I'm requesting a TAG review of Scoped Custom Element Registries.
This is a proposal allows for multiple custom element definitions for a single tag name to exist within a page. This is accomplished by allowing user code to create multiple custom element registries and associate them with shadow roots that function as scopes for element creation and custom element definitions. Potentially custom elements created within a scope use the registry for that scope to perform upgrades. Changes to Document, Element, ShadowRoot, and HTMLTemplateElement APIs provide the surface area of this feature.
OpenedMar 18, 2025
こんにちは TAG-さん!
I'm requesting a TAG review of Scoped Custom Element Registries.
This is a proposal allows for multiple custom element definitions for a single tag name to exist within a page. This is accomplished by allowing user code to create multiple custom element registries and associate them with shadow roots that function as scopes for element creation and custom element definitions. Potentially custom elements created within a scope use the registry for that scope to perform upgrades. Changes to Document, Element, ShadowRoot, and HTMLTemplateElement APIs provide the surface area of this feature.
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