Je suis convaincu que la formation dans les technologies Web de base souffre de lacunes évidentes qui ont conduit à cet état des choses. Cette connaissance essentielle d’HTTP, HTML et CSS fait défaut. Or la réponse à cet engorgement réside dans ce savoir… Il est la clef pour apprendre à se passer de JavaScript.

Already cached local assets like Google Fonts will no longer serve from cache again when loading from a 2nd site.

JavaScript is your behavior layer; the way to add interactivity to your sites, to provide a slick and delightful user experience, to make everything fast and easy and clean. But at some point everything changed: the tail started to wag the dog instead and development became Javascript-first. We'll talk about how you maybe shouldn't rely on JS as much as you're told to, and some practical strategies for how to build sites without reaching for a JS framework as first, last, and only tool for making the web happen.

It is great to see Google create a new Page Experience signal using a brilliant object-oriented approach. I think it is smart, flexible, and scalable. That said, in my opinion, the signal must have teeth in order for it to be taken seriously by site owners, developers, and SEOs. If not, it can fall by the wayside.

Being able to run Google’s Lighthouse analysis suite programmatically provides a lot of advantages, especially for larger or more complex web applications. Using Lighthouse programmatically allows engineers to set up quality monitoring for sites that need more customization than straightforward applications of Lighthouse (such as Lighthouse CI) allow.

Have you ever looked at the Network Panel in DevTools, or a waterfall in WebPageTest and wondered what determines the order of the resources, and how you can influence it?

A great way to get a RUM overview of a page’s performance, at low cost, very quickly.

We need an alternative to JPEG that a) is widely supported, b) has better compression efficiency and c) has a wider feature set. We believe AV1 Image File Format (AVIF) has the potential. Using the framework we have open sourced, AVIF compression efficiency can be seen at work and compared against a whole range of image codecs that came before it.

I was a initially sceptical of AVIF – I don't like the idea that the web has to pick up the scraps left by video formats. But wow, I'm seriously impressed with the results above.