CoffeeScript - Applying a class via loop?

Question

I've been experimenting a little bit and have run into a few occasions where it seems to make sense to apply a CS "class" via a loop.

For example:

if ($areas = $('.itemParent')).length >= 1
    class SomeClass
        constructor: (el) ->
            @$parent = el
            @$overflow = el.find('.overflow')
            @$items = @$overflow.find('.item')

            @max = @$items.length - 1
            @current = 0

        # Gets us to an area
        goToItem: (i) ->
            @$overflow.animate
                scrollLeft: @$items.eq(i).position().left
            , 450, 'easeInOutQuad'

        # Binds each item
        bindItems: ->
            @$parent.find('.item').bind 'click tap', (e) =>
                el = $(e.target).parents('.item')

                @$items.removeClass('active')
                el.addClass('active')

                @goToItem(el.index())
            @

    # Iterate and apply the structure to all areas
    $areas.each -> 
        area = new SomeClass($(@))
        area.bindItems()

It just seems more structured than binding them all "globally".. Is this a poor way to do this?

few occasions where it seems to make sense Please list these occasions. — asawyer
– asawyer, Commented Nov 21, 2012 at 20:34
Basically. Like if I have ".slideshow" on a website in multiple areas, and they all have different slides/pagers/navs (but are similarly structured). Applying the class would autoplay/bind/etc on each. Just seems like a DRY approach? — Brooklyn Nicholson
– Brooklyn Nicholson, Commented Nov 21, 2012 at 20:37
That's fine but why do you need to re-declare the class functions each time too? — asawyer
– asawyer, Commented Nov 21, 2012 at 20:39

Tony Rad · Accepted Answer · 2012-11-22 03:38:07Z

1

The idea behind Coffeescript classes is to define them globally or in modules.

Defining a class inside of another type of scope is kind of missing the point.

Coffeescript classes encourage a more ruby-esque view of classes as being separate from instances while retaining the power you get from being able to apply them as you see fit.

To put it simply, it's best to use Coffeescript classes at the top level or by exporting and requiring them from modules.

edited Nov 22, 2012 at 3:38

Tony Rad

2,50921 silver badges33 bronze badges

answered Nov 22, 2012 at 3:00

xero

261 bronze badge

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

CoffeeScript - Applying a class via loop?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related