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README
ℹ️ Important note
This repository holds the sources for Yarn 1.x (latest version at the time of this writing being 1.22). New releases (at this time the 3.2.3, although we're currently working on our next major) are tracked on the yarnpkg/berry repository, this one here being mostly kept for historical purposes and the occasional hotfix we publish to make the migration from 1.x to later releases easier.
If you hit bugs or issues with Yarn 1.x, we strongly suggest you migrate to the latest release - at this point they have been maintained longer than 1.x, and many classes of problems have already been addressed there. By using the nodeLinker setting you'll also have the choice of how you want to install your packages: node_modules like npm, symlinks like pnpm, or manifest files via Yarn PnP.
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Fast, reliable, and secure dependency management.
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Fast: Yarn caches every package it has downloaded, so it never needs to download the same package again. It also does almost everything concurrently to maximize resource utilization. This means even faster installs.
Reliable: Using a detailed but concise lockfile format and a deterministic algorithm for install operations, Yarn is able to guarantee that any installation that works on one system will work exactly the same on another system.
Secure: Yarn uses checksums to verify the integrity of every installed package before its code is executed.
Features
Offline Mode. If you've installed a package before, then you can install it again without an internet connection.
Deterministic. The same dependencies will be installed in the same exact way on any machine, regardless of installation order.
Network Performance. Yarn efficiently queues requests and avoids request waterfalls in order to maximize network utilization.
Network Resilience. A single request that fails will not cause the entire installation to fail. Requests are automatically retried upon failure.
Flat Mode. Yarn resolves mismatched versions of dependencies to a single version to avoid creating duplicates.
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Installing Yarn
Read the Installation Guide on our website for detailed instructions on how to install Yarn.
Using Yarn
Read the Usage Guide on our website for detailed instructions on how to use Yarn.
Contributing to Yarn
The 1.x codebase is fairly old and will only accept security fixes. For new features or bugfixes, please Top issues
#7807Failed to install dependencies in workspace: expected workspace package to exist131 comments · 2020-01-08#1297Yarn link doesn't work81 comments · 2016-10-20#4986How to upgrade indirect dependencies?75 comments · 2017-11-23#7734CLI functionality related to aggregator preventing yarn commands 1.19-1.22 - Reverted to 1.1666 comments · 2019-12-04#5349Yarn does not work in Git Bash on Windows66 comments · 2018-02-10#7212Spurious "Extracting tar content of undefined failed"62 comments · 2019-04-20#6953Yarn's Future - v2 and beyond56 comments · 2019-01-24#1684How to use --modules-folder flag?56 comments · 2016-11-04
Latest release
v1.22.22 v1.22.22 2024-03-09- Fixes a punycode warning. - Fixes a hoisting issue when transitive dependencies themselves listed aliases as dependencies.