Node.js's built-in test runner: is it worth ditching Jest?
A practical guide to node:test, Node.js's built-in test runner: zero-dependency setup, basic syntax, mocking, coverage, and what's still missing compared to Jest.
Fastify vs Express in 2026: which one for a new project
A practical comparison between Fastify and Express in 2026: performance, plugin architecture, schema-based validation, ecosystem maturity, and when to pick one over the other.
React Compiler: what changes for anyone writing components today
What the React Compiler actually does, when useMemo and useCallback become unnecessary, and why the Rules of React matter more than before.
Web Workers in JavaScript: how they work, and when (and how) to use them
What main thread blocking is, how to create a Web Worker to move heavy computation off the UI, and when you don't actually need one.
Advanced CSP: nonces, strict-dynamic and Trusted Types
Why unsafe-inline isn't enough, how CSP nonces and hashes work for a static site, what strict-dynamic is, and what Trusted Types is for.
AbortController: how to cancel a fetch in JavaScript
How to use AbortController and AbortSignal to cancel fetch requests and other async operations, avoiding race conditions and wasted network calls.
WebAuthn and Passkeys: how passwordless authentication really works
How the WebAuthn protocol behind passkeys works — public keys, attestation, a practical example — and why they're not just a more convenient alternative to passwords.
Core Web Vitals: LCP, CLS and INP explained with a real case
What LCP, CLS and INP actually measure, why your local Lighthouse often lies, and the real fixes applied on this blog to get past it.
Building a REST API with Fastify and TypeScript
A practical guide to Fastify with TypeScript: routing, schema validation, and plugin architecture, to build a fast, typed REST API from scratch.
UUID, ULID, NanoID and CUID2: which ID should you use in 2026?
A complete guide with JavaScript and TypeScript examples on UUID v4/v7, ULID, NanoID and CUID2.
Node.js - January 2026 Security Releases
Security updates for Node.js 25.x, 24.x, 22.x and 20.x: 3 high-severity vulnerabilities, 4 medium and 1 low. Here is what they fix and how to update.
WPDockerize: WordPress with Docker, made simple
wpdockerize is an npm package for creating a Docker stack for WordPress
Google Chrome won't connect to the local network on macOS
Having trouble getting Google Chrome to connect to local servers, e.g. .local addresses? Here is how to fix it
javascript:void(0), what is it?
What javascript:void(0) is and what it's for, with a few simple examples
Proxies in JavaScript
How JavaScript Proxies work, some code examples, and how to use them for reactivity in JS
Decorators in JavaScript
A simple guide to decorators in JavaScript with practical examples
Fit2Social web app
A small web app for resizing images for social networks (Facebook, Instagram, LinkedIn, TikTok)
Astro trailing slashes and canonical tags
How to correctly set slashes in URLs and canonical HTML tags for Astro-based applications
List of Dashicons names from the WordPress docs
Snippet to extract the list of Dashicons names from the WordPress documentation page
React: useActionState and useFormStatus
Let's look at a few examples of how React 19's new useActionState and useFormStatus hooks work
How Error Boundaries work in React, with examples
How Error Boundaries work in React: components that catch errors from their children to improve your app's stability and reliability.
Debounce and Throttle in JavaScript: A Simple Guide
Difference and examples between debounce and throttle for events in JavaScript
React: event handlers and hooks
How to correctly handle event handlers in React, including events on window like resize and scroll, avoiding the most common mistakes.
CSP: how Content Security Policy works
Content Security Policy, or CSP, is a set of rules that tell the browser how to behave when loading the content of our HTML page.
JavaScript: stopPropagation and preventDefault
How stopPropagation and preventDefault work in JavaScript to control event propagation and the browser's default behavior.
TypeScript 5.4: the new NoInfer utility
The new NoInfer<T> utility introduced in TypeScript 5.4 to control generic type inference, with practical examples.
Git log with graph and decorations
A mnemonic trick to remember the parameters of git log --all --decorate --oneline --graph: think of the phrase A Dog.
Guide to useReducer in React
A practical guide to React's useReducer hook: how it works, when to prefer it over useState, and a complete example for managing complex state.
using the HTTP HEAD method
How to request information about an HTTP resource without downloading its body
React: how useContext works (with examples)
How the useContext hook works in React to share data between components without props drilling, with a practical step-by-step example.
React: mistakes to avoid when using hooks
The most common mistakes to avoid when using React hooks: conditional calls, order, nested functions, and how to recognize them.
Portainer: updating your Docker instance the easy way
How to safely update your Portainer instance with a simple bash script, without losing containers or volumes.
React: useContext with useState
How to combine useContext and useState in React to share state and its update function between components, with a live example.
Crypto Miner (Coinhive) in YouTube Ads
During normal browsing on YouTube, at some point, the antivirus Avast reported something that was not good