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<!DOCTYPE html> <html> <body> Address:<br> <textarea id="myTextarea"> 342 Alvin Road Ducksburg</textarea> <p>Click the button to change the default value of the text area.</p> <button type="button" onclick="myFunction()">Try it</button> <script> function myFunction() { document.getElementById("myTextarea").defaultValue = "Fifth Avenue, New York City"; } </script> </body> </html>