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Yarn
What it is
Yarn is a package manager and project manager for JavaScript projects, from individual work to industry monorepos. It resolves dependencies, maintains lockfiles, and supports workspaces that install and link packages within one project. Modern Yarn uses Plug'n'Play by default, creating a Node.js loader file rather than a typical node_modules directory; users can switch to node_modules or pnpm-style symlink installs. Yarn caches installed packages and shares them between projects on the same machine. Its offline mirror and zero-installs workflow can keep cached packages in a repository, reducing dependence on the npm registry. Plugins can add resolvers, fetchers, linkers, commands, and lifecycle hooks. Generated editor SDKs and settings are available for tools including VSCode, Vim, Emacs, and Neovim. Yarn runs on Linux, macOS, and Windows. It is free and open source, with no paid plans or usage limits stated. The documentation notes that React Native and Expo require node_modules installs. Yarn does not run security audits during installation by default; users can run yarn npm audit separately.
For and against
For
- Dependency resolution and lockfile support.
- Workspaces link packages within a project.
- Caches packages across projects on the same machine.
- Offline mirror and zero-installs workflow available.
- Runs on Linux, macOS, and Windows.
Against
- React Native and Expo require node_modules installs.
- Audits are not run during installation by default.
- Hardened mode checks can slow installs.
The verdict
Yarn supports multiple installation strategies and project workflows, with caching, workspaces, and plugin extensions. Consider its documented compatibility requirements and audit behavior when choosing an install setup.
Who it suits
Yarn suits developers working on JavaScript projects, including monorepos and enterprise projects. Its workspaces, plugins, and editor settings may also suit teams with varied project and tooling needs.
Plans and prices
Yarn
Open-source package manager; no paid plans or usage limits stated
Read 30 Sep 2026 · yarnpkg.com
On the record
- Alternative install modes
- Yarn PnP can be replaced with node_modules installs or pnpm-style symlink-based installs.yarnpkg.com · read 30 Sep 2026
- Audience
- Yarn says it serves simple projects and industry monorepos, including open-source developers and enterprise users.yarnpkg.com · read 30 Sep 2026
- Caching
- Yarn caches installed packages by default and shares them across projects on the same machine.yarnpkg.com · read 30 Sep 2026
- Compatibility limit
- The Yarn PnP documentation identifies React Native and Expo as requiring typical node_modules installs.yarnpkg.com · read 30 Sep 2026
- Dependency resolution
- Yesyarnpkg.com · read 22 Sep 2026
- Editor integrations
- Yarn provides generated editor SDKs and settings for tools including VSCode, Vim, Emacs, and Neovim.yarnpkg.com · read 30 Sep 2026
- Hardened mode
- In public GitHub pull requests, Yarn enables hardened mode by default to check lockfile resolutions and metadata against the remote registry; the checks can slow installs.yarnpkg.com · read 30 Sep 2026
- Install script behavior
- Since Yarn 4.14, postinstall scripts do not run by default and must be enabled globally or by package.yarnpkg.com · read 30 Sep 2026
- Lockfile support
- Yesyarnpkg.com · read 22 Sep 2026
- Maintainer model
- Yarn describes itself as an independent open-source project tied to no company, with its contributor community defining the roadmap.yarnpkg.com · read 30 Sep 2026
- Offline and zero installs
- Yarn documents an offline mirror and zero-installs workflow that can keep cached packages in the repository and reduce reliance on the npm registry.yarnpkg.com · read 30 Sep 2026
- Offline installation
- Yesyarnpkg.com · read 22 Sep 2026
- Package formats
- npm packages; tarballs; local,Git,link,patch,portal,and workspace referencesyarnpkg.com · read 22 Sep 2026
- Plugins
- Plugins can add resolvers, fetchers, linkers, CLI commands, and lifecycle hooks.yarnpkg.com · read 30 Sep 2026
- Plug'n'Play
- Yarn PnP is the default installation strategy in modern Yarn and generates a Node.js loader file instead of a typical node_modules folder.yarnpkg.com · read 30 Sep 2026
- Private registry auth
- Yesyarnpkg.com · read 22 Sep 2026
- Purpose
- Yarn is a package manager that also describes itself as a project manager.yarnpkg.com · read 30 Sep 2026
- Security audits
- Yarn does not run audits during yarn install by default; users can run yarn npm audit, which by default covers direct dependencies in the current workspace.yarnpkg.com · read 30 Sep 2026
