Question

I guess I am missing something very basic here. I just want to get the value from the function in coffeescript. I am doing console.log for that value..

class App.Views.PlotModal extends Backbone.ModalView
  template: JST['plots/plot_modal'],

  render: ->
    console.log(@getSize.w);
    $(@el).html(@template(plot: @model));
    this.showModal();

  getSize: ->
    cell_div = document.getElementById("bgr");
    w : cell_div.offsetWidth * 3;
    h : cell_div.offsetHeight * 2;

When I go to console in firebug I keep getting undefined. If I log just @getSize, I get the function back. How do I return the variables w and h here?

Also is it a good idea to do this kind of operation (I want to dynamically resize iframe) in backbone view?

Answer 1

In CoffeeScript, this leaves the method f in the variable x as a simple function:

x = @f

If you want to call the function then you have to supply arguments:

x = @f 'pancakes'

or add parentheses:

x = @f()

So you want this:

console.log(@getSize().w)

As far as doing this sort of thing in Backbone goes, sure, why not? Backbone tends to leave policy up to you.