npm and error messages

node_modules/extract-text-webpack-plugin/dist/lib/OrderUndefinedError.js

@@ -0,0 +1,16 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+function OrderUndefinedError(module) {
+  Error.call(this);
+  Error.captureStackTrace(this, OrderUndefinedError);
+  this.name = 'OrderUndefinedError';
+  this.message = 'Order in extracted chunk undefined';
+  this.module = module;
+}
+exports.default = OrderUndefinedError;
+
+
+OrderUndefinedError.prototype = Object.create(Error.prototype);