chromium/third_party/blink/web_tests/fast/forms/datalist/datalist-fallback-content.html

<!DOCTYPE html>
<html>
<body>
    <label>Enter your browser</label>
    <input type="text" list="browsers">
    <datalist id="browsers">
        or select from this list
        <select>
            <option>Safari</option>
            <option>Chrome</option>
        </select>
    </datalist>
</body>
</html>