--- title: "Typed Polymorphic React Component" url: https://daily.dev/posts/typed-polymorphic-react-component-qwqrzo59w source_url: https://kittygiraudel.com/2026/06/19/typed-polymorphic-react-component type: article source: "Kitty says hi." author: "Kitty Giraudel" published: 2026-06-19T13:39:40.484Z updated: 2026-06-20T10:00:10.592Z tags: ["react", "typescript", "design-systems"] reading_time: 4 upvotes: 67 comments: 1 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Typed Polymorphic React Component **[Kitty says hi.](https://daily.dev/sources/kittygiraudel)** · [@kittygiraudel](https://daily.dev/kittygiraudel) · 4 min read · 67 upvotes · 1 comments ## Summary A practical walkthrough of building a typed polymorphic React component using TypeScript generics. The author explores why a naive intersection type approach fails to narrow props correctly, discovers that wrapping ComponentProps in a mapped type (or using Omit with any key) forces TypeScript to materialize the generic after inference, and arrives at a working implementation where the allowed props are strictly determined by the value of the `as` prop. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#react](https://daily.dev/tags/react), [#typescript](https://daily.dev/tags/typescript), [#design-systems](https://daily.dev/tags/design-systems) [View this post on daily.dev](https://daily.dev/posts/typed-polymorphic-react-component-qwqrzo59w)