Here's a summary roadmap to become an expert frontend developer:

1. Master the basics → HTML (semantic, accessible), CSS (Flexbox, Grid, responsive, animations), JavaScript (ES6+, DOM, async/await).
2. Understand web core concepts → browser rendering, performance optimization, accessibility (a11y), security (XSS, CSRF, CORS).
3. Deep dive into a framework → React (with Next.js) or Vue/Angular. Learn meta-frameworks.
4. Styling systems → Tailwind CSS, component libraries, design systems.
5. Tooling → Git, npm/pnpm, Vite/Webpack, ESLint, Prettier, testing (Jest, Cypress).
6. Advanced topics → TypeScript, state management (Redux/Zustand), SSR/SSG, GraphQL/tRPC, micro-frontends.
7. Soft skills → communication, problem-solving, clean code, teamwork, mentoring.
8. Build projects → real-world clones, dashboards, SaaS apps, deploy & document them.