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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Javascript HTML elements have multiple event listeners</title> </head> <body> <button id="myBtn">Click Me</button> <script> // Defining custom functions function firstFunction() { alert("The first function executed successfully!"); } function secondFunction() { alert("The second function executed successfully"); } // Selecting button element var btn = document.getElementById("myBtn"); // Assigning event listeners to the button btn.addEventListener("click", firstFunction); btn.addEventListener("click", secondFunction); </script> </body> </html>