The monorepo management tool Lerna has not been actively maintained for while. A git commit on 2022-04-20 made this status official. But now there is a new development: Nrwl, the company behind the monorepo build tool Nx is taking over the stewardship of Lerna.

Compares Nx, Turborepo, Lerna and workspaces (npm, yarn, pnpm) w.r.t. four layers:

• Layer 1: Plain old folders to stay on top of your code
• Layer 2: Tasks and pipeline to build your code efficiently
• Layer 3: Hoist your dependencies to boost npm installation
• Layer 4: Link your packages for immediate feedback

Covers:

1. Yarn, npm, and pnpm
2. Rush stack
3. Turborepo
4. Nx

Refactor and modernize your legacy code. With the P42 JavaScript Assistant.

Most internal tools are made of the same building blocks: tables, drop-downs, buttons, text inputs, etc. Rather than building a tool from scratch, Retool gives you a point, click, drag & drop interface that makes it simple to build internal UIs fast. But you're never limited by what's available out-of-the-box - you can customize anywhere using JavaScript. Join companies like Amazon, Doordash, and Brex and start building your internal tools in Retool.

Node.js 18.0.0 let us define tests via module 'node:test'. One downside was that we could only run tests by directly executing a test module. That limited us to running one test module at a time. This version adds the flag --test to the node binary that lets us run multiple test modules:

node --test test1.js test2.mjs # single files
node --test test/     # all modules inside directory test/
node --test some-dir/ # elsewhere: module basenames must end with '_test' etc.

The Node.js documentation has more information.

New feature: The no-underscore-dangle rule has the new option enforceInClassFields. If it is true, the names of public and private fields can’t start or end with underscores.

In JavaScript, the same syntax – triple dots (...) – is used for two different mechanisms:

• Rest syntax is for receiving data.
• Spreading is for sending data.

This blog post examines how these mechanisms work and why they are not operators.