Testing library in 'dependencies'

[mattveraldi]

Hi, on my projects I moved testing-library from "dependencies" to "devDependencies" since I don't need an unit test library to be in the final bundle.
Is there any particular reason why it is placed in 'dependencies'?

[otaciliolacerda]

CRA uses Webpack to bundle the files. It starts in the index.js and only includes in the bundle the modules that are reachable from there. Since no test is reachable (at least it shouldn't) from you code, they won't be included in the bundle. In other words, this division for frontend projects that produce static bundles has no effect.

More details: create-react-app install devDepencies in dependencies section