MongoDB connection timeout error is usually by firewall set on server but there's a abnormal case as described below. Case 1: No Error const log = console.log; const {MongoClient} = require("mongodb"); var Client = new MongoClient("some-url"); (async function(){ await Client.connect(); log("Okay"); })(); Case 2: Time-out Error const log = console.log; const {MongoClient} = require("mongodb"); var Client = new MongoClient("some-url"); Client.conne...