REACT env variables

Question

I am trying to setup a project for staging between dev to prod. I am trying to follow this article as it seems kind simple just to have a config file. https://serverless-stack.com/chapters/manage-environments-in-create-react-app.html

However early in the article he states you set the variable by doing this:

REACT_APP_TEST_VAR=123 npm start

When i start by app like that I get following: The term 'REACT_APP_STAGE=123' is not recognized as the name of a cmdlet, function. Any pointers?

I also tried:

Answer 1

you need to put the "REACT_APP_TEST_VAR=123" inside the script of npm start. For example when I run a npm build command it runs the following command (Where ENVIRONMENT is a env variable):

ENVIRONMENT=production webpack --mode production

So let's assume your cnpm start runs the regular "react-scripts start". You should define in your package json that the script "start" will do "REACT_APP_TEST_VAR=123 react-scripts start":

"start": "REACT_APP_TEST_VAR=123 react-scripts start",