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<html><body><p>Click the button to find out if the dialog window is open.</p><button onclick="myFunction()">Try it</button><p><b>Note:</b> The dialog element is only supported in Chrome 37+, Safari 6+ and Opera 24+.</p><p id="demo"></p><dialog id="myDialog" open>This is an open dialog window</dialog><script>function myFunction() { var x = document.getElementById("myDialog").open; document.getElementById("demo").innerHTML = x;}</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_dialog_open2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 05 Sep 2022 15:53:01 GMT --></html>