Fixed bug #24

Author: jeffreylanters

library/modules/UnityEvent.js

@@ -22,7 +22,7 @@ var UnityEvent = exports.UnityEvent = function () {
     _createClass(UnityEvent, [{
         key: 'emit',
         value: function emit(parameter) {
-            if (this.canEmit() === true) _Unity.UnityInstance.SendMessage(this.gameObjectName, this.methodName, parameter || '');else console.warn('Wait for Unity to be instantiated before sending an event \'' + this.methodName + '\'');
+            if (this.canEmit() === true) _Unity.UnityInstance.SendMessage(this.gameObjectName, this.methodName, typeof parameter !== 'undefined' ? parameter : '');else console.warn('Wait for Unity to be instantiated before sending an event \'' + this.methodName + '\'');
         }
     }, {
         key: 'canEmit',

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-unity-webgl",
-  "version": "6.4.1",
+  "version": "6.4.2",
   "description": "A Unity WebGL component for your React application",
   "main": "library/index.js",
   "types": "./types.d.ts",
@@ -34,4 +34,4 @@
     "babel-preset-env": "1.6.1",
     "babel-preset-react": "6.24.1"
   }
-}
+}

source/modules/UnityEvent.js

@@ -10,7 +10,7 @@ export class UnityEvent {
             UnityInstance.SendMessage(
                 this.gameObjectName,
                 this.methodName,
-                parameter || '')
+                typeof parameter !== 'undefined' ? parameter : '')
         else
             console.warn(`Wait for Unity to be instantiated before sending an event '${this.methodName}'`)
     }