Web Reference: Oct 14, 2021 · I am currently migrating a Next.js project from JavaScript to TypeScript, and I've run into an error: Property 'className' does not exist on type '{ props: ReactNode; }'. Jan 16, 2026 · In this guide, we’ll demystify why this error happens and walk through step-by-step solutions to correctly type className in custom React components. Whether you’re building a simple button or a complex wrapper component, you’ll learn how to ensure TypeScript recognizes className and avoid type errors for good. Sep 25, 2023 · I temporarily resolved the issue by removing the className from both the props and the sheetPrimitive.portal component. Although this solution has worked for now, I am uncertain if it might cause problems in the future.
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How to Fix: Invalid DOM Property class. Did you mean ClassName? Information
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Invalid DOM property `class`. Did you mean `className`? Information
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Last Updated: April 3, 2026

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How to fix error  - The name 'Title' does not exist in the current context Details
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