Security (XSS, CSRF, CSP)

Summary

The core web security threats every frontend developer should understand — Cross-Site Scripting, Cross-Site Request Forgery, and Content Security Policy as a key mitigation.

• 1Learn how XSS happens (unescaped user input rendered as HTML) and how React protects against it by default.
• 2Read how CSRF tokens prevent forged requests from other sites.
• 3Add a basic Content-Security-Policy header to a project and see what it blocks.