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Web Browser Engineering

It’s heavy on computer science, but this is a fascinating endeavour. It’s a work-in-progress book that not only describes how browsers work, but invites you to code along too. At the end, you get a minimum viable web browser (and more knowledge than you ever wanted about how browsers work).

As a black box, the browser is either magical or frustrating (depending on whether it is working correctly or not!). But that also make a browser a pretty unusual piece of software, with unique challenges, interesting algorithms, and clever optimizations. Browsers are worth studying for the pure pleasure of it.

See how the sausage is made and make your own sausage!

This book explains, building a basic but complete web browser, from networking to JavaScript, in a thousand lines of Python.

Google Is Testing Its Controversial New Ad Targeting Tech in Millions of Browsers. Here’s What We Know. | Electronic Frontier Foundation

Following on from the piece they ran called Google’s FLoC Is a Terrible Idea, the EFF now have the details of the origin trial and it’s even worse than what was originally planned.

I strongly encourage you to use a privacy-preserving browser like Firefox or Safari.

Compat2021: Eliminating five top compatibility pain points on the web

Good to see Google, Mozilla, and Apple collaborating on fixing cross-browser CSS compatability issues:

  1. flexbox
  2. grid
  3. position: sticky
  4. aspect-ratio
  5. transforms

You can track progress here.

Chromium Blog: A safer default for navigation: HTTPS

Just over a year ago, I pondered some default browser behaviours and how they might be updated.

The first one is happening: Chrome is going to assume https before checking for http.

Now what about the other default behaviour that’s almost 15 years old now? When might a viewport width value of device-width become the default?

prefers-reduced-motion: Taking a no-motion-first approach to animations

Given the widespread browser support for prefers-reduced-motion now, this approach makes a lot of sense.

Dropping Support For IE11 Is Progressive Enhancement · The Ethically-Trained Programmer

Any time or effort spent getting your JavaScript working in IE11 is wasted time that could be better spent making a better experience for users without JavaScript.

I agree with this approach.

With a few minor omissions and links, you can create a site that works great in modern browsers with ES6+ and acceptably in browsers without JavaScript. This approach is more sustainable for teams without the resources for extensive QA, and more beneficial to users of nonstandard browsers. Trying to recreate functionality that already works in modern browsers in IE11 is thankless work that is doomed to neglect.

A Live Interview With Rachel Andrew and Jeremy Keith on Vimeo

I really enjoyed this 20 minute chat with Eric and Rachel all about web standards, browsers, HTML and CSS.

The Performance Inequality Gap, 2021 - Infrequently Noted

Developers, particularly in Silicon Valley firms, are definitionally wealthy and enfranchised by world-historical standards. Like upper classes of yore, comfort (“DX”) comes with courtiers happy to declare how important comfort must surely be. It’s bunk, or at least most of it is.

As frontenders, our task is to make services that work well for all, not just the wealthy. If improvements in our tools or our comfort actually deliver improvements in that direction, so much the better. But we must never forget that measurable improvement for users is the yardstick.

Progressive enhancement and accessibility redux - QuirksBlog

This is a really interesting take on the intersection between accessibility and progressive enhancement (which I always felt was there, but this expresses it well):

Accessibility aims to optimize an experience across a spectrum of user capabilities. Progressive enhancement aims to optimize an experience across a spectrum of user agent capabilities.

Indeed, if you broaden the definition of “user agent” to include a user’s physiology, I think the concepts become nearly identical.

Imagining native skip links | Kitty Giraudel

I like this proposal, and I like that it’s polyfillable (which is a perfectly cromulent word).

How Web Components Are Used at GitHub and Salesforce – The New Stack

I’m very taken with Github’s tab-container element—this is exactly how I think web components should be designed!

The web is something different - daverupert.com

The web is so much bigger than the little boxes we try to put it in. The web is good at many things and not great (yet) at others. The web is a snowball rolling down hill, absorbing other technologies along the way. The web is an interactive window across space and time, a near instant connection to anyone on the planet. The web is something different. I wish we’d see the web more for itself, not defined by its nearest neighbor or navel-gazing over some hypothetical pathway we could have gone down decades ago.

Introducing State Partitioning - Mozilla Hacks - the Web developer blog

This is a terrific approach to tackling cross-site surveillance. I’d love it to be implemented in all browsers. I can imagine Safari implementing this. Chrome …we’ll see.

supercookie • workwise

Favicons are snitches.

WorldBrain’s Memex

A browser extension for bookmarking and annotation.

I like the name.

The unreasonable effectiveness of simple HTML – Terence Eden’s Blog

I love the story that Terence relates here. It reminds me of all the fantastic work that Anna did documenting game console browsers.

Are you developing public services? Or a system that people might access when they’re in desperate need of help? Plain HTML works. A small bit of simple CSS will make look decent. JavaScript is probably unnecessary – but can be used to progressively enhance stuff.

HTML Video Sources Should Be Responsive | Filament Group, Inc.

Removing media support from HTML video was a mistake.

Damn right! It was basically Hixie throwing a strop, trying to sabotage responsive images. Considering how hard it is usually to remove a shipped feature from browsers, it’s bizarre that a good working feature was pulled out of production.

Should The Web Expose Hardware Capabilities? — Smashing Magazine

This is a very thoughtful and measured response to Alex’s post Platform Adjacency Theory.

Unlike Alex, the author doesn’t fire off cheap shots.

Also, I’m really intrigued by the idea of certificate authorities for hardware APIs.