Have you ever dealt with application, code, or service security?

Yes, security of frontend applications is an important aspect of development. In my practice, I paid attention to the following points:

• Validation and sanitization of user input to prevent XSS attacks.
• Using Content Security Policy (CSP) to restrict the loading of unsafe scripts.
• Protection against CSRF through tokens and proper CORS configuration.
• Minimizing the disclosure of sensitive information in errors and logs.
• Updating dependencies to fix known vulnerabilities.
• Using HTTPS to protect data during transmission.

For example, when working with forms, I always check and sanitize data both on the client and server sides to prevent malicious code injection.