Input
Output
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>DOM Manipulation</title> </head> <body> <h1 id="title">Hello, World!</h1> <button onclick="changeTitle()">Change Title</button> <script> function changeTitle() { document.getElementById("title").innerHTML = "New Title!"; } </script> </body> </html>