is there a javascript (or jquery) short cut for "function(){return false;}"?

Question

It seems like I type "function(){return false;}" some what too frequently too prevent actions from happening... is there a short cut?

Answer 1

You can cancel an event default action by using the preventDefault method:

$("form").bind("submit", function(event){ 
  event.preventDefault(); 
});

Answer 2

Do you really think that's too much typing?

Why not have a global variable named f set to false, and use function() {return f;}

Answer 3

You could declare a named function like this:

function always_false() { return false; }

then use "always_false" wherever you would have created the anonymous function previously.

Answer 4

I often have a "no op" function defined at the top of my common js file:

function nop() { return false }

I use it whenever I need a "do nothing" or a "cancel event" handler (eg div.oncontextmenu = nop). In IE this has the added benefit that memory does not leak when creating similar [anonymous] functions on the fly and assigning them to event handlers. At least that's what IE Drip tells me.

Answer 5

Just set the event handler to null. This is cleaner than assigning to a "return false" function IMO because it removes the event handler altogether.

myButton.onclick = null;