Frontend Interview Guide
Own the frontend loop from fundamentals to system design — JavaScript/TypeScript deep-dives, React patterns, CSS challenges, web-performance questions, and frontend architecture.
📁 File Structure 14 files
├── LICENSE
├── README.md
├── free-sample.zip
├── guide/
│ ├── 01-overview.md
│ ├── 02-javascript-and-typescript-core-concepts.md
│ ├── 03-react-performance-patterns.md
├── index.html
├── interactive.html
├── questions/
│ ├── css-and-layout.md
│ ├── frontend-system-design.md
│ ├── javascript-fundamentals.md
│ ├── react-patterns.md
│ ├── web-performance.md
├── study-plan/
│ ├── frontend-study-plan.md
📖 Documentation Preview README excerpt
Frontend Interview Guide
110+ frontend interview questions with thorough answers, code examples, and difficulty ratings — covering JavaScript/TypeScript fundamentals, React patterns, CSS & layout, web performance, and frontend system design.
Whether you're prepping for your first mid-level frontend role or aiming for a senior position at a top tech company, this guide gives you the technical depth interviewers actually test — not surface-level definitions you could find on a blog.
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Table of Contents
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What's Included
| Category | Count | Description |
|---|---|---|
| **JavaScript & TypeScript Fundamentals** | 22 | Closures, event loop, promises, prototypes, `this`, hoisting, TypeScript generics & utility types |
| **React Patterns** | 22 | Hooks, reconciliation, state management, performance optimization, compound components, error boundaries |
| **CSS & Layout** | 22 | Box model, flexbox, grid, specificity, responsive design, stacking contexts, modern CSS features |
| **Web Performance** | 22 | Core Web Vitals, code splitting, caching, rendering pipeline, image optimization, profiling |
| **Frontend System Design** | 22 | Component architecture, design systems, data fetching, accessibility, full design walkthroughs |
| **Study Plan** | 1 | 3-week structured prep plan with daily topics referencing the actual question files |
| **Total questions** | 110 | Every question includes a detailed answer, difficulty rating, key points, and many include follow-ups |
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How to Use This Guide
For Interview Prep (recommended)
1. Start with the study plan (study-plan/frontend-study-plan.md) — it maps out a 3-week daily schedule
2. Work through topic files in order — JavaScript fundamentals first, then React, CSS, performance, and system design
3. Try answering each question yourself before reading the answer — active recall beats passive reading
4. Pay attention to follow-up questions — interviewers frequently dig deeper on the same topic
For Quick Reference
For Mock Interviews
1. Have a friend pick 5-6 random questions across different files
2. Answer each question aloud as if in a real interview (2-3 minutes per question)
3. Check your answer against the guide
4. Focus your remaining study time on topics where you struggled
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Recommended Study Order
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📅 Changelog
v1.0.0 — Initial release.
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