x
<html><body><h1>The Document Object</h1><h2>The implementation Property</h2><p>Does this document has the feature Tesla X?</p><p id="demo"></p><script>let answer = document.implementation.hasFeature("TESLA", "X");document.getElementById("demo").innerHTML = answer;</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_document_implementation1 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 05 Sep 2022 15:18:53 GMT --></html>