What are the best practices for implementing CSP in React applications?
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What are the best practices for implementing CSP in React applications?
When implementing Content Security Policy (CSP) in React, consider these best practices: 1. Use nonce-based CSP for inline scripts. 2. Avoid 'unsafe-inline' and 'unsafe-eval'. 3. Specify trusted sources for scripts and styles. 4. Regularly review and update your CSP as your app evolves.
Can you explain what nonce-based CSP is?
Nonce-based CSP allows you to specify a unique token (nonce) for each script tag, enabling inline scripts while maintaining security. This way, only scripts with the correct nonce will execute.
What should I do if I need to use third-party scripts?
For third-party scripts, you can specify their sources in your CSP using the 'script-src' directive. Make sure to only allow trusted domains and consider using Subresource Integrity (SRI) to ensure the scripts haven't been tampered with.
How can I test my CSP implementation?
You can test your CSP implementation using browser developer tools. Look for CSP violations in the console, and use tools like CSP Evaluator to analyze your policy for potential weaknesses.
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