<!DOCTYPE html>
<html>
    <title>-webkit-xxx-large is an alias of xxx-large</title>
    <p>Computed style is: <span id="computed"></span></p>
    <p>Specified style is: <span id="specified"></span></p>
    <span id="rendered" style="font-size: -webkit-xxx-large">Rendering result</span>
    <script>
        computed.textContent = getComputedStyle(rendered).fontSize;
        specified.textContent = rendered.style.fontSize;
    </script>
</html>
