You can try to run the following code to learn how to use JavaScript to replace the content of a document in JavaScript −
Example
<!DOCTYPE html> <html> <body> <p>Click and replace this content.</p> <button onclick = "Display()">Replace</button> <script> function Display() { document.open("text/html","replace"); document.write("<p>Demo text!</p>"); document.close(); } </script> </body> </html>