Frontend Security, Taint APIs, and Web Accessibility

Frontend security and accessibility are non-negotiable hiring criteria at Apple, Google, Meta, and Airbnb. Candidates must understand how client-side vulnerabilities manifest and how to make interfaces accessible to assistive technologies.

Analyze XSS prevention in React, sanitize dynamic HTML with DOMPurify, learn how React 19 server taint APIs prevent secret leaks, and implement accessible keyboard navigation with roving tabindex and focus trapping for modal dialogs.