node.js - Setting loglevel in environment variable in node -

node.js - Setting loglevel in environment variable in node -

i saw few weeks function/module in nodejs set environment variable decide loglevel , filtering, , utilize function in programme print out info if loglevel matched.

i going insane, cannot find was. remember existing module,that -- perchance -- came express.

i have been looking 2 hours. happen know was?

it debug module, has functionality. doesn't come express though. there logger middleware came express (3) has since been extracted own module , called morgan.

node.js logging