For example with a Github repo you can do npm install or yarn add a (for Github repos there is the shorthand /). You can push your updates to a remote, and add that version as a dependency. (No time to be reading things? Scroll to the end for the tldr.) What is the best way to add the local copy of the package to a local project for real work testing? You are working on local changes and you need to test them out before you commit, let alone before you open a pull request or deploy an update. You might be writing a package for general distribution or maybe you are contributing to an open source package, or a private personal package, or something internal to your team. There are times when you want to install a local package as a project dependency.
