Numérique Responsable

The French Council of State, the French Customs, and until very recently, the French Presidency, are among at least 184 French public websites that use Google Analytics, illegally allowing the tran…

Achieve zero waste web design with these open source tools and tips.

Increase sustainability throughout the lifecycle of your technology.

A free, self-paced online course for professionals shaping tomorrow's technology. Join thousands globally, including people from top organizations such as Meta, Apple, Google, Amazon, Microsoft, and the United Nations.

There’s been a lot of hype about the metaverse in the past few months since Facebook rebranded its parent company as Meta and announced that it was becoming a metaverse company. When I’m giving presentations about the future of the internet and sustainability these days, the metaverse is increasingly a topic that the audience wants […]

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Tools like Google Tag Manager and Adobe Tag Manager offer wonderful capabilities, but they can be detrimental to user experience

Why lazy loadable components can cause CLS on slower connections and how to prevent it.

As we think about ways in which government sites meet the needs of their users, speed is an integral part of what makes a site inclusive and accessible to more people.

Steve Souders had a great blog post last year that talked about Frontend Single Points Of Failure (SPOF).  Given the continuing rise in 3rd...

Great performance is key for great UX. We’ve told you how to tackle the low-hanging fruit: optimizing images for faster page loads. Now it’s time to fight the boss: JavaScript. Check out our handy guide!

Ecodesign audit for websites and web applications regarding Sustainable IT and Green IT compliance. This audit is based on GR491, handbook of sustainable design of digital services published by INR, European Institute for Sustainable IT.

What happens when you turn off all of your Internet advertising? Apparently, nothing. This post explores how I came to the decision to turn off all ads, and what I found as a result.

The Fetch Priority API indicates the relative priority of resources to the browser. It can enable optimal loading and improve Core Web Vitals.

Are you considering email accessibility for every campaign you send? Find out why accessible emails matter in this comprehensive guide.

The average energy consumption for one single Bitcoin transaction in 2023 could equal several hundreds of thousands of VISA card transactions.

Découvrez et adoptez des réflexes simples d’écoconception pour optimiser votre site internet et réduire son empreinte environnementale.

An open-source privacy audit of popular web browsers.

The accessibility acceptance criteria testing checklist generator by T-Mobile - Accessibility Resource Center

Images are the most popular resource type. The tendency is that more and more images are used on websites, and hence they are becoming heavier.

Measure accessibility at enterprise (or any) scale

Web performance is critical to inclusive design - users on low-end devices or with poor connectivity are excluded from large and slow applications

Crazed developer attempts real ecommerce without front-end JavaScript to prove that y’all playin’

Contexte Temesis milite depuis de nombreuses années (plus de 20 ans) pour un numérique responsable. C’est pourquoi il nous semble tout à fait naturel et nécessaire d’évaluer les sites web des …

Keep your network transmission and parse/compile cost for JavaScript low to ensure pages get interactive quickly.

Performance budgets are an essential but under-appreciated part of product success and team health. Most partners we work with are not aware of the real-world operating environment and make inappropriate technology choices as a result. We set a time budget of less than 5 seconds first-load Time-to-Interactive and less than two seconds for subsequent loads. We further constrain ourselves to a baseline device and network configuration to measure progress. 2017's global baseline is a ~$200 Android device on a 400Kbps link with a 400ms round-trip-time ('RTT'). This translates to ~130-170KB of critical-path resources, depending on composition; the more JS you include, the smaller the bundle must be.