Learn when to use layout, shared elements, exit animations, and directional variants in React, with examples that account for keys, reduced motion, and rendering costs.

Follow JavaScript through V8 parsing, bytecode, and JIT tiers, then reproduce a deoptimization trace in Node.js without mistaking it for a benchmark.

A practical AI-assisted frontend workflow: define the change, test edge cases, inspect the generated code, and review accessibility, security, and the final diff.

See why Vite feels fast during development, inspect a lazy module in DevTools, and decide when its build workflow fits your app.

Design an accessible signup card without flattening its visual identity. Work through measured contrast, keyboard focus, reduced motion, reflow, and state-by-state review.
