Yarn is a new package manager that has its own workflow for the npm client and other package managers while still being compatible with the npm registry. Yarn allows engineers to be more efficient when using shared code by enabling them to focus on building new products and features. Facebook’s engineers can install packages more quickly and manage dependencies in secure offline environments. Yarn’s performance was tested on every major JS framework and for additional non-Facebook uses.
Some of the benefits that Yarn provides are:
Yarn is now available on Github.