feat(core): support bootstrapping Angular components underneath shadow roots#66782

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dgp1130 wants to merge 11 commits intoangular:mainfrom

dgp1130:bootstrap-shadow-minimal

Commits on Mar 28, 2026

refactor(core): move `SharedStylesHost` interface into `@angular/core` with a dedicated `InjectionToken`
dgp1130
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refactor(core): add `getRootNode` to `RNode` interface
dgp1130
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refactor(core): track multiple usages of a single host in `SharedStylesHost`
dgp1130
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refactor(core): add `MockSharedStylesHost`
dgp1130
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fix(core): ensure `ViewRef.prototype.destroy` is idempotent
dgp1130
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feat(core): support bootstrapping Angular components underneath shadow roots
dgp1130
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refactor(platform-browser): avoid `SharedStylesHost` modifications after destruction
dgp1130
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refactor(core): preserve `document` context via `fallbackDocument` in `LViewEnvironment`
dgp1130
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refactor(platform-browser): avoid duplicate styles when re-adding a host in `SharedStylesHost`
dgp1130
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test: verify that Angular supports bootstrapping under shadow roots
dgp1130
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test(core): add test validating that component destroy does not depend on the injector
dgp1130
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