npm and error messages

node_modules/enhanced-resolve/lib/ModuleKindPlugin.js

@@ -0,0 +1,26 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+var createInnerCallback = require("./createInnerCallback");
+
+function ModuleKindPlugin(source, target) {
+	this.source = source;
+	this.target = target;
+}
+module.exports = ModuleKindPlugin;
+
+ModuleKindPlugin.prototype.apply = function(resolver) {
+	var target = this.target;
+	resolver.plugin(this.source, function(request, callback) {
+		if(!request.module) return callback();
+		var obj = Object.assign({}, request);
+		delete obj.module;
+		resolver.doResolve(target, obj, "resolve as module", createInnerCallback(function(err, result) {
+			if(arguments.length > 0) return callback(err, result);
+
+			// Don't allow other alternatives
+			callback(null, null);
+		}, callback));
+	});
+};