Component-based architecture, state management with hooks (useState, useEffect), routing with React Router, context management (Context API).
Semantic HTML, cross-browser compatibility, responsive design, Accessibility, Flexbox, Grid, Pixel Perfect.
ES6+, closures, asynchronous programming (Promise, async/await), DOM manipulation, API interactions.
Gulp, Vite, Parcel for task automation, resource optimization, and project bundling.
CSS, Less, Sass, Bootstrap, Tailwind, CSS Animations, GSAP Animations.
Git, GitHub, GitLab, Version control best practices.