Saturday, April 5, 2008


What is it

This small plugin includes a clean and simplified version of jQuery.trigger, that will perform better and will specially scale better.

How is this achieved

Many useless steps are skipped when programatically triggering an event, this step that jQuery does no matter what, are not really necessary for triggered events, and some of them hit on perfomance badly. Most of them are not optimized for speed and scalability, but for reusability and code size.

Differences with trigger

This method supports array of data (can include an event object), namespaced events and exclusive triggering. The only known difference with jQuery.trigger is that this method doesn't trigger native handlers, so it's actually comparable to .triggerHandler().


This is method is at least 4 times faster than the regular trigger, and will scale much better as you call it more elements at once.

Global triggering

The equivalent for jQuery.event.trigger, is $.fastTrigger it accepts the same arguments as its prototype's counter-part, but triggers the event on all the elements in the page. This is a dangerous method to use, as it may hang the browser if the page has many elements, using $.fastTrigger won't solve the problem, but will surely perform better. This case should show off the previously mentioned (improved) scalability.

A few examples

$('ul li').fastTrigger('mouseover');//regular
$('h1').fastTrigger('');//with namespace
$('li p').fastTrigger('focus!');//exclusive
$('ul.list').fastTrigger('collapse');//custom event
$('#bar').fastTrigger('click', ['foo']);//data array
$.fastTrigger('keypress');//global triggering
$('a').fastTrigger('blur',[obj]]);//your event object




Unknown said...

Is this still true in 1.4.2?

Ariel Flesler said...

That's a good question, I haven't been comparing later.
I'll let you know if I do, do post here if you discover something.