compiled VS PostCSS

tags inside SFCs are typically injected as native </code> tags during development to support hot updates. <strong>For production they can be extracted and merged into a single CSS file.</strong></p> </blockquote> <p>There are also 3rd party CSS libs that do the same thing such as <a href="https://linaria.dev/">linaria</a>, <a href="https://vanilla-extract.style/">vanilla-extract</a>, and <a href="https://compiledcssinjs.com/">compiled CSS</a>. Which can be used in the event you're stuck with something that doesn't have baked in support via SFC formats (looking at you React).</p> <p>These are my preferred ways of handing it.</p> <ol> <li>Tailwind</li> </ol> <p>Option 2 is tailwind, which works backwards.</p> <p>That is, instead of the above with extraction where you write the styles, and the framework or libs extract them and replace them with class names, it's the other way around.</p> <p>You're writing class names first (which are essentially aggregated CSS property-values) which then generate and/or reference styles.</p> <p>It has the advantage of being easy to write (assuming you've got editor LSP, linting, etc), but as you've discovered, it's difficult to read / can get really messy really fast.</p> <p>As far as all the other claims on the Tailwind site, it's all marketing, at least 80% bullshit.</p> </div>

Your choice of CSS lib. Bootstrap can still be a valid choice, tho you may want to check the docs of whatever SSR / SSG framework you end up using as they may have better (or worse support). For example if you wanted to do CSS-in-JS (Next) i'd consider Linaria, vanilla-extract, or compiled.

So to be extremely clear, the issue isn't CSS-in-JS per se, it's just that the author only looked at implementations that don't generate create CSS files. He notably mentioned the (apparent) zero-runtime solutions Vanilla Extract and Linaria, only to skip them and complain that Compiled inserts nodes at runtime.

Compiled

Link: https://compiledcssinjs.com/

Compiled (Compile time CSS-in-JS solution from Atlassian)

Stitches Is near zero runtime and vanilla-extract claims it's zero runtime and typed. There's atlassian compiled as well but I never used it.

Author here, I haven't had time to play around with it, but this library[0] from Atlassian looks like a "best of the both worlds" styling approach: CSS-in-JS authorship without the runtime penalty.

[0] https://compiledcssinjs.com/

the plugins in the official PostCSS website were old like IE6 or the marquee tag, and

Hello internet. I just published a new blog post on how to implement dark mode with SvelteKit, optionally with PostCSS and TailwindCSS:

There are many frontend tools available for this purpose. For example, PostCSS is a popular CSS processor that can combine and minimize your code. With the right plugin, it can even fix your code for compatibility issues, making sure your CSS styles work for all browsers.

I use PostCSS to extend CSS’s features and to add a few things that make writing styles a little more convenient, but it could easily be swapped for another preprocessor like Sass or vanilla CSS. It’s up to you. You can view my PostCSS config here.

Code transpilation isn't specific to JavaScript, You can also add a level of transformation to your CSS source using tools like post-css. Most languages with a fairly mature ecosystem will probably have some tools to help with code transformation.

In large projects, it is still a good idea to use PostCSS, which will translate new CSS features to something that browsers understand today.

LiveCodes provides many of the commonly used developer tools. These include Monaco editor (that powers VS Code), Prettier, Emmet, Vim/Emacs modes, Babel, TypeScript, SCSS, Less, PostCSS, Jest and Testing Library, among others. All these tools run seamlessly in the browser without any installations or configurations. It feels like a very light-weight version of your own local development environment including the keyboard shortcuts, IntelliSense and code navigation features.

Usually, one of the first things I do on creating a new web app is to throw a UI library in to help style components. There are several UI libraries that can be used by Svelte, but in this case I went with daisyUI because it's a fairly popular UI library which includes tailwind. To install daisyUI, you first need to install tailwind. There's a few different ways to do this (such as this guide), but the easiest way I've found is the following command, which also adds PostCSS and AutoPrefixer:

Vanilla CSS has taken a similar path with ambitious working drafts, better browser support, and PostCSS to fill the gap for user agents lagging behind. So why is Sass/SCSS still so popular? Maybe we go so used to it that we might have forgotten what problems it was meant to solve in the first place.