Wrap our objects into IIFE

js/src/dom/data.js

@@ -5,6 +5,15 @@
  * --------------------------------------------------------------------------
  */
 
+const Data = (() => {
+
+  /**
+   * ------------------------------------------------------------------------
+   * Constants
+   * ------------------------------------------------------------------------
+   */
+
+
   const mapData = (() => {
     const storeData = {}
     let id = 1
@@ -45,7 +54,7 @@ const mapData = (() => {
     }
   })()
 
-const Data = {
+  return {
     setData(instance, key, data) {
       mapData.set(instance, key, data)
     },
@@ -56,5 +65,6 @@ const Data = {
       mapData.delete(instance, key)
     }
   }
+})()
 
 export default Data

js/src/dom/eventHandler.js

@@ -7,6 +7,14 @@ import Util from '../util'
  * --------------------------------------------------------------------------
  */
 
+const EventHandler = (() => {
+
+  /**
+   * ------------------------------------------------------------------------
+   * Polyfills
+   * ------------------------------------------------------------------------
+   */
+
   // defaultPrevented is broken in IE.
   // https://connect.microsoft.com/IE/feedback/details/790389/event-defaultprevented-returns-false-after-preventdefault-was-called
   const workingDefaultPrevented = (() => {
@@ -76,24 +84,26 @@ if (!window.Event || typeof window.Event !== 'function') {
     window.Event.prototype = origEvent.prototype
   }
 
+  /**
+   * ------------------------------------------------------------------------
+   * Constants
+   * ------------------------------------------------------------------------
+   */
+
+  const TransitionEndEvent = {
+    WebkitTransition : 'webkitTransitionEnd',
+    transition       : 'transitionend'
+  }
   const namespaceRegex = /[^.]*(?=\..*)\.|.*/
   const stripNameRegex = /\..*/
   const keyEventRegex  = /^key/
   const stripUidRegex  = /::\d+$/
-
-// Events storage
-const eventRegistry = {}
+  const eventRegistry  = {}   // Events storage
   let uidEvent         = 1
-
-function getUidEvent(element, uid) {
-  return element.uidEvent = uid && `${uid}::${uidEvent++}` || element.uidEvent || uidEvent++
+  const customEvents   = {
+    mouseenter: 'mouseover',
+    mouseleave: 'mouseout'
   }
-
-function getEvent(element) {
-  const uid = getUidEvent(element)
-  return eventRegistry[uid] = eventRegistry[uid] || {}
-}
-
   const nativeEvents   = [
     'click', 'dblclick', 'mouseup', 'mousedown', 'contextmenu',
     'mousewheel', 'DOMMouseScroll',
@@ -107,9 +117,20 @@ const nativeEvents = [
     'error', 'abort', 'scroll'
   ]
 
-const customEvents = {
-  mouseenter: 'mouseover',
-  mouseleave: 'mouseout'
+  /**
+   * ------------------------------------------------------------------------
+   * Private methods
+   * ------------------------------------------------------------------------
+   */
+
+
+  function getUidEvent(element, uid) {
+    return element.uidEvent = uid && `${uid}::${uidEvent++}` || element.uidEvent || uidEvent++
+  }
+
+  function getEvent(element) {
+    const uid = getUidEvent(element)
+    return eventRegistry[uid] = eventRegistry[uid] || {}
   }
 
   function fixEvent(event) {
@@ -163,7 +184,7 @@ function removeNamespacedHandlers(element, events, typeEvent, namespace) {
     }
   }
 
-const EventHandler = {
+  return {
     on(element, originalTypeEvent, handler, delegationFn) {
       if (typeof originalTypeEvent !== 'string' ||
           (typeof element === 'undefined' || element === null)) {
@@ -326,6 +347,7 @@ const EventHandler = {
       return evt
     }
   }
+})()
 
 // focusin and focusout polyfill
 if (typeof window.onfocusin === 'undefined') {

js/src/dom/selectorEngine.js

@@ -5,6 +5,15 @@
  * --------------------------------------------------------------------------
  */
 
+const SelectorEngine = (() => {
+
+
+  /**
+   * ------------------------------------------------------------------------
+   * Polyfills
+   * ------------------------------------------------------------------------
+   */
+
   // matches polyfill (see: https://mzl.la/2ikXneG)
   let fnMatches = null
   if (!Element.prototype.matches) {
@@ -41,7 +50,7 @@ if (!Element.prototype.closest) {
     }
   }
 
-const SelectorEngine = {
+  return {
     matches(element, selector) {
       return fnMatches.call(element, selector)
     },
@@ -76,5 +85,6 @@ const SelectorEngine = {
       return fnClosest(element, selector)
     }
   }
+})()
 
 export default SelectorEngine