ExpressJS Debugging - ExpressJS

How is debugging done in ExpressJS?

The Debug module is used to internally log information about route matching, middleware functions, application mode, etc.
To see all internal logs used in express, set the DEBUG environment variable to express:* when starting the app:
These logs are very helpful when a component of your app is not functioning right. This verbose output might be a little overwhelming. You can also restrict the DEBUG variable to specific area to be logged. For example, if you wish to restrict the logger to application and router, you can use:
Debug is turned off by default and is automatically turned off in production environment.

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