🟩 Node.js errors

Node.js runtime errors: module resolution, ports in use, file system and network errno codes.

Code	Error	What it means
MODULE_NOT_FOUND	Error: Cannot find module 'x' (MODULE_NOT_FOUND)	Node can’t resolve the module path — the package isn’t installed, or a relative path/extension is wrong.
ECONNREFUSED	Error: connect ECONNREFUSED 127.0.0.1:5432	Nothing is listening at that host:port — the target service is down or you’re connecting to the wrong address.
ENOENT	Error: ENOENT: no such file or directory	A file or directory the program tried to open doesn’t exist at that path.
EADDRINUSE	Error: listen EADDRINUSE: address already in use :::3000	Another process is already listening on that port.