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Tweak section on expanding env variables

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Dan Abramov
2018-01-15 00:36:53 +00:00
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parent 12d05447b9
commit 95b26012a4
1 changed files with 5 additions and 2 deletions
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7
packages/react-scripts/template/README.md
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@@ -980,17 +980,20 @@ these defined as well. Consult their documentation how to do this. For example,
#### Expanding Environment Variables In `.env`
>Note: this feature is available with `react-scripts@1.0.18` and higher.
>Note: this feature is available with `react-scripts@1.1.0` and higher.
Expand variables already on your machine for use in your .env file (using [dotenv-expand](https://github.com/motdotla/dotenv-expand)). See [#2223](https://github.com/facebookincubator/create-react-app/issues/2223).
Expand variables already on your machine for use in your `.env` file (using [dotenv-expand](https://github.com/motdotla/dotenv-expand)).
For example, to get the environment variable `npm_package_version`:
```
REACT_APP_VERSION=$npm_package_version
# also works:
# REACT_APP_VERSION=${npm_package_version}
```
Or expand variables local to the current `.env` file:
```
DOMAIN=www.example.com
REACT_APP_FOO=$DOMAIN/foo