Execute javascript code straight before page submit

Question

There are a few similar questions to this but none quite the same.

I want to know if there is an event that can be used to execute some JS before a page is submittin

Answer 1

The following code will abort the submission from the window level, which will not submit the form.

window.onsubmit = function() { alert('aborting submit'); return false; };

Tested with IE11, so it should work for some legacy applications without jQuery.