connect with mongoose using async/await

mongoose-connection.js

const mongoose = require('mongoose')

mongoose.Promise = Promise

mongoose.connection.on('connected', () => {
  console.log('Connection Established')
})

mongoose.connection.on('reconnected', () => {
  console.log('Connection Reestablished')
})

mongoose.connection.on('disconnected', () => {
  console.log('Connection Disconnected')
})

mongoose.connection.on('close', () => {
  console.log('Connection Closed')
})

mongoose.connection.on('error', (error) => {
  console.log('ERROR: ' + error)
})

const run = async () => {
  await mongoose.connect('mongodb://localhost:27017/emilioriosvz', {
    autoReconnect: true,
    reconnectTries: 1000000,
    reconnectInterval: 3000
  })
}

run().catch(error => console.error(error))

Just to shorten it up a bit:
`
mongoose.Promise = Promise
mongoose.connection.on(
'connected', () => {
console.log('Connection Established')
},
'reconnected', () => {
console.log('Connection Reestablished')
},
'disconnected', () => {
console.log('Connection Disconnected')
},
'close', () => {
console.log('Connection Closed')
},
'error', (error) => {
console.log('ERROR: ' + error)
}

)

`

const connectDB = async () => {
try {
const dbConnection = await mongoose.connect('mongodb://localhost:27017/react-ecommerce');

console.log(`MongoDB Connected: ${dbConnection.connection.host}`.cyan.underline);

} catch (error) {
console.error(Error: ${error.message}.red.underline.bold);
process.exit(1);
}
}

(async () => await mongoose.connect(DB_URL))().catch(console.log);