React, TypeScript & JavaScript Articles

Everything published here, newest first. These are working notes from shipping production TypeScript and React: benchmarks run on real repos, migrations that took longer than the changelog implied, and the occasional tool that turned out not to be worth the setup. Nothing is sponsored, and where a free option beats a paid one, that's what you'll read.

Showing 1-12 of 107 articles

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Ubuntu 26.04 Runners and Node.js CI: What Changes First

GitHub's ubuntu-26.04 runner ships Node 24.21.0 by default where ubuntu-24.04 ships 22.23.3....

#nodejs#ci-cd

Oct 16, 2026

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Node.js 24.19.0 LTS: What Changed and Should You Upgrade

Node.js 24.19.0 adds blob.textStream(), a readFile buffer option and an httpValidation switch....

#nodejs#javascript#ci-cd

Oct 15, 2026

MCP Server in Your Workflow: Spec Versions and Typed Tools

The MCP spec is on revision 2026-07-28, the SDK you npm install...

#typescript#ai-tools#tooling

Oct 9, 2026

Fix TS2349 and TS2531 in React Component State, Fast

TS2349 'not callable' and TS2531 'possibly null' in React state, reproduced under...

#typescript#react

Oct 9, 2026

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Charting Home Energy Data With Recharts and TypeScript

Turn Home Assistant history into usable charts: time-series bucketing, downsampling that keeps...

#react#typescript

Oct 7, 2026

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GitHub Copilot Workspace for a TypeScript Monorepo

GitHub Copilot Workspace loses context fast in a large monorepo without the...

#typescript#package-managers#ai-tools

Oct 5, 2026

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JavaScript Event Loop: Microtasks vs Macrotasks in 2026

A code-first look at the JavaScript event loop, showing the actual execution...

#nodejs#javascript

Oct 3, 2026

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Migrate to pnpm From Yarn, npm or Bun: Tested Steps

Moving a Yarn 4, Yarn 1, npm or Bun project to pnpm...

#nodejs#package-managers#migration

Oct 3, 2026

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Jest to Vitest 5 Migration: What 240 Tests Measured

Jest 30 against Vitest 5.0.3 on the same 240 tests, timed cold...

#testing#migration#tooling

Oct 2, 2026

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MCP Apps in React: Render a Real UI Inside an AI Chat

MCP Apps let a tool return a sandboxed React UI instead of...

#react#typescript#build-tools

Oct 2, 2026

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ESLint on TypeScript 7: Why the Peer Range Blocks npm

typescript-eslint 8.71.0 caps TypeScript at <6.1.0, so TS 7.0.2 fails with ERESOLVE...

#typescript-7#typescript#code-quality

Oct 1, 2026

A wooden rack of glass test tubes filled with brightly colored liquids

React Component Testing with Vitest 5: Setup and Pitfalls

A React 19 test setup on Vitest 5.0.2 and Testing Library 16,...

#react#typescript#testing

Sep 30, 2026