const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const app = express();
var dbState = [
  { value: 0, label: 'disconnected' },
  { value: 1, label: 'connected' },
  { value: 2, label: 'connecting' },
  { value: 3, label: 'disconnecting' },
];
mongoose.connect(
  'mongodb://localhost:27017/firstdatabase',
  { useNewUrlParser: true },
  () => {
    conststate = Number(mongoose.connection.readyState);
    console.log(dbState.find((f) => f.value == state).label, 'todb');
  }
);