Backbone.js model not defined in view?

Question

I've decided that I am going to try and learn backbone.js by making a web app. This is the first time I have done anything extensive in javascript, so the answer to my problem may be right in front of my face.

I have the web app on github, along with a running version that doesn't work. The javascript console just says that something is undefined when I don't think it should be. Here's the error that chrome gives for line 30 of app.js:

Uncaught TypeError: Cannot read property 'el' of undefined

I've sort of been referencing the backbone-fundamentals example modular to-do app, and it doesn't seem to have any issues with a similar thing.

If anyone could point out what I am doing wrong, I would be most appreciative!

Thanks in advance!

Tom Tu · Accepted Answer · 2012-02-18 14:38:15Z

7

Your Machine view render method was missing return this and by default all methods return undefined - that's why chaining didn't work

Edit: and a small tip:

jQuery, Underscore and Backbone register globally - and thanks to that you don't have to define them as dependencies every time - it's enough if you require them in your main script once and after that you can access them from the global scope as you normally would

answered Feb 18, 2012 at 14:38

Tom Tu

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Pratik Khadloya · Accepted Answer · 2013-02-25 01:19:50Z

0

In my case i was returning this without the return keyword. As i was using javascript and not coffeescript it failed on me. So, if you are using javascript use return this; instead of just this in the last line of the render() function.

I also had a problem when using this.collection.on('reset', this.render(), this). I instead had to use this.collection.on('reset', this.render.bind(this));

edited Feb 25, 2013 at 1:19

answered Feb 25, 2013 at 1:01

Pratik Khadloya

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