In JavaScript, null and undefined cannot be more different. Here's why.

The Difference Between Null and Undefined

The good, the bad, and the ugly of the year 2023.

2023 Year in Review

Learn about the precautions to take if you are an open source maintainer looking for a job.

Looking For a Job As an Open Source Maintainer

The fetch Promise doesn't reject on error responses and that's entirely correct! Here's why.

Why Fetch Promise Doesn't Reject on Error Responses

One of the most common mistakes in configuring TypeScript.

One Thing Nobody Explained To You About TypeScript

Learn how to use Proxies to debug tricky issues in JavaScript.

Debugging Like A Pro-xy

Remix is a fantastic framework but it's not without its issues. Here are some of my struggles after building a few different projects with it.

My Struggle With Remix

GitHub Accelerator is a life-changing program on paper. In reality, it turned out a bit differently.

A Total Mess Behind GitHub Accelerator

Learn how to create custom Jest matchers to reduce the repetition in your tests and make them more readable.

Practical Guide to Custom Jest Matchers

Drawing from personal experience how open source can be a double-edged sword.

The Dark Side of Open Source

Coming from a non-technical background is challenging. Yet I wouldn't want to have studied software engineering regardless because it would've taken one little but incredibly important thing from me.

Why I Wouldn't Want to Have an Engineering Degree

Learn how to write custom webpack loaders with this example that transforms MP3 file imports into interactive audio players.

Writing a Custom Webpack Loader

Let's take a dive into what "higher-order" functions are, what problems they solve, and learn how to use them in practice.

Thinking in Functions, Part II: Higher-order Functions

Asking the right questions in engineering is hard. This article makes it a bit easier.

How To Ask Questions?

If you ever had a debate about which linting rule to use, you must read this.

The Plague of Linters

A missing guideline for JavaScript library authors on building and distributing a tree-shakable library using RollupJS.

Building a Tree-shakable Library with Rollup

Stop wasting hours on debugging failed CI jobs, when you can go to the very remote machine that run your tests, open its state, and solve the issue spot-on.

Efficient CircleCI debugging with SSH

A complete guide to learn the difference between debounce and throttle using visual examples. Never confuse the two again.

Debounce vs Throttle: Definitive Visual Guide

Function is a synonym for action. It's good when your actions have purpose, and their intent is clear. But how to write such functions?

Thinking in Functions, Part I: The Input/Output Pattern

Lessons learned from reviewing a team of 15 people throughout 2,5 years.

The Art of Code Review

Learn how to create clean and performant forms using React Advanced Form package.

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