Singleton MongoDB Client

mongoClient.js

import { MongoClient } from 'mongodb';

const DbConnection = function () {

    var db = null;
    var instance = 0;

    async function DbConnect() {
        try {
            let url = 'mongodb://localhost:27017/articles';
            let _db = await MongoClient.connect(url);

            return _db
        } catch (e) {
            return e;
        }
    }

   async function Get() {
        try {
            if (db != null) {
                return db;
            } else {
                db = await DbConnect();
                return db; 
            }
        } catch (e) {
            return e;
        }
    }

    return {
        Get: Get
    }
}

export default DbConnection();