Baseline Widely available
The read-only layerName property of the CSSImportRule interface returns the name of the cascade layer created by the @import at-rule.
If the created layer is anonymous, the string is empty (""), if no layer has been created, it is the null object.
A string, that can be empty, or the null object.
The document's single stylesheet contains three @import rules. The first declaration imports a stylesheet into a named layer. The second declaration imports a stylesheet into an anonymous layer. The third declaration imports a stylesheet without a layer declaration.
The layerName property returns the name of the layer associated with the imported stylesheet.
@import "style1.css" layer(layer-1);
@import "style2.css" layer;
@import "style3.css";
const myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].layerName); // returns `"layer-1"`
console.log(myRules[1].layerName); // returns `""` (an anonymous layer)
console.log(myRules[2].layerName); // returns `null`
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HTML:
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UTF-8
| Version:
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