[csswg-drafts] [cssom] allow text in CSSStyleSheet constructor (#12110)

jonathantneal has just created a new issue for https://github.com/w3c/csswg-drafts:

== [cssom] allow text in CSSStyleSheet constructor ==
May we consider allowing [CSSStyleSheetInit](https://drafts.csswg.org/cssom/#dictdef-cssstylesheetinit) to accept a text property that synchronously assigns rules to the constructed sheet?

```idl
dictionary CSSStyleSheetInit {
  DOMString baseURL = null;
  (MediaList or DOMString) media = "";
  boolean disabled = false;
  DOMString text = "";
};
```

Example usage:
```js
new CSSStyleSheet(":host{ /* styles */ }")
```

Example in `adoptedStyleSheets`:
```js
shadowRoot.adoptedStyleSheets = [ new CSSStyleSheet(":host { /* styles */ }") ]
```

The goal is to improve the authoring experience for constructed stylesheets, especially within custom elements, by enabling inline creation without needing to call `replaceSync()` separately. This would be a small but meaningful ergonomic improvement and a low-barrier enhancement that could benefit many developers working with `adoptedStyleSheets`.

Would this be appropriate for inclusion in the spec, or is it better suited for discussion elsewhere?

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/12110 using your GitHub account


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Received on Tuesday, 22 April 2025 21:06:30 UTC