readmore function coffee and rails

_readmore.html.slim

- NUMBER_CHAR_HIDDEN = 300
- if content.length < NUMBER_CHAR_HIDDEN
  p = content
- else
  p
    = content[0..NUMBER_CHAR_HIDDEN]
    a.read-more-show.hide href="#" = "Read More"
    span.read-more-content
      = content[NUMBER_CHAR_HIDDEN + 1..-1]
      a.read-more-hide.hide href="#" = "Read Less"

javascript:
  readMore()

readMore.js.coffee

@readMore = ->
  $('.read-more-content').addClass 'hide'
  $('.read-more-show, .read-more-hide').removeClass 'hide'
  $('.read-more-show').on 'click', (e) ->
    $(this).next('.read-more-content').removeClass 'hide'
    $(this).addClass 'hide'
    e.preventDefault()

  $('.read-more-hide').on 'click', (e) ->
    p = $(this).parent('.read-more-content')
    p.addClass 'hide'
    p.prev('.read-more-show').removeClass 'hide'
    e.preventDefault()

show.html.slim

= render 'readmore', content: content