FIX SSR (#2)

* fixssr Move 'removeListener' and 'addlistener' from util.js to Lightbox.js; add checks for 'window'

Author: KevinGruber

src/LightBox.js

@@ -3,7 +3,7 @@ import React, {Component} from 'react'
 import PaymentPageFrame from './PaymentPageFrame'
 import {
   filterProps, toUrlParams, parseUrl,
-  removeListener, addListener, lockScrolling,
+  lockScrolling,
   releaseLock
 } from './utils'
 
@@ -49,12 +49,14 @@ export default class LightBox extends Component {
     this.props.onCancelled()
   }
 
-  componentDidMount() {
-    addListener('message', this.onMessage)
+  componentDidMount() {    
+    const addListener = window.addEventListener || window.attachEvent
+    addListener('message', this.onMessage)   
   }
 
-  componentWillUnmount() {
-    removeListener('message', this.onMessage)
+  componentWillUnmount() {    
+    const removeListener = window.removeEventListener || window.detachEvent
+    removeListener('message', this.onMessage)    
     releaseLock()
   }
 
@@ -95,4 +97,4 @@ LightBox.defaultProps = {
   theme: 'DT2015',
   version: '1.0.2',
   showsPaymentPage: true,
-}
+}

src/utils.js

@@ -25,9 +25,6 @@ export const parseUrl = url => {
   return a
 }
 
-export const removeListener = window.removeEventListener || window.detachEvent
-export const addListener = window.addEventListener || window.attachEvent
-
 export const lockScrolling = () => {
   var element = document.createElement('style')
   element.innerHTML = styles.scrollLock