I'm a big fan of Yarn precisely because it supports an "offline mirror" feature right now. In addition to caching downloaded packages globally, it can be confi

I'm a big fan of Yarn precisely because it supports an "offline mirror" feature right now. In addition to caching downloaded packages globally, it can be configured to cache them in a local folder that can be committed directly to version control. That way, the local packages will be used when someone else clones the repo and installs things. I gave an example of using Yarn's offline mirror option in one of my "Practical Redux" tutorial blog posts: http://blog.isquaredsoftware.com/2017/07/practical-redux-part-9-managing-dependencies/ http://blog.isquaredsoftware.com/2017/07/practical-redux-par... .