League of Extraordinary FoundryVTT Developers•3y ago

layers

TIL about CSS Layers. https://developer.mozilla.org/en-US/docs/Web/CSS/@layer

@layer utilities {
  /* creates a named layer called utilities. */
  .foo {
    padding: 5em;
  }
}

@layer utilities {
  /* creates a named layer called utilities. */
  .foo {
    padding: 5em;
  }
}

@layer - CSS: Cascading Style Sheets | MDN

The @layer CSS at-rule declares a cascade layer. Rules within a cascade layer cascade together, giving more control over the cascade to web developers.

25 Replies

Calego•3y ago

https://giphy.com/gifs/shrek-gif-layer-onion-KeDMt24sgiEuI

Giphy

Calego•3y ago

https://caniuse.com/?search=layers not super sure how to declare a layer in the DOM

Unknown User•3y ago

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Calego•3y ago

the mdn table is outdated, there's more support now

Unknown User•3y ago

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Calego•3y ago

I definitely don't understand these, how does an element know which layer to use? is this just for the specificity? Like I thought this was "this part of the app uses the 'dark' layer" but it looks like it's only here to help you with specificity

Unknown User•3y ago

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Calego•3y ago

Unknown User•3y ago

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Calego•3y ago

So the less specific p is applied after (thus taking precedence) the .box p because .box p is inside a layer. this feels... like it's only going to make this shit more confusing?

Unknown User•3y ago

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Calego•3y ago

imports are already a thing though just without the layer bit this is also already a thing, that's the normal cascade

Unknown User•3y ago

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Calego•3y ago

oh i didn't think that was a partial import, thought it put the whole file in as that layer you declare

Unknown User•3y ago

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Calego•3y ago

Unknown User•3y ago

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Calego•3y ago

https://www.bram.us/2021/09/15/the-future-of-css-cascade-layers-css-at-layer/

Bramus!

Bram.us

The Future of CSS: Cascade Layers (CSS @layer)

When authoring CSS we have to carefully think about how we write and structure our code. Cascade Layers (CSS @layer) aim to ease this task.

Unknown User•3y ago

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Calego•3y ago

that' swhat I thought initially, but it doesn't look like you can declare a layer as a specific DOM element, so you're back to normal CSS nesting for these. Except it seems like if you also declare a layer, the order of precedence doesn't follow specificity anymore. i.e. the layer order supersedes specificity I'm still not sure I'm getting it. You might be closer than I am. But this really doesn't look like it's going to be intutive to work with

Unknown User•3y ago

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Calego•3y ago

That would necessitate that you could say "alright this <main> element uses Layer dark", but that doesn't look possible

Unknown User•3y ago

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Calego•3y ago

It's not isolating stylesheets to different elements, which would be stupid useful in a lot of cases. It's like customizing the specificity cascade, which is ... not immediately useful to me (as someone who understands the cascade and uses a preprocessor for nesting).

Unknown User•3y ago

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