Sticky footer with Coffee

sticky.coffee

$ ->
    check = ->
        $ '.wrapper, .footer-wrapper'
            .removeAttr 'style'

        doc = $(document).innerHeight()
        wrapper = $('.wrapper').innerHeight()

        if doc > wrapper
            $ '.wrapper'
                .css
                    'min-height': '100%'
            $ '.footer-wrapper'
                .css
                    'position': 'absolute'
                    'bottom': '0'
                    'left': '0'
                    'right': '0'

    check()

    $ window
        .resize ->
            check()

style.sass

.wrapper
	position: relative