#frontend

React typeahead with async suggestions and keyboard navigation
CodingxAI
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Render nested JSON in a code-style viewer
CodingxAI
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React list loaded with useEffect
CodingxAI
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React Battleship board
CodingWaymo
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Debug an Angular UI from user reports
CodingWaymo
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Filter an n-ary tree by substring and render it indented
CodingWaymo
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Autocomplete search bar with a hand-written debounce
CodingWaymo
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Parking lot manager in React
CodingUber
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Collapsible JSON viewer in React
CodingNotion
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Design a real-time comment feed with optimistic updates
System designCohere
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Credit card form with validation and linked fields
CodingCohere
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React hook for API data and UI changes in a starter app
CodingScale AI
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React social feed with voting, re-sorting and pinned posts
CodingGlean
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Virtualized spreadsheet grid in React with cell formulas
CodingHarvey
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React class components, lifecycle methods and hooks
CodingSnowflake
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Implement an event emitter
CodingSnowflake
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Arrow-key controlled kanban board in React
CodingSnowflake
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Design calendar front-end state for recurring events
System designSnowflake
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Technical recruiter screen: duplicate requests and a streaming chat UI
System designOpenAI
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Build a chat input that renders a streamed AI reply
CodingOpenAI
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Paginated, sortable React table
CodingMeta
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Find bugs and slow renders in a React app
CodingMeta
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Design an embeddable streaming chat interface
AI systemGoogle
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Render more than 100 million points on a map
System designGoogle
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Passport number form with per-country formats
CodingStripe
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Searchable transaction list that highlights the largest
CodingStripe
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Build a React interface against an undocumented API
CodingStripe
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Autocomplete data fetching with debounce, retry and caching
CodingDatabricks
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Build a booking widget with live pricing
CodingAirbnb
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React fundamentals and error handling
CodingApple
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Diagnose a slow cold load and a huge table in a web app
CodingApple
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JavaScript scope, closures, timers and the event loop
CodingApple
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Accessible expand-and-collapse tree in React
CodingApple
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Design the front end of a desktop AI chat app
System designAnthropic
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Debounce and throttle in JavaScript
CodingAmazon
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Reusable dialog component
CodingAmazon
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Responsive grid of fixed-size boxes
CodingAmazon
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Accessible popovers that load data
CodingAmazon
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JavaScript let versus var
CodingAmazon
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Autocomplete product search box
CodingAmazon
▲ 00 solutions
Infinite-scroll news feed in TypeScript
CodingMediumPerplexity
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Build a driving-log replay viewer with an AI assistant
CodingHardApplied Intuition
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