Jekyll2026-09-09T04:16:56+00:00https://rixx.github.io/baseline-updates/feed/by_tag/dom.xmlBaseline UpdatesUpdates to the Baseline collection. Including RSS feeds (both for all updates and individual tags).New in High Baseline Support: Declarative shadow DOM2026-08-20T00:00:00+00:002026-08-20T00:00:00+00:00https://rixx.github.io/baseline-updates/2026/08/20/declarative-shadow-domcaniuse · mdn · spec

The shadowrootmode attribute on <template> creates a shadow root without the use of JavaScript. It is a declarative alternative to the attachShadow() method.

Source features

  • api.HTMLTemplateElement.shadowRootMode [mdn]
  • html.elements.template.shadowrootmode [mdn]
  • html.elements.template.shadowrootdelegatesfocus [mdn]
  • html.elements.template.shadowrootclonable [mdn]
  • api.HTMLTemplateElement.shadowRootDelegatesFocus [mdn]
  • api.HTMLTemplateElement.shadowRootClonable [mdn]
  • api.HTMLTemplateElement.shadowRootSerializable [mdn]
  • html.elements.template.shadowrootserializable [mdn]
  • api.HTMLTemplateElement.shadowRootSlotAssignment [mdn]
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