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+---
+'astro': minor
+---
+
+Added `Polymorphic` type helper to `astro/types` to easily create polymorphic components:
+
+```astro
+---
+import { HTMLTag, Polymorphic } from 'astro/types';
+
+type Props<Tag extends HTMLTag> = Polymorphic<{ as: Tag }>;
+
+const { as: Tag, ...props } = Astro.props;
+---
+
+<Tag {...props} />
+```