dfn-for="DOMCommandTokenList">
        <h2>The <dfn>DOMCommandTokenList</dfn></h2>
        <pre class="idl">
           [Exposed=Window]
           interface DOMCommandTokenList : DOMTokenList {
             [SameObject] readonly attribute DOMString supported;
           };
        </pre>
        <p>The <dfn><code>supported</code></dfn> attribute returns the supported tokens as a string.</p>
    </section>
    <section id="element-contenteditable-mixin">
        <h2>Extensions to the <dfn>ElementContentEdit