nyc VS lerna

Compare nyc vs lerna and see what are their differences.

nyc

the Istanbul command line interface (by istanbuljs)

lerna

:dragon: Lerna is a fast, modern build system for managing and publishing multiple JavaScript/TypeScript packages from the same repository. (by lerna)
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nyc lerna
16 162
5,512 35,291
0.4% 0.3%
0.0 9.1
about 1 month ago 6 days ago
JavaScript TypeScript
ISC License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

nyc

Posts with mentions or reviews of nyc. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-12-14.
  • Migrating from Jest to Vitest for your React Application
    16 projects | dev.to | 14 Dec 2023
    Native code coverage via v8 or istanbul.
  • Testing Vue components the right way
    2 projects | dev.to | 6 Feb 2023
    Writing tests is essential, and knowing whether you test all the required cases for your logic is even more critical. The most common testing coverage tool is Istanbul, where you can see how well your tests exercise your code by lines, functions, and branches. Below is an example of how the test coverage report looks in your terminal:
  • Don't target 100% coverage
    3 projects | dev.to | 19 Jan 2023
    Here is a quote from istanbul, one of the most used code coverage tool:
  • Unit testing like a Hacker
    6 projects | dev.to | 28 Oct 2022
    Unit testing framework was already implemented, using Vitest so I started hacking by setting up a coverage provider to explicitly identify the covered/uncovered lines and mentioned this to the maintainer in the comments. I used Istanbul 🇹🇷 for this purpose.
  • Auto-Publish Your Test Coverage Report on GitHub Pages
    2 projects | dev.to | 28 Oct 2022
    Your project probably has a coverage report. If you’re using Jest as your unit test runner, generating a coverage report is embedded in it. It is done with Istanbul under the hood, which generates a nice HTML page presenting the entire project unit test coverage.
  • Dear Linux, Privileged Ports Must Die
    2 projects | news.ycombinator.com | 31 Aug 2022
    > This is a rant written by someone with just enough understanding to be dangerous, but not quite enough wisdom to know why things are still the way they are. Most of the complaints raised are subtly inaccurate.

    Author seems aware of CAP_NET_BIND_SERVICE: https://source.small-tech.org/site.js/app/-/issues/169 and https://github.com/istanbuljs/nyc/issues/1281 – the "side effects" are NodeJS explicitly checking for it, so that's a NodeJS thing and not a Linux thing.

    Yet curiously it's completely unmentioned in this article, in spite that this is probably what started the author's dislike of privileged ports. I guess it was inconvenient as it got in the way of angrily ranting.

  • Comprehensive coverage Jest+Playwright in Next.js TS
    7 projects | dev.to | 29 Jun 2022
    This approach will create two json coverage files, which will be merged together by NYC. Therefore the results will be purely local. If You don't mind using online tools like Codecov or Coveralls for merging data from different tests, then go ahead and use them. They will probably also be more accurate. But if You still want to learn how to get coverage from E2E, then please read through
  • When developing in React, what do you find most frustrating or cumbersome?
    3 projects | /r/reactjs | 14 Mar 2022
    https://istanbul.js.org/ measures how much of your code is covered by tests
  • Production Ready React
    3 projects | dev.to | 18 Jan 2022
    Jest uses a package called Istanbul to provide test coverage metrics such as statement, branch, function, and line coverage so that you can understand and enforce the quality of your test suite, providing more confidence in releases.
  • Aggregating Unit Test Coverage for All Monorepo’s Packages
    3 projects | dev.to | 31 Dec 2021
    So let’s see if nyc (the code coverage generator) can help with that. Hmm… this documentation seems interesting! So basically what I understand from it is that I need to collect all the reports from the different packages and then run the nyc report over it. The flow should be like this:

lerna

Posts with mentions or reviews of lerna. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-03-28.
  • Add Step-up Authentication Using Angular and NestJS
    4 projects | dev.to | 28 Mar 2024
    Open the project up in your favorite IDE. Let's take a quick look at the project organization. The project has an Angular frontend and NestJS API backend housed in a Lerna monorepo. If you are curious about how to recreate the project, check out the repo's README file. I'll include all the npx commands, CLI commands, and the manual steps used to create the project.
  • Things I learned while building projects with NX
    5 projects | dev.to | 18 Mar 2024
    Lerna currently maintained by Nx team
  • tsParticles 3.0.0 is out. Breaking changes ahead.
    3 projects | dev.to | 4 Dec 2023
  • Nx 16.8 Release!!!
    5 projects | dev.to | 6 Sep 2023
    On Netlify's enterprise tier, approximately 46% of builds are monorepos, with the majority leveraging Nx and Lerna. Recognizing this trend, Netlify has focused on enhancing the setup and deployment experiences for monorepo projects. In particular they worked on an "automatic monorepo detection" feature. When you connect your project to GitHub, Netlify automatically detects if it's part of a monorepo, reads the relevant settings, and pre-configures your project. This eliminates the need for manual setup. This feature also extends to local development via the Netlify CLI.
  • Mocha/Chai with TypeScript (2023 update)
    3 projects | dev.to | 12 Aug 2023
  • Help with library implementation in a big webapp
    2 projects | /r/webdev | 26 Jun 2023
    This is the exact problem monorepos were born to solve. Not only will a monorepo let you share UI components, you'll be able to gradually add shared application logic as well (for instance, do all of your apps have their own logic for connecting to a database? you could roll that into a shared library with a monorepo). There are a lot of tools for accomplishing this in JS, but probably the most popular is lerna, which is built on top of NX (though lots of teams roll their own monorepo in nx without lerna, which IMO is a totally valid option).
  • How to Build and Publish Your First React NPM Package
    8 projects | dev.to | 9 Jun 2023
    To begin, you need to prepare your environment. A few ways to build a React package include tools like Bit, Storybook, Lerna, and TSDX. However, for this tutorial, you will use a zero-configuration bundler for tiny modules called Microbundle.
  • Utility for making sure that I'm using the right `@types/react`
    2 projects | /r/typescript | 5 Jun 2023
    If so, are you using a monorepo tool like Nx or Lerna? If not, start there and see if it solves your problem.
  • [AskJS] Is there a silver bullet for consuming Typescript libraries in a Monorepo?
    5 projects | /r/javascript | 9 May 2023
    I mean I don't know what your monorepo looks like, but for example infernojs (actually written with typescript) uses lerna, and lerna seems simpler than typescript references
  • Understanding npm Versioning
    3 projects | dev.to | 4 Apr 2023
    Tools for publishing, such as Lerna (when using the --conventional-commit flag), follow this convention when incrementing package versions and generating changelog files.

What are some alternatives?

When comparing nyc and lerna you can also consider the following projects:

turborepo - Incremental bundler and build system optimized for JavaScript and TypeScript, written in Rust – including Turborepo and Turbopack. [Moved to: https://github.com/vercel/turbo]

nx - Smart Monorepos · Fast CI

jest - Delightful JavaScript Testing.

changesets - 🦋 A way to manage your versioning and changelogs with a focus on monorepos

pnpm - Fast, disk space efficient package manager

istanbul - Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use cases including unit tests, server side functional tests and browser tests. Built for scale.

webpack - A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows for loading parts of the application on demand. Through "loaders", modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.

single-spa - The router for easy microfrontends

husky - Git hooks made easy 🐶 woof!

rushstack - Monorepo for tools developed by the Rush Stack community

Cucumber.js - Cucumber for JavaScript

nvm - Node Version Manager - POSIX-compliant bash script to manage multiple active node.js versions