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InterviewLane

The frontend interview prep platform built by engineers, for engineers.

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© 2026 InterviewLaneBuilt for senior frontend engineers
★
Stop grinding. Start interviewing.

Ace your frontend interview.
Without the grind.

Curated questions, structured roadmaps, and a clear path from refresher to ready. Practice. Reason. Ship.

Start practicingView roadmaps
778
curated questions
18
categories
75
Blind 75 roadmap
Categories

Practice what they ask, not what's trendy.

Every interview surface, drilled into focused questions with depth and trade-offs.

Frontend340 questions

Cross-cutting frontend questions covering modern best practices.

React161 questions

Hooks, Fiber, concurrent rendering, hydration, and performance.

DSA & Algorithms75 questions

75 hand-picked, priority-ranked LeetCode problems. Arrays, graphs, trees, DP, and more

JavaScript72 questions

Closures, async, prototypes, modules, and language internals.

Performance60 questions

Bundle size, Core Web Vitals, virtualization, caching.

CSS31 questions

Layout, specificity, animations, modern Grid/Flex.

System Design25 questions

Frontend architecture for scale, micro-frontends, modular apps.

Browser Internals22 questions

Event loop, V8, GC, rendering pipeline, paint and layout.

Browse all categories
BLIND 75 · FRONTEND

A roadmap that feels like progress, not homework.

Three phases, ten skills, a clear finish line. Each node unlocks when you've internalized the last.

Open roadmap
Easy
Warm-up
100%
  • Closures & scope
  • Array methods
  • Promise basics
  • CSS specificity
  • DOM APIs
Medium
Core
62%
  • Debounce / throttle
  • useReducer patterns
  • Event delegation
  • Reflow vs repaint
  • Type narrowing
Hard
Senior
14%
  • Virtualization
  • Custom renderer
  • Memoization tradeoffs
  • Concurrent UI
  • Frontend system design
Trending this week

Questions other engineers are practicing.

The highest-frequency questions across senior frontend interviews.

01
Build a custom hook that handles loading, error, and success states
Medium
react
~7m
02
Build an autocomplete / typeahead component
Medium
machine coding
~8m
03
Context vs Redux vs Zustand — when to use what?
Medium
react
~7m
04
Cookies vs localStorage vs sessionStorage — when to use each?
Easy
browser internals
~6m
05
Debounce vs throttle — implement both
Medium
javascript
~6m
Daily challenge
Build a streak

== vs === — what does coercion actually do?

=== compares value + type; == coerces the operands following a fixed algorithm before comparing. Always use === except for one defensible idiom: `x == null` to check for null OR undefined.

Easy
~8 min·Reset daily at 00:00 UTC
Take the challenge Random round
Shortcuts
Random Interview Mode

Five questions sampled across categories — simulate a 60-minute round.

7 / 30 / 90-day plans

Structured paths from refresher to deep prep, day-by-day.

Your next interview is closer than you think.

Start today. Skip the grind. Walk in confident.

Start practicing View roadmaps