<!DOCTYPE html> <html> <head> <title>HEAD</title> </head> <body id="test"> <button onclick="myFunction()">Try it</button> <a href="/">/</a> <a href="/home">/home</a> <p id="demo"></p> <script> function myFunction() { var x = document.head.innerHTML; window.alert(x); } </script> </body> </html>