Frontend Fundamentals

A deep dive into the browser rendering pipeline, from HTML parsing through the critical rendering path to paint and composite.

Master Flexbox, CSS Grid, and modern layout features like container queries and :has() for responsive, maintainable interfaces.

Core JavaScript concepts: variables, functions, control flow, objects, arrays, scope, error handling, and modern ES6+ syntax every frontend developer needs.

Deep dive into the event loop, async patterns, prototypes, closures, functional programming, and JavaScript gotchas every senior developer should know.

Document structure, semantic elements, forms, media, links, accessibility basics, and SEO-friendly HTML practices for building solid web pages.

WCAG guidelines, ARIA attributes, accessible forms, focus management, screen reader testing, color contrast, anti-patterns, and automated a11y tools.

Introduction to React: JSX, components, props, state, events, conditional rendering, lists, and core hooks (useState, useEffect) for building UIs.

Custom hooks, compound components, render props vs hooks, memoization, Context patterns, Suspense, error boundaries, and React 19 Server/Client Components.

Master the core building blocks of CSS: selectors, the box model, specificity, units, colors, typography, positioning, and display—the foundation of web styling.

Understand Core Web Vitals, measuring tools, image optimization, caching, and critical rendering path—build faster, more responsive web applications.

Learn the testing pyramid, unit testing with Jest/Vitest, Testing Library for React, mocking, integration patterns, E2E with Cypress/Playwright, and TDD workflow.

Learn why TypeScript, basic types, interfaces vs types, unions and intersections, generics, type narrowing, utility types, and TypeScript with React.

Event loop, event delegation, bubbling and capture, target vs currentTarget, and how to work with the DOM and events in JavaScript.

Using fetch, async/await, error handling, loading states, and patterns for data loading in the browser.

Prepare for your frontend developer interview with essential concepts in HTML, CSS, React, and JavaScript, as demonstrated in a mock interview.