Improving published files

[votemike]

At the moment prop-types is published with build, src and test directories along with a load of other files in the base directory. I don't believe these are needed and just slow down npm/yarn fetching the package.

[ljharb]

This is very intentional, and they are needed. npm install foo && npm explore foo && npm install && npm test should always work.

Additionally, the “files” property is very dangerous; only .npmignore should be used to prevent publishing of files.