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<!DOCTYPE html> <html> <body> <p>Click the button to open an output stream, add some text, and close the output stream.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { document.open("text/html", "replace"); document.write("<html><body><p>Hello World!</p></body></html>"); document.close(); } </script> </body> </html>