scrollspy.js

'use strict';

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0): scrollspy.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */

var ScrollSpy = (function ($) {

  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  var NAME = 'scrollspy';
  var VERSION = '4.0.0';
  var DATA_KEY = 'bs.scrollspy';
  var JQUERY_NO_CONFLICT = $.fn[NAME];

  var Default = {
    offset: 10
  };

  var Event = {
    ACTIVATE: 'activate.bs.scrollspy',
    SCROLL: 'scroll.bs.scrollspy',
    LOAD: 'load.bs.scrollspy.data-api'
  };

  var ClassName = {
    DROPDOWN_MENU: 'dropdown-menu',
    ACTIVE: 'active'
  };

  var Selector = {
    DATA_SPY: '[data-spy="scroll"]',
    ACTIVE: '.active',
    LI_DROPDOWN: 'li.dropdown',
    LI: 'li'
  };

  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  var ScrollSpy = (function () {
    function ScrollSpy(element, config) {
      _classCallCheck(this, ScrollSpy);

      this._scrollElement = element.tagName === 'BODY' ? window : element;
      this._config = $.extend({}, Default, config);
      this._selector = '' + (this._config.target || '') + ' .nav li > a';
      this._offsets = [];
      this._targets = [];
      this._activeTarget = null;
      this._scrollHeight = 0;

      $(this._scrollElement).on(Event.SCROLL, $.proxy(this._process, this));

      this.refresh();
      this._process();