AdminLTE/build/js/Dropdown.js

/**
 * --------------------------------------------
 * AdminLTE Dropdown.js
 * License MIT
 * --------------------------------------------
 */

const Dropdown = ($ => {
  /**
   * Constants
   * ====================================================
   */

  const NAME = 'Dropdown'
  const DATA_KEY = 'lte.dropdown'
  const JQUERY_NO_CONFLICT = $.fn[NAME]

  const Selector = {
    NAVBAR: '.navbar',
    DROPDOWN_MENU: '.dropdown-menu',
    DROPDOWN_MENU_ACTIVE: '.dropdown-menu.show',
    DROPDOWN_TOGGLE: '[data-toggle="dropdown"]'
  }

  const ClassName = {
    DROPDOWN_RIGHT: 'dropdown-menu-right'
  }

  const Default = {
  }

  /**
   * Class Definition
   * ====================================================
   */

  class Dropdown {
    constructor(element, config) {
      this._config = config
      this._element = element
    }

    // Public

    toggleSubmenu() {
      this._element.siblings().show().toggleClass('show')

      if (!this._element.next().hasClass('show')) {
        this._element.parents(Selector.DROPDOWN_MENU).first().find('.show').removeClass('show').hide()
      }

      this._element.parents('li.nav-item.dropdown.show').on('hidden.bs.dropdown', () => {
        $('.dropdown-submenu .show').removeClass('show').hide()
      })
    }

    fixPosition() {
      const elm = $(Selector.DROPDOWN_MENU_ACTIVE)

      if (elm.length !== 0) {
        if (elm.hasClass(ClassName.DROPDOWN_RIGHT)) {
          elm.css('left', 'inherit')
          elm.css('right', 0)
        } else {
          elm.css('left', 0)
          elm.css('right', 'inherit')
        }

        const offset = elm.offset()
        const width = elm.width()
        const windowWidth = $(window).width()
        const visiblePart = windowWidth - offset.left

        if (offset.left < 0) {
          elm.css('left', 'inherit')
          elm.css('right', (offset.left - 5))
        } else if (visiblePart < width) {
          elm.css('left', 'inherit')
          elm.css('right', 0)
        }
      }
    }

    // Static

    static _jQueryInterface(config) {
      return this.each(function () {
        let data = $(this).data(DATA_KEY)
        const _config = $.extend({}, Default, $(this).data())

        if (!data) {
          data = new Dropdown($(this), _config)
          $(this).data(DATA_KEY, data)
        }

        if (config === 'toggleSubmenu' || config === 'fixPosition') {
          data[config]()
        }
      })
    }
  }

  /**
   * Data API
   * ====================================================
   */

  $(Selector.DROPDOWN_MENU + ' ' + Selector.DROPDOWN_TOGGLE).on('click', function (event) {
    event.preventDefault()
    event.stopPropagation()

    Dropdown._jQueryInterface.call($(this), 'toggleSubmenu')
  })

  $(Selector.NAVBAR + ' ' + Selector.DROPDOWN_TOGGLE).on('click', event => {
    event.preventDefault()

    setTimeout(function () {
      Dropdown._jQueryInterface.call($(this), 'fixPosition')
    }, 1)
  })

  /**
   * jQuery API
   * ====================================================
   */

  $.fn[NAME] = Dropdown._jQueryInterface
  $.fn[NAME].Constructor = Dropdown
  $.fn[NAME].noConflict = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT
    return Dropdown._jQueryInterface
  }

  return Dropdown
})(jQuery)

export default Dropdown