Which is Better JavaScript Package Manager?
yarn vs npm

JavaScript Package Manager refers to a tool to manage the installation, updating, and removal of JavaScript packages or libraries in a development project. These package managers are tailored specifically for JavaScript ecosystem and are used to handle dependencies for JavaScript projects.

Package	Weekly Downloads	Github Stars	Open Issues	Last Commit	License

npm	5,748,710	7,971	755	a day ago	Other
yarn	5,385,174	41,322	2,002	9 days ago	Other

Featuresyarnnpm
 
 
 
Package Manager TypeYarn is another popular package manager for JavaScript and Node.js. It was created as an alternative to npm, offering faster and more reliable dependency management.
npm (Node Package Manager) is the default package manager for Node.js and JavaScript. It is widely used for managing project dependencies.
Dependency DeduplicationYarn has built-in dependency deduplication to avoid duplicating packages in the project's dependencies.
npm introduced dependency deduplication with npm v7, reducing duplication of packages in the node_modules folder.
Installation SpeedYarn is known for its fast and parallelized package installations, which can significantly speed up the process.
npm has improved installation speed with npm v7 by implementing a more efficient algorithm.
Local CachingYarn also uses a local cache to store packages, making them available for offline use and faster installations.
npm has a local cache for packages, improving installation speed and allowing offline installation.
Workspace SupportYarn has supported workspaces for managing monorepositories and multiple packages for some time, offering a mature solution.
npm introduced workspace support with npm v7, allowing you to manage multiple packages within a single repository.
Ecosystem and CommunityYarn has a strong community and is widely used, with a rich ecosystem of packages and tools.
npm has a large and established ecosystem with extensive support and a vast number of packages.
Ease of MigrationMigrating from npm to Yarn or between Yarn versions is generally straightforward and well-supported.
npm has a straightforward migration path to npm v7, and the process is well-documented.

Features	yarn	npm

Package Manager Type	Yarn is another popular package manager for JavaScript and Node.js. It was created as an alternative to npm, offering faster and more reliable dependency management.	npm (Node Package Manager) is the default package manager for Node.js and JavaScript. It is widely used for managing project dependencies.
Dependency Deduplication	Yarn has built-in dependency deduplication to avoid duplicating packages in the project's dependencies.	npm introduced dependency deduplication with npm v7, reducing duplication of packages in the node_modules folder.
Installation Speed	Yarn is known for its fast and parallelized package installations, which can significantly speed up the process.	npm has improved installation speed with npm v7 by implementing a more efficient algorithm.
Local Caching	Yarn also uses a local cache to store packages, making them available for offline use and faster installations.	npm has a local cache for packages, improving installation speed and allowing offline installation.
Workspace Support	Yarn has supported workspaces for managing monorepositories and multiple packages for some time, offering a mature solution.	npm introduced workspace support with npm v7, allowing you to manage multiple packages within a single repository.
Ecosystem and Community	Yarn has a strong community and is widely used, with a rich ecosystem of packages and tools.	npm has a large and established ecosystem with extensive support and a vast number of packages.
Ease of Migration	Migrating from npm to Yarn or between Yarn versions is generally straightforward and well-supported.	npm has a straightforward migration path to npm v7, and the process is well-documented.

yarn

npm

Fast, reliable, and secure dependency management.

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.
More emojis. 🐈

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

Contributions are always welcome, no matter how large or small. Substantial feature requests should be proposed as an RFC. Before contributing, please read the code of conduct.

See Contributing.

Prior art

Yarn wouldn't exist if it wasn't for excellent prior art. Yarn has been inspired by the following projects:

Credits

Thanks to Sam Holmes for donating the npm package name!