Error: Cannot Read Property Of Undefined

I'm trying to configure my app using Express like the following way, but I'm getting errors on doing that: server.js var express = require('express'); var env = process.env.NODE_EN

Solution 1:

Assuming you aren't setting process.env.NODE_ENV and it's using the default value, then your problem here is a simple spelling mistake

process.env.NODE_ENV || 'devleopment';

should be

process.env.NODE_ENV || 'development';

Your config file doesn't export an object devleopment hence why it returns undefined.