what's the difference of return true or false here?

Question

$('form').submit(function() {
  alert($(this).serialize());
  return false;  // return true;
});

what's the difference for this form submission function between return false and true?

Answer 1

If you return false from the submit event, the normal page form POST will not occur.

Answer 2

return false, don't do the form's default action. return true, do the form's default action.

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It's also better to do

$('form').submit(function(e) {
  alert($(this).serialize());
  e.preventDefault();
});