MongoDB drivers exist for a whole range of programming languages, including Dart. We will use mongo_dart in our app, which is a server-side driver implemented purely in Dart. Simply add mongo_dart: any to your app's pubspec.yaml, and issue pub install. In the code, write:

import 'package:mongo_dart/mongo_dart.dart';

todo_mongodb is a version of todo_server_dartling_mysql, but now use MongoDB as a persistent data source (clone the project from https://github.com/dzenanr/todo_mongodb). It contains a client app todo_client_idb, identical to the one in the previous section, which stores data in IndexedDB. The server part todo_server_dartling_mongodb can be started by running bin/server.dart; you should see in the editor or the console:

Server at http://127.0.0.1:8080;

If you see the following exception, it means that the mongod server has not yet been started:

SocketException: Connection failed (OS Error: No connection could be made because...