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Lazy loading React components with React.lazy

Learn how to improve performance by reducing the bundle size of your application.

React Component Composition Explained

Learn how to use component composition to organize your code and improve performance.

Building a SaaS application from scratch

In this article, I talk about my experience of building a full-stack SaaS product as a side project.

Using setTimeout in React components (including hooks)

Using timeouts in React isn't as straightforward as you may think. In this article, you'll learn how to avoid mistakes when using them in React.

How to use React's forwardRef function

React's references don't always behave like you would expect them to. In this tutorial, you'll learn why and how you can use the forwardRef function.

How to test Redux-connected React components

Writing unit tests for Redux-connected React components can be tricky. This article explains how you can create your tests easily without mocking the entire store manually.

React Context Examples

How to use React Context with TypeScript

Learn how to use React Context and how to make it TypeScript-compatible.

Separation of concerns with React hooks

Separation of concerns is a common topic in software development. Learn how you can apply this concept to React with custom hooks.

JavaScript iterators and generators: A complete guide

Iterators and generators are JavaScript features that can be hard to understand. In this article, I will try to explain it as easy as possible.

How to easily manipulate URL search parameters in JavaScript

Learn what you need to know about working with URL search parameters.

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Form validation with React Hooks WITHOUT a library: The Complete Guide

In this article, I walk you through the process of creating a hook that you can use for managing forms without the use of a library.

React and TypeScript: How to find the right event type

When getting started with TypeScript, finding the right interfaces can be challenging. In this article, you'll learn how to find the correct TypeScript interface for React events in any situation.

How TypeScript helps you build better React apps

In which situations should you give React with TypeScript a try, and when is it better to stick to JavaScript? Speaking of my own experience, I walk you through the pros and cons of a TypeScript based frontend.

How to create React components with TypeScript

Getting started with React and TypeScript

Learn how to add TypeScript to your React projects.

How to use React's useHistory() hook

Learn how to use the useHistory hook to get the most out of React's functional components.

How to use React's useRef() hook

Learn how to use the useRef hook to get the most out of React's functional components.

How to use React's useEffect() hook

Learn how to use the useEffect hook to get the most out of React's functional components.

My Favorite Programming Books 2020

A description of the programming related books I enjoyed reading this year.

JavaScript Heap Out Of Memory Error

This error indicates high memory usage or a memory leak in your application. In this article, I cover different solutions to this problem.

JavaScript's Memory Management Explained

Even though the JavaScript engine manages memory for us, it's good to know what happens under the hood.

forEach() vs. map() — JavaScript Array Function Comparison

This article does a quick comparison of the two JavaScript functions. After reading this, you should know when to use which function and why.

JavaScript Event Loop And Call Stack Explained

Learn how JavaScript works in the browser: In this article, I explain how the call stack, event loop, job queue and more work together.

What is Project Fugu? More power to the web

Learn more about this awesome project that makes the web more powerful by adding native features.

How to Persist React State in Local Storage

Learn how to persist the data of your React application, using local storage.

My 9 favorite topics of "The Pragmatic Programmer"

After reading the 20th-anniversary edition of the book, these are the summaries of my key-takeaways.

How to Create Web Push Notifications - Full Tutorial

Push notifications have come to the web! In this tutorial, I'll show you how to create a full-stack application that is able to send and receive web push notifications.

Unit testing React - What you need to know

Starter guide to unit testing for React developers, covering the basics of unit testing, tools and some pitfalls you might encounter.

Periodic Background Sync Explained

Exploring the periodic background sync JavaScript API, using an example application.

Service Workers Explained - Introduction to the JavaScript API

Introduction to Service Workers, explaining the most important concepts and features.

Top 10 Web Developer Blogs in 2020

Top blogs by real humans about web development to read in 2020

High Performance Mobile Web by Maximiliano Firtman - Review and notes

My review and thoughts on the book plus the personal notes I took while reading it.

Service Worker Lifecycle Explained

Explaining the lifecycle of Service Workers in PWAs and how to update them as fast as possible.

How to Make your React App a Progressive Web App (PWA)

Explaining the most important concepts around PWAs followed by a step by step tutorial, using Webpack, Workbox and TypeScript.

When does React re-render components?

React re-rendering explained and how to optimize React's re-render performance

How to use React.memo() to improve performance

Learn how to use React.memo, some common pitfalls you might encounter, and why you shouldn't use React.memo for all your components.

Getting into Performance Budgets

In this article, I'll give you an introduction to performance budgets, the metrics and tools you can use and how you can implement them in your company.

Premature Optimization in JavaScript

In this article I'll explain what premature optimization and premature pessimization are and what kind of optimizations JavaScript developers should use.

Custom Metrics with WebPageTest and TravisCI

Learn how to set up custom metrics using WebPageTest API and TravisCI

Measuring the Performance of JavaScript Functions

Start measuring your JavaScript function's performance with these APIs and learn how to use them.

How to communicate with Service Workers

This article gives you an overview of the MessageChannel, Broadcast API and Client API and helps you to decide which one to use.

PWA Update Notification with Create React App

Learn how to trigger update notifications that ensure that your users are using the latest version of your Progressive Web App.