Start React App with Command Line Arguments

Question

I'd like to be able to launch my client-side React app from another programming language and pass it some command line arguments which would be passed to top level props or a context (or whatever).

I basically want to be able to launch a command like:

npm start inputFile="/path/to/input/file.ext"

And have the inputFile path be passed to my React app. Is this possible? I'm using create-react-app to bootstrap my app.

Victor C posted an Answer saying "Check documentation: https://create-react-app.dev/docs/adding-custom-environment-variables/ there u can find exemples" — Scratte
– Scratte, Commented Apr 19, 2021 at 10:03

Nikko Khresna · Accepted Answer · 2020-03-27 18:57:28Z

3

declare them before the command,
INPUT_FILE="/path/to/input/file.ext" ANOTHER_INPUT_FILE="/another/path/to/input/file.ext" npm start

accessible via process.env.INPUT_FILE
oh the convention is usually uppercase and separated by underscore between words.

or more convenient if you can just put them in .env file
https://create-react-app.dev/docs/adding-custom-environment-variables/#expanding-environment-variables-in-env

answered Mar 27, 2020 at 18:57

Nikko Khresna

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