When implementing Content Security Policy (CSP) protections, always explicitly pass nonce values to components rather than auto-applying them. This gives developers more control over security aspects and prevents potential security bypasses when integrating components from different sources. Key implementation guidelines: - Pass nonces explicitly to components that need them (like style and script elements) - Be aware that different content types may require different nonce values (`style-src` and `script-src` directives) - Ensure elements with different nonces aren't inappropriately merged - Handle nonces consistently across your application Example in React: ```javascript // Correct: Explicitly passing nonce to style elements // When rendering on server, pass nonce to the renderer renderToPipeableStream( , { nonce: CSPnonce } ); // For preinitialized styles, ensure nonces are added consistently // to maintain security guarantees const preinitOptions = { precedence: 'default', nonce: CSPnonce // Explicitly add nonce here too }; ``` Properly implemented CSP with nonces is one of the strongest defenses against cross-site scripting (XSS) attacks, but only if nonces are managed correctly and consistently throughout your application.