return false vs preventDefault

“Steal” it from a comment of this article.

If there is javacsript error in page, using return false browser will perform default action. That can be avoid using preventDefault(). Example:

$('a').click( function(e){
   $(this).css("background", "green");
   err();  // err is not defined, so javascript will throw error, and browser will ignore rest of the code (return false). Browser will perform default action.
   return false;
});

$('a').click( function(e){
   e.preventDefault();
   $(this).css("background", "green");
   err();  // err is not defined, so javascript will throw error, and browser will ignore rest of the code. We already called preventDefault() so browser will not perform default action.
});

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