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+<!DOCTYPE html>
+<html lang=en class="reftest-wait">
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Grid positioned item dynamic change.</title>
+<link rel="help" href="https://drafts.csswg.org/css-grid-2/#abspos">
+<link rel="match" href="grid-positioned-item-dynamic-change-005-ref.html">
+<meta name="assert" content="This test checks that positioned items can be dynamically changed.">
+<style>
+  #grid {
+    display: inline-grid;
+    grid-template-columns: 50px 50px;
+    grid-template-rows: 50px 50px;
+    background-color: blue;
+    position: relative;
+  }
+  #child {
+    grid-area: 2 / 2 / 2 / 2;
+    width: 100%;
+    height: 100%;
+    background-color: green;
+    position: absolute;
+  }
+  #grandchild {
+    width: 50%;
+    height: 50%;
+    background-color: red;
+  }
+</style>
+
+  <body onload=updateConstraints()>
+
+  <p>Test passes if it matches the reference.</p>
+
+  <div id="grid">
+    <div id="child">
+      <marquee id="grandchild"></marquee>
+    </div>
+  </div>
+
+</body>
+
+<script>
+  function updateConstraints() {
+    document.body.offsetTop;
+
+    document.getElementById('child').style.bottom = '0';
+    document.getElementById('child').style.left = '0';
+    document.getElementById('child').style.contain = 'strict';
+
+    document.documentElement.classList.remove('reftest-wait');
+  }
+</script>
+
+</html>
+\ No newline at end of file