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<!DOCTYPE html> <html> <body> <h1>The Document Object</h1> <h2>The open() Method</h2> <p>Open a document deletes existing content.</p> <p>Open this document and write some text to it:</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { document.open(); document.write("<h1>Hello World</h1>"); document.close(); } </script> </body> </html>
