How do you detect the environment in an express.js app?

Question

How do you detect what environment an expressJS app is running in? (development, test, production?). There\'s nothing in process.env indicating an environment..

Answer 1

You can either check the environment by checking the app.settings.env (this will work in Express), or you can do it in a more direct way by checking process.env.NODE_ENV (the environment is the one found in that variable or 'development' by default < this also works in other libraries such as Socket.IO etc).