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Tracks
JavaScript
Closures, the event loop, this, promises, prototypes, plus coding problems and polyfills you can run and test in the browser.
TypeScript
Types vs interfaces, any vs unknown, utility types and typing React components.
React
Core concepts, hooks, Redux, performance and data fetching, plus machine coding questions with a live preview.
Next.js
Rendering strategies, hydration, the App Router, routing, API routes and SEO.
System design & behavioural
Frontend architecture, microfrontends, debugging at scale, and questions about your projects and how you work.
HTML & CSS
Semantic HTML, accessibility, the cascade, Flexbox and Grid, and responsive design, plus layout challenges with a live preview.