Allow generation of CSS sourcemaps at development time #7114
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This MR provides an opt-in for creating CSS sourcemaps in dev mode. The related issue is #5707.
When the environment variable
DEV_CSS_SOURCEMAPS
is set totrue
, the sourcemaps are generated in development mode as well. Production mode is not affected.Tested by running 'yarn start' with and without environment variables.
This is the default:
![Screenshot 2019-05-26 22 43 01](https://user-images.githubusercontent.com/288516/58387116-3d6b9600-800a-11e9-8ed7-6a12339ab5d9.png)
This is with DEV_CSS_SOURCEMAPS=true:
![Screenshot 2019-05-26 22 42 26](https://user-images.githubusercontent.com/288516/58387121-56744700-800a-11e9-8988-e4caf507fd82.png)