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React Coding Challenges

Practice React online with real coding challenges and practice problems. Every one is checked by a hidden test suite that mounts and interacts with your component, not a static answer key. Filter by topic, difficulty or company, start with the free react coding challenges, and unlock the rest by Upgrading to Pro. Want to try an idea first? Use the online React compiler or read our React interview questions.

Status

Difficulty

BeginnerIntermediateAdvancedFAANG

Topic

DebuggingHooks & StateCustom HooksMini AppsPerformanceContext & PatternsForms & EventsFAANG Interview Set

Title

Topic

Difficulty

Solve

Controlled text input

Toggle theme provider

useDebounce Custom Hook

usePrevious Hook — Track Previous Value

useInterval with pause

Modal with focus trap

Tabs with compound components

Stop wasteful list re-renders

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FAQ

React coding challenges - frequently asked questions

You can practice React online right here. Pick a challenge, write your solution in the browser, and run the hidden tests to see what passes. Start with the free challenges; some are marked PRO. For quick experiments without tests, use the free online React compiler.

They are hands-on practice problems where you build or fix a React component from a starter template, such as a counter, a modal or a data table. On ReactGrind, every challenge is checked by an automated hidden test suite.

You can start with the free challenges without paying. Some are marked PRO and are unlocked with a Pro plan.

When you submit, a hidden test suite mounts your component, interacts with it like a user would, and shows which test cases pass. That is closer to a real interview or take-home than comparing your code with a fixed answer.

They cover hooks (including custom hooks like useDebounce and useLocalStorage), forms and validation, state management with useReducer and context, UI components such as modals, tabs, accordions and data tables, performance topics like memoization and throttling, and debugging exercises. For a hooks-only path, see our React hooks practice page.

Yes. Challenges like autocomplete, data tables and pagination are the kind of UI tasks asked in machine coding and frontend interview rounds. Read our machine coding round guide for how to approach them, or browse our React interview questions.

LeetCode-style problems mostly test algorithms and data structures. React challenges ask you to build and fix real UI components, and the tests interact with them the way a user would, which is closer to a frontend interview. We compare the two in ReactGrind vs LeetCode for frontend roles.

Filter by Beginner difficulty and start with a small problem like the counter. Everything runs in your browser, so there is nothing to install. To experiment first, use the free online React compiler.

ReactGrind

The definitive training ground for React engineers. Build components, debug re-renders, and solve react.js challenges with test cases.

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React Coding Challenges

React coding challenges - frequently asked questions

Where can I practice React online for free?

What are React coding challenges?

Are these React practice problems free?

How are my solutions checked?

What topics do the React coding challenges cover?

Can I use these React coding questions for machine coding round practice?

How are React coding challenges different from LeetCode problems?

Where should a beginner start?