Blog of marc radziwill.

I blog about JavaScript, tech stuff and freelancing.

Introducing the Core Web Vitals for a healthy website

by Marc Radziwill | May 29, 2020 | 3 minutes to read

Categories: JavaScript, Webperformance

What are web vitals in why do we need them? Web vitals is an initiative introduced by Google. It helps us to understand the vitality of our website and to optimize the user experience. The Latter is a crucial indicator of long-term success. There are many tools for web performance experts…

My web performance experiment - a speed field trial

by Marc Radziwill | April 19, 2020 | 7 minutes to read

In my career as a web performance consultant and especially since I do performance workshops for companies and dev teams, I often recognize the same with performance problems. No matter how big the team or the project was, after some time, the application or website suddenly started being slower. I…

Tante Hilde - A free virtual marketplace for your local stores

by Marc Radziwill | April 18, 2020 | 3 minutes to read

Categories: Projects

We help searchers by bundling and clearly presenting all online and delivery offers in the Allgäu. We support the small shops and service providers in the Allgäu, which we have become fond of and which we painfully miss in times like these. (Tante Hilde) Tl;dr In the article, I want to tell you…

Mastering JavaScript high performance

by Marc Radziwill | March 12, 2020 | 8 minutes to read

Intro to JavaScript performance optimization JavaScript performance optimization techniques are simple to apply if you stick to some "rules" or better-said bits of advice. The implementation of these rules come with a minimum of understanding of how JavaScript engines work today. For the sake of…

svelte logo

How to use events in Svelte

by Marc Radziwill | January 20, 2020 | 2 minutes to read

Intro to Svelte events In my last article about Svelte I talked about the advatages in gerneral and how you can implement you first components, import them or display dynamic data. If you are new to Svelte you should read my article "Why you should try Svelte" . Today we talk about the cosmos of…

svelte logo

Why you should try Svelte

by Marc Radziwill | January 15, 2020 | 5 minutes to read

Intro to Svelte I recently came across the new rising star again when I watched the stateofjs 2019 . They received the "Prediction Award" which means they are "awarded to an up-and-coming technology that might take over… or not?". I read about Svelte last year but nothing caught me so that I forgot…

Can I use service workers for my website?

by Marc Radziwill | January 13, 2020 | 10 minutes to read

Intro to service workers So you probably landed here because you do not use service workers in your app and you want to know how they can help you. No need to worry. We go through all the service worker API in detail. Tl;dr In this post, I try to outline the main functionality of service workers…