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Yarn vs Yeoman: What are the differences?

What is Yarn? A new package manager for JavaScript. Yarn caches every package it downloads so it never needs to again. It also parallelizes operations to maximize resource utilization so install times are faster than ever.

What is Yeoman? A set of tools for automating development workflow. Yeoman is a robust and opinionated set of tools, libraries, and a workflow that can help developers quickly build beautiful, compelling web apps. It is comprised of yo - a scaffolding tool using our generator system, grunt - a task runner for your build process and bower for dependency management.

Yarn can be classified as a tool in the "Front End Package Manager" category, while Yeoman is grouped under "Front End Scaffolding Tools".

"Incredibly fast" is the primary reason why developers consider Yarn over the competitors, whereas "Lightning-fast scaffolding" was stated as the key factor in picking Yeoman.

Yarn and Yeoman are both open source tools. It seems that Yarn with 36.2K GitHub stars and 2.22K forks on GitHub has more adoption than Yeoman with 9.23K GitHub stars and 759 GitHub forks.

According to the StackShare community, Yarn has a broader approval, being mentioned in 623 company stacks & 530 developers stacks; compared to Yeoman, which is listed in 205 company stacks and 201 developer stacks.

What is Yarn?

Yarn caches every package it downloads so it never needs to again. It also parallelizes operations to maximize resource utilization so install times are faster than ever.

What is Yeoman?

Yeoman is a robust and opinionated set of tools, libraries, and a workflow that can help developers quickly build beautiful, compelling web apps. It is comprised of yo - a scaffolding tool using our generator system, grunt - a task runner for your build process and bower for dependency management.
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What are some alternatives to Yarn and Yeoman?
npm
npm is the command-line interface to the npm ecosystem. It is battle-tested, surprisingly flexible, and used by hundreds of thousands of JavaScript developers every day.
Apache Mesos
Apache Mesos is a cluster manager that simplifies the complexity of running applications on a shared pool of servers.
Bower
Bower is a package manager for the web. It offers a generic, unopinionated solution to the problem of front-end package management, while exposing the package dependency model via an API that can be consumed by a more opinionated build stack. There are no system wide dependencies, no dependencies are shared between different apps, and the dependency tree is flat.
Webpack
A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows to load parts for the application on demand. Through "loaders" modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.
Zookeeper
A centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications.
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Decisions about Yarn and Yeoman
Tim Abbott
Tim Abbott
Founder at Zulip · | 5 upvotes · 19.4K views
atZulipZulip
Yarn
Yarn
npm
npm
Node.js
Node.js

I have mixed feelings on the Yarn/npm/Node.js ecosystem. We use it for Zulip, because you basically have to in order to have a modern JavaScript toolchain. And I like that Yarn lets us pin dependency versions out of the box for predictability in our production releases; we have to do significant work for the Python version of this feature.

But one also deals with broken third-party dependencies uploaded to npm way too often (even ignoring the malicious packages issues that have gotten a lot of press of late). And one mostly has to use nvm in order to pin a specific version of node itself in a maintainable way, and nvm is a mess.

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Russel Werner
Russel Werner
Lead Engineer at StackShare · | 5 upvotes · 10.7K views
atStackShareStackShare
Yarn
Yarn
npm
npm

We use Yarn because at the time we decided to adopt it, npm had some missing features and issues. We like the speed and determinism provided by Yarn. We could probably use npm at this point, but we have no real reason to switch from Yarn. If you have a convincing argument to switch from npm to Yarn please leave a comment on this decision!

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Johnny Bell
Johnny Bell
Senior Software Engineer at StackShare · | 17 upvotes · 665K views
Webpack
Webpack
Node.js
Node.js
Yarn
Yarn
npm
npm
Babel
Babel
Prettier
Prettier
ESLint
ESLint
#ES6
#ES5

So when starting a new project you generally have your go to tools to get your site up and running locally, and some scripts to build out a production version of your site. Create React App is great for that, however for my projects I feel as though there is to much bloat in Create React App and if I use it, then I'm tied to React, which I love but if I want to switch it up to Vue or something I want that flexibility.

So to start everything up and running I clone my personal Webpack boilerplate - This is still in Webpack 3, and does need some updating but gets the job done for now. So given the name of the repo you may have guessed that yes I am using Webpack as my bundler I use Webpack because it is so powerful, and even though it has a steep learning curve once you get it, its amazing.

The next thing I do is make sure my machine has Node.js configured and the right version installed then run Yarn. I decided to use Yarn because when I was building out this project npm had some shortcomings such as no .lock file. I could probably move from Yarn to npm but I don't really see any point really.

I use Babel to transpile all of my #ES6 to #ES5 so the browser can read it, I love Babel and to be honest haven't looked up any other transpilers because Babel is amazing.

