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プロジェクトリンク

• ホームページ
• リポジトリ
• 上流ドキュメント
• パッケージマネージャページ

コマンドとエイリアス

• yarn
• yarnpkg

プロジェクトの歴史

Yarn was open-sourced on 2016-10-11 as a collaboration between Facebook, Exponent, Google, and Tilde. The launch post emphasized continued access to the npm registry while improving speed, consistency across machines, and secure offline operation.

The 1.x line established the features that made Yarn famous: a lockfile, deterministic installs, a global cache, offline mode, checksums, concurrency, and workspace-oriented workflows. The classic repository README now says the 1.x codebase is frozen except for historical upkeep and occasional hotfixes.

Modern Yarn moved to the yarnpkg/berry repository, created in 2018. Yarn 2.0 shipped on 2020-01-24 after a year of intensive development, bringing a TypeScript codebase, plugin architecture, Plug'n'Play, workspace-aware commands, a YAML lockfile/config model, and a different release and migration story from classic Yarn. Yarn 4.0 followed in 2023 after a long release-candidate cycle focused on reducing migration pain and improving user experience.

採用の歴史

Yarn's adoption was fast because it solved immediate pain in large JavaScript dependency trees: slow installs, non-determinism, network fragility, and inconsistent environments. It did not replace the npm registry; it competed at the client and workflow layer while consuming the same package ecosystem.

Classic Yarn became common in CI systems, monorepos, front-end applications, and open-source JavaScript projects. Later Yarn adoption split into two cultures: projects staying on stable 1.22.x for node_modules compatibility and projects moving to Berry for Plug'n'Play, constraints, plugins, workspaces, and zero-install workflows.

使われ方

Typical classic workflows are `yarn install`, `yarn add`, `yarn remove`, `yarn upgrade`, and `yarn run`, with `yarn.lock` committed so dependency resolution is reproducible. Workspaces let monorepos manage multiple packages in a single install graph.

Modern Yarn expands that usage into project management: `yarn set version`, plugins, constraints, workspace foreach commands, patch protocols, portable script execution, and selectable install strategies including node_modules and Plug'n'Play.

パッケージ好きにとっての重要性

Yarn is one of the defining package-manager projects of the 2010s because it forced JavaScript tooling to treat reproducibility, lockfiles, cache behavior, and CI determinism as first-class package-manager features. Its competition with npm changed expectations for every JavaScript dependency client that followed.

For package nerds, Yarn is also a rare case where the package manager itself has two living historical identities: Yarn Classic as the widely packaged 1.x executable and Yarn Berry/Modern as the active architecture with plugins, PnP, and project-management features.

タイムライン

• 2016-01-19: yarnpkg/yarn repository is created on GitHub.
• 2016-10-11: Yarn is announced as a Facebook, Exponent, Google, and Tilde collaboration.
• 2016-10-18: GitHub release v0.16.0 is published shortly after launch.
• 2018-09-10: yarnpkg/berry repository is created for the modern Yarn line.
• 2020-01-24: Yarn 2.0 is released after 365 days of development.
• 2023-10-23: Yarn 4.0 is announced after 53 release candidates.
• 2024-03-09: Yarn Classic v1.22.22 is published.

Related projects

• npm is the registry and original package-manager client Yarn was designed to interoperate with and improve upon.
• yarnpkg/berry is the active modern Yarn repository.
• Bundler and Cargo are named by the classic README as prior art.

ソース

• https://api.github.com/repos/yarnpkg/berry
• https://api.github.com/repos/yarnpkg/yarn
• https://api.github.com/repos/yarnpkg/yarn/releases?per_page=100
• https://classic.yarnpkg.com/blog/2016/10/11/introducing-yarn/
• https://github.com/yarnpkg/berry
• https://github.com/yarnpkg/yarn
• https://raw.githubusercontent.com/yarnpkg/berry/master/README.md
• https://raw.githubusercontent.com/yarnpkg/yarn/master/README.md
• https://yarnpkg.com/blog/release/2.0
• https://yarnpkg.com/blog/release/4.0
• https://yarnpkg.com/migration/overview