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<!DOCTYPE html> <html> <body> <p>Click the button to display the value of the onclick attribute node of the button element.</p> <button id="myBtn" onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var elmnt = document.getElementById("myBtn"); var attr = elmnt.getAttributeNode("onclick").value; document.getElementById("demo").innerHTML = attr; } </script> </body> </html>