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+<!DOCTYPE html>
+<html lang="en" class="reftest-wait">
+<meta charset="utf-8" />
+<title>CSS Pseudo-Elements Test: Dynamic change ::target-text background color</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-pseudo/#selectordef-target-text">
+<meta name="assert" content="This test checks that it's possible to modify dinamically the background color of a targeted text through ::target-text pseudo-element.">
+<link rel="match" href="target-text-dynamic-001-ref.html">
+<script src="/common/reftest-wait.js"></script>
+<style>
+  .magenta::target-text {
+    background-color: magenta;
+  }
+</style>
+
+<p>The test passes if the following word has a magenta background.</p>
+<div id="target">Example</div>
+
+<script>
+  location.href = "#:~:text=Example";
+  requestAnimationFrame(() => requestAnimationFrame(() => {
+    target.classList.add("magenta");
+    takeScreenshot();
+  }));
+</script>
+</html>