I'm Felix and I'm a web developer.

I use this blog for writing about the things I learn and what I'm interested in.

Lately, this includes React, PWAs, and frontend performance.

Post thumbnail

Service Worker Lifecycle Explained

29/05/20 | 6 min
Explaining the lifecycle of Service Workers in PWAs and how to update them as fast as possible.

Post thumbnail

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

18/05/20 | 14 min
Full tutorial on how to transform your current React app into a Progressive Web App - Explaining the most important concepts around PWAs followed by a step by step tutorial, using Webpack, Workbox and TypeScript.
Post thumbnail

When does React re-render components?

26/04/20 | 7 min
React re-rendering explained and how to optimize React's re-render performance
Post thumbnail

React Performance Optimization with React.memo()

19/04/20 | 3 min
React performance optimization with React.memo – Explaining how to use it, common pitfalls and why you shouldn't be using it for all your components.
Post thumbnail

Getting into Performance Budgets

10/04/20 | 7 min
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.
Post thumbnail

Premature Optimization in JavaScript

04/04/20 | 3 min
In this article I'll explain what premature optimization and premature pessimization are and what kind of optimizations JavaScript developers should use.
Post thumbnail

Custom Metrics with WebPageTest and TravisCI

29/03/20 | 7 min
Learn how to set up custom metrics using WebPageTest API and TravisCI
Post thumbnail

Measuring the Performance of JavaScript Functions

25/03/20 | 7 min
Start measuring your JavaScript function's performance with these APIs and learn how to use them.
Post thumbnail

How to communicate with Service Workers

22/02/20 | 4 min
This article gives you an overview of the MessageChannel, Broadcast API and Client API and helps you to decide which one to use.
Post thumbnail

PWA Update Notification with Create React App

27/01/20 | 4 min
Learn how to trigger update notifications that ensure that your users are using the latest version of your Progressive Web App.