Protect Loader against the closure circular reference bug

src/loaders/Loader.js

@@ -32,7 +32,40 @@ function Loader() {
 
 }
 
-Loader.prototype = {
+Loader.Handlers = {
+
+	handlers: [],
+
+	add: function ( regex, loader ) {
+
+		this.handlers.push( regex, loader );
+
+	},
+
+	get: function ( file ) {
+
+		var handlers = this.handlers;
+
+		for ( var i = 0, l = handlers.length; i < l; i += 2 ) {
+
+			var regex = handlers[ i ];
+			var loader = handlers[ i + 1 ];
+
+			if ( regex.test( file ) ) {
+
+				return loader;
+
+			}
+
+		}
+
+		return null;
+
+	}
+
+};
+
+Object.assign( Loader.prototype, {
 
 	constructor: Loader,
 
@@ -320,40 +353,7 @@ Loader.prototype = {
 
 	} )()
 
-};
-
-Loader.Handlers = {
-
-	handlers: [],
-
-	add: function ( regex, loader ) {
-
-		this.handlers.push( regex, loader );
-
-	},
-
-	get: function ( file ) {
-
-		var handlers = this.handlers;
-
-		for ( var i = 0, l = handlers.length; i < l; i += 2 ) {
-
-			var regex = handlers[ i ];
-			var loader = handlers[ i + 1 ];
-
-			if ( regex.test( file ) ) {
-
-				return loader;
-
-			}
-
-		}
-
-		return null;
-
-	}
-
-};
+} );
 
 
 export { Loader };