+function ($) {
  'use strict';
  // TAB CLASS DEFINITION
  // ====================
  var Tab = function (element) {
    // jscs:disable requireDollarBeforejQueryAssignment
    this.element = $(element)
    // jscs:enable requireDollarBeforejQueryAssignment
  }
  Tab.VERSION = '1.0'
  Tab.TRANSITION_DURATION = 150
  Tab.prototype.show = function () {
    var $this    = this.element
    var $ul      = $this.closest('ul:not(.dropdown-menu)')
    var selector = $this.data('target')
    if (!selector) {
      selector = $this.attr('href')
      selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') // strip for ie7
    }
    if ($this.parent('li').hasClass('active')) return
    var $previous = $ul.find('.active:last a')
    var hideEvent = $.Event('hide.bs.tab', {
      relatedTarget: $this[0]
    })
    var showEvent = $.Event('show.bs.tab', {
      relatedTarget: $previous[0]
    })
    $previous.trigger(hideEvent)
    $this.trigger(showEvent)
    if (showEvent.isDefaultPrevented() || hideEvent.isDefaultPrevented()) return
    var $target = $(selector)
    this.activate($this.closest('li'), $ul)
    this.activate($target, $target.parent(), function () {
      $previous.trigger({
        type: 'hidden.bs.tab',
        relatedTarget: $this[0]
      })
      $this.trigger({
        type: 'shown.bs.tab',
        relatedTarget: $previous[0]
      })
    })
  }
  Tab.prototype.activate = function (element, container, callback) {
    var $active    = container.find('> .active')
    var transition = callback
      && $.support.transition
      && ($active.length && $active.hasClass('fade') || !!container.find('> .fade').length)
    function next() {
      $active
        .removeClass('active')
        .find('> .dropdown-menu > .active')
          .removeClass('active')
        .end()
        .find('[data-toggle="tab"]')
          .attr('aria-expanded', false)
      element
        .addClass('active')
        .find('[data-toggle="tab"]')
          .attr('aria-expanded', true)
      if (transition) {
        element[0].offsetWidth // reflow for transition
        element.addClass('in')
      } else {
        element.removeClass('fade')
      }
      if (element.parent('.dropdown-menu').length) {
        element
          .closest('li.dropdown')
            .addClass('active')
          .end()
          .find('[data-toggle="tab"]')
            .attr('aria-expanded', true)
      }
      callback && callback()
    }
    next()
    $active.removeClass('in')
  }
  // TAB PLUGIN DEFINITION
  // =====================
  function Plugin(option) {
    return this.each(function () {
      var $this = $(this)
      var data  = $this.data('bs.tab')
      if (!data) $this.data('bs.tab', (data = new Tab(this)))
      if (typeof option == 'string') data[option]()
    })
  }
  var old = $.fn.tab
  $.fn.tab             = Plugin
  $.fn.tab.Constructor = Tab
  // TAB NO CONFLICT
  // ===============
  $.fn.tab.noConflict = function () {
    $.fn.tab = old
    return this
  }
  // TAB DATA-API
  // ============
  var clickHandler = function (e) {
    e.preventDefault()
    Plugin.call($(this), 'show')
  }
  $(document)
    .on('click.bs.tab.data-api', '[data-toggle="tab"]', clickHandler)
    .on('click.bs.tab.data-api', '[data-toggle="pill"]', clickHandler)
}(jQuery);