[csswg-drafts] Pull Request: [cssom-1] Change CSSStyleSheetInit's `baseURL` type to nullable #12078

zeesuyeon has just submitted a new pull request for https://github.com/w3c/csswg-drafts:

== [cssom-1] Change CSSStyleSheetInit's `baseURL` type to nullable #12078 ==
This PR fixes: #12078

This PR updates the `baseURL` in CSSStyleSheetInit dictionary to be nullable to align with the default value null.

The previous definition used DOMString baseURL = null;, but in WebIDL, [DOMString](https://webidl.spec.whatwg.org/#idl-DOMString) is not nullable by default. To correctly support null as a default value, the type should be explicitly defined as `DOMString?`.

See https://github.com/w3c/csswg-drafts/pull/13546


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Received on Monday, 23 February 2026 07:24:28 UTC