Merge pull request #30 from DavidWells/master

Fix for node server side react rendering. window undefined

Author: mzabriskie

lib/draggable.js

@@ -49,9 +49,17 @@ function matchesSelector(el, selector) {
 }
 
 // @credits: http://stackoverflow.com/questions/4817029/whats-the-best-way-to-detect-a-touch-screen-device-using-javascript/4819886#4819886
-var isTouchDevice = 'ontouchstart' in window // works on most browsers
+/* Conditional to fix node server side rendering of component */
+if (typeof window === 'undefined') {
+    // Do Node Stuff
+    var isTouchDevice = false;
+} else {
+    // Do Browser Stuff
+    var isTouchDevice = 'ontouchstart' in window // works on most browsers
     || 'onmsgesturechange' in window; // works on ie10 on ms surface
 
+}
+
 // look ::handleDragStart
 //function isMultiTouch(e) {
 //  return e.touches && Array.isArray(e.touches) && e.touches.length > 1
@@ -402,7 +410,7 @@ module.exports = React.createClass({
 			var directionY = clientY < parseInt(this.state.clientY, 10) ? -1 : 1;
 
 			clientX = Math.abs(clientX - parseInt(this.state.clientX, 10)) >= this.props.grid[0]
-					? (parseInt(this.state.clientX, 10) + (this.props.grid[0] * directionX)) 
+					? (parseInt(this.state.clientX, 10) + (this.props.grid[0] * directionX))
 					: this.state.clientX;
 
 			clientY = Math.abs(clientY - parseInt(this.state.clientY, 10)) >= this.props.grid[1]