Why do people prefer it over CSS modules? They also solve the style containment problem, and do not require any effort to set up, or any additional library to learn?

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troupo 18 hours ago | parent [-]

You're probably confusing something with something?

CSS Modules are a JS-only third party solution re-invented/re-implemented in a dozen different ways for various JS frontend frameworks. Requires setting up, requires learning an additional library.

If you mean these CSS modules: https://github.com/css-modules/css-modules?tab=readme-ov-fil... then they need to be supported by whatever build chain you use. And you literally need to use them slightly different than normal CSS. E.g. for Vite yuo need to have `.module.css` extension. And they often rely on additional libraries to learn. E.g. you can enable Lightning CSS with aforementioned Vite which comes with its own CSS flavour: https://lightningcss.dev/css-modules.html

If you mean CSS import attributes, they only appeared in 2024 in Chrome and Firefox, early 2025 in mobile Android etc. and they don't provide magical local scoping out of the box: https://caniuse.com/wf-css-modules

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azangru 17 hours ago | parent | next [-]

I meant the CSS modules that are implemented by a build tool. And yes, mea culpa, they are probably a js-only solution, requiring a build tool to correctly interpret a css import (.module.css in the file name is a common convention; but it is tweakable), and the author to use the imported object instead of plain strings, when referring to the class names. But I don't know if having to write `class="styles.foo"` as opposed to `class="foo"` counts as learning. And apart from that, there isn't anything else to learn.

But, given that one would need build tools for tailwind as well, the requirement for build tools couldn't have played a role in the choice between the two.

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owebmaster 18 hours ago | parent | prev | next [-]

Well no, none of them ?

This is what OP was talking about:

https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Nest...

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troupo 9 hours ago | parent [-]

No, he's not: https://news.ycombinator.com/item?id=46570846

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owebmaster 5 hours ago | parent [-]

Ignore it then, CSS nesting and layers are the real deal

	▲	troupo 3 hours ago \| parent [-]
		Nesting is the bee's knees. I still don't understand what layering is, and why you would use it.

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gedy 17 hours ago | parent | prev [-]

> CSS Modules are a JS-only third party solution re-invented/re-implemented in a dozen different ways for various JS frontend frameworks. Requires setting up, requires learning an additional library.

I mean, Tailwind is not that different here - you must use a build tool to tree shake the styles, etc.