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 );

Answer 1

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