layer()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2022.

The layer() CSS function is used along with the @import at-rule to put the imported resource in a separate named cascade layer.

Syntax

@import url layer(layer-name);
@import "dark.css" layer(framework.themes.dark);

The framework.themes.dark is the layer into which the CSS file would be imported.

layer() = 
  layer( <layer-name> )  

<layer-name> = 
  <ident> [ '.' <ident> ]*

Specification
CSS Cascading and Inheritance Level 5 # ref-for-typedef-layer-name

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android
`layer_function`	99	99	97	85	15.4	99	97	68	15.4	18.0	99