How to set the default yarn version with yarn switch?

[akkadaya]

With corepack I could set the default yarn version.

corepack prepare --activate yarn@^4

how can I do the same with yarn switch?

[hamedrabah]

Yarn Switch doesn't currently have a persistent semver equivalent to Corepack's prepare --activate. It is project-first: it reads the nearest package.json and runs the exact version from packageManager.

For a project, set an exact version, for example:

{
  "packageManager": "yarn@<exact-4.x-version>"
}

Replace the placeholder with the Yarn 4 release you want. After that, ordinary yarn commands in that project will use that version. yarn switch up updates the current project's packageManager to the latest release on its configured line.

A command such as yarn switch ^4 --version selects Yarn 4 only for that invocation. Outside a project, Switch falls back to its built-in default/stable channel; there is currently no user-level semver setting corresponding to Corepack's global activation.