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Learn when to use DOMPurify versus manual validation for input sanitization. Real-world examples comparing DOM-based sanitization with regex and custom validation approaches.

Learn how to implement Content Security Policy in your JavaScript applications to prevent XSS attacks and secure your code. Practical examples with nonces, hashes, and framework-specific patterns.

Learn when your Node.js API actually needs CSRF protection and how to implement it correctly. Real-world examples of synchronizer tokens, custom middleware, and authentication patterns that work.