Copy Whole Page HTML Copy Page HTML Hello, World! Visit Example.com Live Code Preview HTML / CSS / JS Editor <!DOCTYPE html> <html xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml" lang="en-US" > <head> <style> body { font-family: sans-serif; text-align: center; margin-top: 50px; } h1 { color: #007bff; } </style> </head> <body> <h1 id="title">Hello, Live Preview!</h1> <button id="btn">Click Me</button> <script> document.getElementById('btn').addEventListener('click', function() { document.getElementById('title').textContent = 'You clicked me!'; }); </script> </body> </html> Live Preview Visit Example.com