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<!DOCTYPE html> <html> <body> <h1>JavaScript Functions</h1> <h2>setTimeout() with a Callback</h2> <p>Wait 3 seconds (3000 milliseconds) for this page to change.</p> <h1 id="demo"></h1> <script> setTimeout(myFunction, 3000); function myFunction() { document.getElementById("demo").innerHTML = "I love You !!"; } </script> </body> </html>
