Coding Challenges
Explore our collection of coding challenges and practice questions. Filter by topic, difficulty, and more to find the perfect challenges for your learning journey.
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How to Recursively Transform Nested Objects Using Custom Rules in JavaScript
Hard
Object transformationRecursionType conversion+1
Understanding Custom Form Field Validation Output in JavaScript with Regular Expressions
Medium
ValidationRegular expressionsFunctional programming+1
How to Add Click Event Listener and Prevent Form Submission Default Behavior in JavaScript
Easy
DomEvents
Calculate Shopping Cart Total with Category-Based Discounts using JavaScript Reduce
Medium
ReduceArrays
How to Validate Email Addresses Using JavaScript Regex Pattern Matching
Medium
RegexValidation
JavaScript: Why is my async discount calculation in shopping cart returning a Promise instead of the total?
Medium
AsyncPromisesError handling
Building a Real-Time Collaborative Text Editor with React Hooks and WebSocket Integration
Hard
ReactReact hooksWebsockets+2
React Performance: Optimizing Price Formatting Function to Prevent Unnecessary Re-renders
Easy
ReactReact performanceMemoization+2
Optimizing React Data Grid Performance: Implementing Virtual Scrolling for Large Datasets
Medium
ReactPerformance optimizationData processing+1
Implementing a React Custom Hook for Async Form Validation with Debounce
Hard
ReactFormsValidation+2
React Memory Leak: How to Properly Clean Up EventSource Subscriptions in useEffect
Easy
ReactEvent sourceMemory leaks+2
React File Upload Component Memory Leak: Fixing XHR Progress Tracking Issues
Hard
ReactFile uploadXhr+1
Fix Memory Leak in React Carousel Animation Hook using RequestAnimationFrame
Medium
ReactAnimationRequestanimationframe+2
React UserPreferences Component Missing Error Handling in API Data Fetching
Easy
ReactCode reviewError handling+1
React Virtual Table Performance Issue: Unsafe clientHeight Access in useMemo Hook
Medium
ReactReact hooksVirtualization+2