mongoose connection nodejs

1const mongoose = require('mongoose');
2
3const connectDB = async () => {
4    mongoose
5        .connect('mongodb://localhost:27017/playground', {
6            useCreateIndex: true,
7            useNewUrlParser: true,
8            useUnifiedTopology: true,
9            useFindAndModify: false
10        })
11        .then(() => console.log('Connected Successfully'))
12        .catch((err) => console.error('Not Connected'));
13}
14
15module.exports = connectDB;

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

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