jQuery on(); function

Question

I'm learning Backbone and had some issues with the on()-function. But actually it's a very basic JavaScript question.

Why is it that the first line of code below works, and the second doesn't? Using the second line, the render-function is never triggered. Mind the brackets.

Works

this.collection.on( 'reset', this.render, this );

Fails

this.collection.on( 'reset', this.render(), this );

possible duplicate of [What's the meaning of "()" in a function call?](http://stackoverflow.com/questions/3641330/whats-the-meaning-of-in-a-function-call) — pimvdb, Jun 30 '12 at 14:01

score 9 · Accepted Answer · answered Jun 30 '12 at 14:00

9

this.render() executes function (so in your case you are passing data returned from this function), whereas this.render is handler to function.

answered Jun 30 '12 at 14:00

Zbigniew

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so using this.render() it is only executed once, when I bind the function? – ndequeker Jun 30 '12 at 14:02
2

Yes, you are passing data returned by the `render()` function. – Zbigniew Jun 30 '12 at 14:02

jQuery on(); function

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