JSONLoader: More robust metadata.type check. Fixes #7266.

src/loaders/JSONLoader.js

@@ -53,17 +53,23 @@ THREE.JSONLoader.prototype = {
 
 			if ( metadata !== undefined ) {
 
-				if ( metadata.type === 'object' ) {
+				var type = metadata.type;
 
-					console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.ObjectLoader instead.' );
-					return;
+				if ( type !== undefined ) {
 
-				}
+					if ( type.toLowerCase() === 'object' ) {
+
+						console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.ObjectLoader instead.' );
+						return;
+
+					}
+
+					if ( type.toLowerCase() === 'scene' ) {
 
-				if ( metadata.type === 'scene' ) {
+						console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.SceneLoader instead.' );
+						return;
 
-					console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.SceneLoader instead.' );
-					return;
+					}
 
 				}