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clarifying the use of custom environment variables (#1513)

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* clarifying the use of custom environment variables

* Tweak
This commit is contained in:
Calvin Webster
2017-02-09 15:46:47 -05:00
committed by Dan Abramov
parent de6e0590b2
commit 160d8d13ef
1 changed files with 11 additions and 7 deletions
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packages/react-scripts/template/README.md
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@@ -515,7 +515,11 @@ To learn more about Flow, check out [its documentation](https://flowtype.org/).
Your project can consume variables declared in your environment as if they were declared locally in your JS files. By
default you will have `NODE_ENV` defined for you, and any other environment variables starting with
`REACT_APP_`. These environment variables will be defined for you on `process.env`. For example, having an environment
`REACT_APP_`.
>Note: You must create custom environment variables beginning with `REACT_APP_`. Any other variables except `NODE_ENV` will be ignored to avoid accidentally [exposing a private key on the machine that could have the same name](https://github.com/facebookincubator/create-react-app/issues/865#issuecomment-252199527).
These environment variables will be defined for you on `process.env`. For example, having an environment
variable named `REACT_APP_SECRET_CODE` will be exposed in your JS as `process.env.REACT_APP_SECRET_CODE`, in addition
to `process.env.NODE_ENV`.