Difference between npm run start and node server.js

Question

What is the difference between running the application using

1)

node server.js

and making a script

"start" : "node server.js"

using

npm run start.

When i type

1)

node server.js | pino-pretty

in terminal there is an error

pino-pretty not found

When i make

"start": "node server.js | pino-pretty"

in package.json and type

npm run start

in terminal it works.

So apparently there is a fundamental difference between running the application in 1 and 2.

Per npm run docs: In addition to the shell's pre-existing PATH, npm run adds node_modules/.bin to the PATH provided to scripts. That's where you'll presumably find pino-pretty. — jarmod
– jarmod, Commented Mar 5, 2022 at 23:53
yeah @jarmod. node server.js | node_modules/.bin/pino-pretty also worked. thank you — yılmaz
– yılmaz, Commented Mar 5, 2022 at 23:57

jarmod · Accepted Answer · 2022-03-05 23:59:08Z

2

The difference is PATH.

Per the npm run docs:

In addition to the shell's pre-existing PATH, npm run adds node_modules/.bin to the PATH provided to scripts.

You'll find pino-pretty in node_modules/.bin.

answered Mar 5, 2022 at 23:59

jarmod

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