+ <p>Test passes if it matches the reference.</p>
+
+ <div id="grid">
+ <div id="child">
+ <div id="abspos">
+ <marquee id="grandchild"></marquee>
+ </div>
+ </div>
+ </div>