Merge pull request #64 from aga5tya/fix-server-window-error

fix(ssr): change the way window object was defensively checked.

Author: developerdizzle

lib/VirtualList.js

@@ -70,7 +70,7 @@ var VirtualList = function VirtualList(options) {
         _this.refreshState = _this.refreshState.bind(_this);
 
         // if requestAnimationFrame is available, use it to throttle refreshState
-        if (window && 'requestAnimationFrame' in window) {
+        if (typeof window !== 'undefined' && 'requestAnimationFrame' in window) {
           _this.refreshState = (0, _throttleWithRAF2.default)(_this.refreshState);
         }
         return _this;

src/VirtualList.js

@@ -42,7 +42,7 @@ const VirtualList = (options, mapVirtualToProps = defaultMapToVirtualProps) => (
       this.refreshState = this.refreshState.bind(this);
 
       // if requestAnimationFrame is available, use it to throttle refreshState
-      if (window && 'requestAnimationFrame' in window) {
+      if (typeof window !== 'undefined' && 'requestAnimationFrame' in window) {
         this.refreshState = throttleWithRAF(this.refreshState);
       }
     };