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TypeScript + PnP quick start:

  • Initialize the repo using Yarn 2:
yarn init -2
yarn add --dev typescript
yarn dlx @yarnpkg/sdks vscode

Running a Yarn CLI command in the specified directory:

  • Starting a new library inside a monorepo directly, without manually creating directories for it.
yarn packages/my-new-lib init
  • Running an arbitrary command inside a specific workspace:
yarn packages/app tsc --noEmit

Hybrid PnP + node_modules mono-repo:

You may sometimes need to use node_modules on just part of your workspace (for example, if you use React-Native).

  • Create a separate directory for the node_modules project.
mkdir nm-packages/myproj
touch nm-packages/myproj/yarn.lock
  • Enable the node-modules linker :
yarn --cwd packages/myproj config set nodeLinker node-modules
  • Add a PnP ignore pattern for this path in your main .yarnrc.yml at the root of your monorepo:
- ./nm-packages/**
  • Run yarn install to apply pnpIgnorePatterns in the repo root.
  • Run cd nm-packages/myproj && yarn to install the now isolated project.