Javascript override form onsubmit event not working

Question

I am overriding a form submit event like this:

form.onsubmit = function(event) {
  event.preventDefault();

But when I call submit on the fo

Answer 1

Following on @garryp's answer on "return false". To add on, further reading from MDN event.stopImmediatePropagation to see differences and use case between event.preventDefault and event.stopPropagation.

On the side note, "return false;" is the same calling both;

  event.preventDefault();
  event.stopPropagation();

Hope this helps.