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<!DOCTYPE html> <html> <body> <p>This example uses the addEventListener() method to attach an "input" event to an input element.</p> <p>Write something in the text field to trigger a function.</p> Enter name: <input type="text" id="myInput" value="Mickey"> <script> document.getElementById("myInput").addEventListener("input", myFunction); function myFunction() { alert("The value of the input field was changed."); } </script> </body> </html>