First load performance is important, but it's not everything. Users who load your site a second time will use their cache to get access to your content—so it's key to make sure it works well too, both for speed and correctness.

A get-right-down-to-it online course for Web designers and developers who want to start creating more accessible Web user interfaces and digital products today

De quoi parle-t-on lorsque l’on évoque la souveraineté numérique ? Comment s’exerce le pouvoir des États et citoyens dans l’espace numérique ?

Empreinte environnementale du numérique en France : l’ADEME et l’Arcep remettent leur premier rapport au gouvernement

The UK government's design principles and examples of how they've been used.

Accessibility guidance for DWP and the Public Sector Bodies Accessibility Regulations 2018

Missguided are one of the UK's most innovative and fast-moving fashion retailers but as with many other retailers, web performance hasn't always been our highest priority.

There's been an explosion in 3rd-Party Tags… And as Tim Kadlec once said

I’ve researched and learned enough about client-side memory leaks to know that most web developers aren’t worrying about them too much. If a web app leaks 5 MB on every interaction, but…

À quoi faisons-nous attention ? De sa qualité à sa manipulation, les enjeux de la protection de notre attention à l’heure du numérique sont majeurs. Le Conseil national du numérique appelle à passer un cap dans la protection de notre attention et publie ce jour un dossier intitulé « Votre attention, s’il vous plaît ! Quels leviers face à l’économie de l’attention ? ». Au sommaire :

Bulli Bai is just the latest in GitHub's list of moderation failures.

You're not too stupid to understand what's going on.

A resource for cultivating awareness of when and how cognitive bias can be introduced into the design process.

Le jeu vidéo est accessible à tous les niveaux, même aux débutants.

User experience vs. diagnostic metrics A few years ago, Google introduced the Core Web Vitals metrics. If you've been following web performance for a while, you know there are already a lot of metrics. Dozens and dozens of them, and new ones are being experimented with continually. So it's not surpr

Social media and many other facets of modern life are destroying our ability to concentrate. We need to reclaim our minds while we still can

In this article, we'll analyze Terra's journey from identifying the size of the "dark mode" cohort, to applying a custom dark theme, and finally measuring the impact of this implementation on their main KPIs.

The carbon footprint of streaming video: fact-checking the headlines - A commentary by George Kamiya

It was pouring with rain and I found myself driving. I didn’t know where I was going. I just needed out of the house. I needed to escape. After what felt like an age I found myself parked outside my parents' house, just staring at their front door. Eventually I got out of the car, rang the doorbell and burst into tears the moment my mum answered.

We all know them: programmers with long term experience stuck on a low-level of our craft not corresponding to their quantity of experience. Great programmers are creative workers and problem-solvers and one of their most important traits is: never stop learning – but getting stuck in its own comfort zone and becoming reluctant to change is deeply wired into human nature (Humans are hard-wired to follow the path of least resistance).

If you’re reading this then you are a participant in the modern web. The web we are experiencing today is much different than what it was just 10 years ago. How has the web evolved, and more importantly – where is it going next? Also, why do any of these

Let’s look how to make the product page faster (& increase the conversion)

HTTP compression is an important part of the big web performance picture. We'll cover the history, the current state and the future of web compression. Lossless data compression makes things smaller Lossless data compression algorithms exploit statistical redundancy to represent data using fewer bit

Préciser la quantité de gaz à effet de serre générés par la consommation de données : voilà la nouvelle information que les opérateurs auront l'obligation de préciser chaque mois en 2022. Une idée qui provoque une levée de boucliers dans le secteur du numérique. Nouvelle polémique en vue concernant l'impact du

Editeurs de sites web, voici un outil et des recettes pour réduire votre impact environnemental

What exactly is HTTP/3? Why was it needed so soon after HTTP/2 (which was only finalized in 2015)? How can or should you use it? And especially, how does this improve web performance? Let’s find out.

Many accessibility defects originate in design, so why do the bulk of accessibility considerations fall to developers and quality assurance? In this talk, we...