Using javascipt

Question

Is any one know how to perform a fuction on clicking on browser anywhere and perform fuction according to that just like if we click right in a browser it will open another tab

Answer 1

Websites doesn’t have access to those.
Chrome extensions do and they are build with javascript.

Answer 2

event delegation.

https://code.sololearn.com/WACFJCm3jgd2/?ref=app