jQuery $.on.apply not working

Question

Any one know why

$.on.apply(this, args);

gives me "Uncaught TypeError: Cannot read property 'apply' of undefined"

I know for sure that $.on is defined in jQuery :/

Maltha

what are you trying to achieve?? – Stricklin

I'm trying to bind events on a custom object – Maltha

apply of undefined shows $ is undefined. – Suffer

Giyf: #3797288 – Accompaniment

Answer 1

The on() method is bound to $.fn $

$.fn.on.apply(this, args);

Naman

now I get Uncaught TypeError: undefined is not a function – Maltha

what is the jQuery version – Naman

it's the latest. it works if I use it with html element – Maltha

Answer 2

I think your syntax is incorrect. use syntax like

$('el').on("click", function() {
       alert( $( this ).text() );
       });

Geostrophic

instead of $(this).text, you could just write this.textContent, though. It saves you a number of function calls – Silvester

Answer 3

You know for sure $.on is defined, well... I beg to differ:

console.log($.on);//undefined
console.log($.fn.on);//function (a,c,d,e,f)
console.log($().on);//function...

Not sure though, that what you're trying to do is a valid use-case for jQuery's on, besides, applying the on function to a custom object doesn't give that object magical properties... I mean: it's not like that object will all of a sudden become clickable, if it's just an object literal

Silvester

I know, I'm just trying to make use of jQuery's event system in my own app. ppl say that you can use events on custom objects: forum.jquery.com/topic/… – Maltha

found the info here: #1553842. It seems to work if I call on() normally, but if I use apply I get that weird error :/ – Maltha

@Elfy: jQuery doesn't actually have its own event system, it merely hatches on to JS's event loop, and provides a consistent API for it. You can register "fake" events, though, and manually invoke the handler: jQObject.trigger('myevent');, but that still means you have to manually trigger the event, and rather defeats the point, imo – Silvester