Everything you need for frontend interviews — from DSA to DOM to system design.
Curated arrays, strings, trees, graphs — focused on patterns used in frontend interviews, with JS-first solutions.
Event emitter, debounce/throttle, promise polyfills, closures, event loop, async patterns.
Nested checkboxes, file explorer, infinite scroll, accessibility-focused components.
News feed, Google Docs, ecommerce, autocomplete, dashboards, component libraries, performance & scalability tradeoffs.
Rendering pipeline, HTTP, caching, performance & memory, security, accessibility.
Problems and concepts are selected based on how frontend interviews actually evaluate engineers.
No generic DSA. No backend-heavy focus. Just frontend-specific depth, tradeoffs, and real constraints.
Problems and concepts are selected based on how frontend interviews actually evaluate candidates — not generic DSA patterns or backend-heavy questions.
Practice closures, async behavior, execution flow, and edge cases that interviewers probe for depth — not memorized syntax or trick questions.
Build components like file explorers, autocomplete, nested trees, and complex forms — the same UI patterns commonly asked in frontend interviews.
Design UI-heavy systems such as feeds, dashboards, and component libraries, focusing on tradeoffs, constraints, and scalability from a frontend perspective.
Reason about rendering, performance bottlenecks, memory, and browser APIs — areas that often differentiate strong frontend candidates.
Built to reflect how frontend interviews actually work — not how tutorials teach.
Since you have breadth, we guide you. Each path → curated problems, not everything at once.
Start your journey with foundational frontend concepts and simple problems. Best if you have 0–1 years experience or are self-taught.
The most common path. Covers frontend DSA, JS internals, and UI patterns asked in interviews.
Master advanced system design and architecture for senior-level roles. Designed for senior IC and staff-level frontend roles.
From DOM manipulation to complex React patterns, master every aspect of frontend development with our comprehensive platform.
VS Code-powered editor with IntelliSense, syntax highlighting, and vim mode support.
Real-time test results with detailed explanations and performance metrics.
See your React components and CSS changes render instantly as you type.
Compete globally, build streaks, and earn achievements to showcase your skills.
Learn from thousands of solutions and discuss approaches with other developers.
Get contextual hints powered by AI when you're stuck without spoiling the solution.
Learn from the mistakes that trip up even experienced developers. Master these patterns and you'll stand out in every interview.
Interviewers want to see your thought process, not just correct code
Practice explaining your approach out loud before coding
Shows lack of senior-level communication skills
Always ask clarifying questions about edge cases and constraints
Senior roles require understanding when to use what and why
Learn to compare time/space complexity, maintainability, and scalability
Frontend engineers must optimize for real users, not just pass tests
Master rendering strategies, bundle optimization, and Core Web Vitals
Production code requires defensive programming
Always consider null, undefined, empty arrays, and network failures
Shows you're not keeping up with the ecosystem
Stay current with React patterns, TypeScript, and modern JavaScript
Join thousands of developers who've landed their dream jobs.
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“Best platform for frontend prep. The CSS challenges alone are worth the subscription.”
“I recommend FrontendInterviews.dev to everyone on my team. It's LeetCode but for UI engineers.”
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