perfect-scrollbar/src/js/plugin/initialize.js

Minimalistic but perfect custom scrollbar plugin

/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var cls = require('../lib/class')
  , h = require('../lib/helper')
  , instances = require('./instances')
  , updateGeometry = require('./update-geometry');

// Handlers
var clickRailHandler = require('./handler/click-rail')
  , dragScrollbarHandler = require('./handler/drag-scrollbar')
  , keyboardHandler = require('./handler/keyboard')
  , mouseWheelHandler = require('./handler/mouse-wheel')
  , nativeScrollHandler = require('./handler/native-scroll')
  , selectionHandler = require('./handler/selection')
  , touchHandler = require('./handler/touch');

module.exports = function (element, userSettings) {
  userSettings = typeof userSettings === 'object' ? userSettings : {};

  cls.add(element, 'ps-container');

  // Create a plugin instance.
  var i = instances.add(element);

  i.settings = h.extend(i.settings, userSettings);

  clickRailHandler(element);
  dragScrollbarHandler(element);
  mouseWheelHandler(element);
  nativeScrollHandler(element);
  selectionHandler(element);

  if (h.env.supportsTouch || h.env.supportsIePointer) {
    touchHandler(element, h.env.supportsTouch, h.env.supportsIePointer);
  }
  if (i.settings.useKeyboard) {
    keyboardHandler(element);
  }

  updateGeometry(element);
};