yarn

 yarn help

--------------

... Accessing the list of commands

yarn help

---------------

... Starting a new project

yarn init

-------------------

... Installing all the dependencies

yarn

yarn install

-------------

... Adding a dependency

yarn add [package]

yarn add [package]@[version]

yarn add [package]@[tag]

------------------

... Adding a dependency to different categories of dependencies

yarn add [package] --dev  # dev dependencies

yarn add [package] --peer # peer dependencies

----------------------

... Upgrading a dependency

yarn up [package]

yarn up [package]@[version]

yarn up [package]@[tag]

---------------

... Removing a dependency

yarn remove [package]

----------------------

... Upgrading Yarn itself

yarn set version latest

yarn set version from sources