mongoose connection string

1mongodb://localhost:27017/mydbname

1mongoose.connect('mongodb://localhost:27017/test', {
2  useMongoClient: true,
3  connectTimeoutMS: 1000
4})

1try {
2  mongoose.connect(MONGODB_URI || 'mongodb://localhost/YOUR_DB_NAME', {
3      useNewUrlParser: true,
4      useUnifiedTopology: true
5    }, () =>
6    console.log("connected"));
7} catch (error) {
8  console.log("could not connect");
9}

1mongoose.connect('mongodb://localhost:27017/myapp');

1mongoose.connect('mongodb://username:password@host:port/database?options...', {useNewUrlParser: true});