--- title: "Kars van Iersel (@Karsvaniersel) | Hashnode" description: "I develop websites and web apps. Read the latest articles by Kars van Iersel on Hashnode." url: "https://hashnode.com/@Karsvaniersel" --- @Karsvaniersel # Kars van Iersel @Karsvaniersel · Amsterdam, the Netherlands · Joined August 2021 I develop websites and web apps [Website](https://waiteros.com/) ### [The one and only SEO checklist you will ever need](https://karsvaniersel.com/seo-checklist?utm_source=hashnode&utm_medium=feed) If you are an SEO newbie or have some experience but would like to get a step-by-step SEO guide on how to avoid common website promotion mistakes, here's a list of SEO tasks based on best practices that you should take into account when creating and ... 17 min read · [karsvaniersel.com](https://karsvaniersel.com/seo-checklist?utm_source=hashnode&utm_medium=feed) [2](https://hashnode.com/posts/seo-checklist/61273e7d22e1ba252a87e957) [Aug 26, 2021](https://hashnode.com/posts/seo-checklist/61273e7d22e1ba252a87e957) ### [Let me introduce you to Inertia.js, something you didn't know you were missing](https://karsvaniersel.com/inertia-js-introduction?utm_source=hashnode&utm_medium=feed) Introduction Roughly a year ago I had to make a very large scale application and I couldn't decide on a backend framework. However, I knew I wanted to use Vue.js as my front-end. So I began my long quest the ideal framework for my backend. I had doub... 7 min read · [karsvaniersel.com](https://karsvaniersel.com/inertia-js-introduction?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/inertia-js-introduction/6126899e22e1ba252a87deb2) [Aug 25, 2021](https://hashnode.com/posts/inertia-js-introduction/6126899e22e1ba252a87deb2) ### [Why you are not focused as a web developer](https://karsvaniersel.com/why-you-are-not-focused-as-a-web-developer?utm_source=hashnode&utm_medium=feed) 6 Tips on how to be more focused as a web developer 4 min read · [karsvaniersel.com](https://karsvaniersel.com/why-you-are-not-focused-as-a-web-developer?utm_source=hashnode&utm_medium=feed) [Aug 24, 2021](https://hashnode.com/posts/why-you-are-not-focused-as-a-web-developer/612507e3663d427e19ffa7cd) ### [Why every developer should be using TDD](https://karsvaniersel.com/why-every-developer-should-be-using-tdd?utm_source=hashnode&utm_medium=feed) Introduction No skill is more important for programmers than the ability to write code that works. But all too often, developers don't think about whether their code will work until it's finished, and by then they've already created many bugs that ar... 5 min read · [karsvaniersel.com](https://karsvaniersel.com/why-every-developer-should-be-using-tdd?utm_source=hashnode&utm_medium=feed) [3](https://hashnode.com/posts/why-every-developer-should-be-using-tdd/6124ca1eb115357df05f3a0d) [Aug 24, 2021](https://hashnode.com/posts/why-every-developer-should-be-using-tdd/6124ca1eb115357df05f3a0d) ### [CSS the :not() selector](https://karsvaniersel.com/css-the-not-selector?utm_source=hashnode&utm_medium=feed) Intro In my previous post I wrote a bit about the :not() selector and I got a lot feedback that people never heard of this element. So I figured I would dedicate a post just to the :not() CSS selector. What is the :not() selector in CSS? The :not() i... 3 min read · [karsvaniersel.com](https://karsvaniersel.com/css-the-not-selector?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/css-the-not-selector/61268f1122e1ba252a87deec) [Sep 2, 2020](https://hashnode.com/posts/css-the-not-selector/61268f1122e1ba252a87deec)