how do i confirm i'm using yarn link correctly?

Question

How can I tell my local linked package is in use rather than from remote? Is it suppose to show up in the dev server of my local package?

Answer 1

If you are linking packageA into your project and wanting to confirm it is working, go to the base dir for the project and type:

ls -l node_modules/ | egrep "^l"

This will list any linked modules, each will show as:

lrwxr-xr-x 1 vagrant vagrant    66 Feb  3 14:39 packageA -> ../../../home/vagrant/.config/yarn/link/packageA

Also, if you are using VS Code, links are shown visually, if you scroll down your node_modules dir you will see:

Answer 2

If you check the yarn link documentation, the yarn link uses a local copy of the package.

This will create a symlink named react-relay/node_modules/react that links to your local copy of the react project.