Post

s/shipping more CSS/shipping less JS/ github.blog/engineering/...

CSS Modules?

It is the year of still haven’t found a good way to scale CSS

if only there were a way to say, cascade the styles

I should probably write a longer post about this, but the 300 char limit version is: there are many great things about the cascade, but it is also the main reason why CSS is hard to scale.

Do custom elements help?

That was a pain point, but native web has always been a pain point that catches up to userland. Now we have Declarative Shadow DOM (developer.mozilla.org/en-US/docs/W...) and <link rel="stylesheet"> to allow people to SSR custom elements with shared styles without increasing HTML payload size.

<link rel="stylesheet"> does cause styles to be duplicated in memory (not the payload), so a new standard that supports CSS Module Scripts will soon be normalized, which will share a single CSSStyleSheet instance across all roots that link it with <link> github.com/MicrosoftEdg...

The pull request for CSS Module Scripts in Safari is already approved by @rniwa.bsky.social.