Finally when developing I have Prettier setup to make sure all my code is clean and uniform across all my JS files, and ESLint to make sure I catch any errors or code that could be optimized.

I'm really happy with this stack for my local env setup, and I'll probably stick with it for a while.

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Yarn
Yarn

p.s.

I am not sure about the performance of the latest version of npm, whether it is different from my understanding of it below. Because I use npm very rarely when I had the following knowledge.

------⏬

I use Yarn because, first, yarn is the first tool to lock the version. Second, although npm also supports the lock version, when you use npm to lock the version, and then use package-lock.json on other systems, package-lock.json Will be modified. You understand what I mean, when you deploy projects based on Git...

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Mark Nelissen
Mark Nelissen
CTO at Gemsotec bvba · | 4 upvotes · 2.9K views
React
React
TypeScript
TypeScript
Yarn
Yarn
npm
npm

I use npm because I also mainly use React and TypeScript. Since several typings (from DefinitelyTyped) depend on the React typings, Yarn tends to mess up which leads to duplicate libraries present (different versions of the same type definition), which hinders the Typescript compiler. Npm always resolves to a single version per transitive dependency. At least that's my experience with both.

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Jason Barry
Jason Barry
Cofounder at FeaturePeek · | 4 upvotes · 21.4K views
atFeaturePeekFeaturePeek
Flow (JS)
Flow (JS)
TypeScript
TypeScript
React
React
JavaScript
JavaScript
Sublime Text
Sublime Text
Babel
Babel
Yarn
Yarn
npm
npm
#Frontend

I think our #Frontend stack is pretty standard – but we have taken some deviations from a typical modern stack:

  • Flow (JS) instead of TypeScript. Flow was an easy choice 2+ years ago, as both flow and React were (and still are) maintained by Facebook. Today, it seems that the JavaScript community has settled on TypeScript as the winner. For new projects, I'd choose TS, but I don't see the point in migrating an existing project from flowtype to TS, when the end result will be roughly the same. Sure, memory usage is a bit high, and every now and then I have to kill some zombie processes, but our text editors (Sublime Text), CI scripts, and Babel are already set up to take advantage of the type safety that flow offers. When/if the React team writes React itself in TS, then I'll take a closer look – until then, flow works for us.

  • Yarn instead of npm. When yarn debuted, we never looked back. Now npm has pretty much caught up with speed and lockfiles, but yarn gives me confidence that my dependency installs are deterministic. Really interested in the plug-n-play (PnP) feature that removes the need for a node_modules folder, but haven't implemented this yet.

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StackShare Editors
StackShare Editors
Node.js
Node.js
npm
npm
Yarn
Yarn

From a StackShare Community member: “I’m a freelance web developer (I mostly use Node.js) and for future projects I’m debating between npm or Yarn as my default package manager. I’m a minimalist so I hate installing software if I don’t need to- in this case that would be Yarn. For those who made the switch from npm to Yarn, what benefits have you noticed? For those who stuck with npm, are you happy you with it?"

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Interest over time
Reviews of Yarn and Yeoman
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How developers use Yarn and Yeoman
Avatar of Mick Dekkers
Mick Dekkers uses YarnYarn

Yarn is a wonderful alternative to the built-in npm command-line interface. Dependency installation is crazy fast, because it caches every package and performs operations in parallel.

Avatar of Volkan Özçelik
Volkan Özçelik uses YarnYarn

I prefer yarn instead of npm.

Both npm and yarn work great.

I don’t see any overwhelming reason to choose one over another.

I just like yarn, that’s it.

Avatar of Tim De Lange
Tim De Lange uses YeomanYeoman

Quick scaffolding of project stacks I'm not that familiar with. Having a nice build system to start with on a new project is worth a lot.

Avatar of Ambar
Ambar uses YarnYarn

We use it in every JS project. Blazing fast package manager for node.js. Easy to use in Docker containers

Avatar of Promethean TV
Promethean TV uses YeomanYeoman

Yeoman is used for code generation and automation of the Promethean TV Broadcast Center Tool.

Avatar of Coolfront Technologies
Coolfront Technologies uses YarnYarn

Used in Coolfront Mobile and "Charlie" (flat rate search engine) as packaging mechanism.

Avatar of Nick De Cooman
Nick De Cooman uses YeomanYeoman

Using Yeoman to generate skeleton projects. No experience with writing custom generators.

Avatar of Reactor Digital
Reactor Digital uses YeomanYeoman

Scaffolding the project's file directory as well as the AngularJS boilerplate.

Avatar of GHA Technologies
GHA Technologies uses YeomanYeoman

Used for scaffolding all our angular and some of our wordpress projects/demos.

Avatar of IVS
IVS uses YarnYarn

We tend to stick to npm, yarn is only a fancy alternative, not 10x better.

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