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<!DOCTYPE html> <html> <body> <div id="myDIV"> <p id="demo">This is a p element with id="demo" in a div.</p> </div> <p>Click the button to change the text of the p element in div.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { var x = document.getElementById("myDIV"); x.querySelector("#demo").innerHTML = "Hello World!"; } </script> </body> </html>
