Thread: Need Help choosing js library for event handling

Originally Posted by Philip M

None of these libraries is recommended. They add an unacceptable overhead to the code. You should prefer plain vanilla Javascript.

cool thanks

Originally Posted by deathshadow

Here...

Code:

function eventAdd(eventName, callback) {
	if (this.addEventListener) this.addEventListener(eventName, callback, false);
		else this.attachEvent('on' + eventName, callback);
}

function eventProcess(event, preventPropagation) {
	event = event || window.event;
	if (!event.target) event.target = event.srcElement;
	if (preventPropagation) {
		// this MAY be overkill... Oh, who are we kidding, it is!
		event.cancelBubble = true;
		if (event.stopPropagation) event.stopPropagation();
		if (event.preventDefault) event.preventDefault();
		event.returnValue = false;
	}
	return event;
}

DONE, and the only reason it's "that massive" is it provides support all the way back to IE5.

preventPropagate is an optional boolean (so it assumes false) that will stop the normal click behavior of the element from firing.

Example use, let's say you had an <a>nchor element called "#latest" you wanted to attach a onclick handler that adds a wrapping call for tracking to the link...

Code:

eventAdd(document.getElementById('latest'), function(e) {
	e = eventProcess(e, true); // true prevents anchor from following it's href
	window.location.href = 'wrapper.php?site=' + encodeURIComponent(e.target.href);
});

You need much more than that, you're probably doing something wrong... and about two thirds of that code could go in the trash if you don't need to support IE8/earlier. (like in a web app where you know the runtime engine is going to be something like webkit or blink). In fact in those cases, just use attachEvent and e directly without the above functions...

Which is why SO many "frameworks" are pointless when making web apps, but do provide missing functionality in legacy browsers; still I'd rather use simply polyfills when I need them than get in the habit of relying on fat bloated steaming piles of halfwit manure like jquery.

thanks Dr. DeathShadow