Demo with Browser Extension Tern plugin
See
https://github.com/angelozerr/tern-browser-extension
for more infos.
<!DOCTYPE html> <html> <body> <h1>JavaScript in Body</h1> <p id="demo">A Paragraph.</p> <button type="button" onclick="myFunction()">Try it</button> <script> function myFunction() { document.getElementById("demo").innerHTML = "Paragraph changed."; } myFunction(); </script> </body> </html>