Simple loading spinner for long requests with turbolinks and bootstrap modal. This fork: HTML for Bootstrap 3.3.x

loading_spinner.coffee

@PageSpinner =
  spin: (ms=500)->
    @spinner = setTimeout( (=> @add_spinner()), ms)
    $(document).on 'page:change', =>
      @remove_spinner()
  spinner_html: '
    <div class="modal hide fade" id="page-spinner" role="dialog">
      <div class="modal-dialog modal-sm" role="document">
        <div class="modal-content">
          <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            <h4 class="modal-title card-title">Please Wait...</h4>
          </div>
        <div class="modal-body card-body">
          <i class="icon-spinner icon-spin icon-2x"></i>
          &emsp;Loading...
        </div>
      </div>
    </div>
  '
  spinner: null
  add_spinner: ->
    $('body').append(@spinner_html)
    $('body div#page-spinner').modal()
  remove_spinner: ->
    clearTimeout(@spinner)
    $('div#page-spinner').modal('hide')
    $('div#page-spinner').on 'hidden', ->
      $(this).remove()

$(document).on 'page:fetch', ->
  PageSpinner.spin()