CODEWITHSUNDEEP
node.jsreactjsnpmcommand-line-arguments
Eduardo Juarez
Eduardo Juarez

Reputation: 21

What is the --prod flag in "npm run build --prod" for?

I'm doing the fullstackopen course. There's a part where you create the production build files of a React application and copy them to the backend directory so that they can be served as static files. To optimize the task, they suggest adding this npm script to the backend directory:

"build:ui": "rm -rf build && cd ../../osa2/materiaali/notes-new && npm run build --prod && cp -r build ../../../osa3/notes-backend/",

If I understand correctly, this removes the build folder from the backend, then changes directory to the frontend where it creates a new production build and then copies the folder to the backend. But what is the --prod flag doing? I made a small test, running npm run buildand npm run build --prod and the output seems to be the same.

Upvotes: 2

Views: 7048

Answers (1)

o.aboamer
o.aboamer

Reputation: 93

Seems like that the --prod flag is ignored during builds. You need to call the build command as npm run build -- --prod. The extra “--“ makes sure the --prod flag is passed.

Upvotes: 3

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