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<html><body><h1>The DOMToken Object</h1><h2>The supports() Method</h2><iframe id="myFrame"></iframe><p>The ifame supports "allow-forms":</p><p id="demo"></p><script>const list = document.getElementById("myFrame").sandbox;document.getElementById("demo").innerHTML = list.supports("allow-forms");</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_element_classlist_supports by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:39:46 GMT --></html>