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JavaScript
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React Coding Questions
Top React coding interview questions to build the most commonly-asked front end UI components and applications.
Try these popular React questions
Contact Form
Build a contact form which submits user feedback and contact details to a back end API
Available frameworks
Digital Clock
Build a 7-segment digital clock that shows the current time
Available frameworks
Holy Grail
Build the famous holy grail layout consisting of a header, 3 columns, and a footer
Available frameworks
Coding Format
JavaScript Utilities
User Interface
Data Structures & Algorithms
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Number of questions
36 questions
Total time
14 hours total
Questions List
Counter
Warm Up Question
Build a simple counter that increments whenever a button is clicked
Difficulty
Easy
Available frameworks
Users completed
8315 completed
Contact Form
Build a contact form which submits user feedback and contact details to a back end API
Difficulty
Easy
Available frameworks
Users completed
4609 completed
Holy Grail
Build the famous holy grail layout consisting of a header, 3 columns, and a footer
Difficulty
Easy
Available frameworks
Users completed
3705 completed
Mortgage Calculator
Build a calculator that computes the monthly mortgage for a loan
Difficulty
Easy
Available frameworks
Users completed
699 completed
Tabs
Build a tabs component that displays a list of tab elements and one associated panel of content at a time
Difficulty
Medium
Available frameworks
Users completed
1203 completed
Todo List
Build a Todo list that lets users add new tasks and delete existing tasks
Difficulty
Medium
Available frameworks
Users completed
2109 completed
Traffic Light
Build a traffic light where the lights switch from green to yellow to red after predetermined intervals and loop indefinitely
Difficulty
Medium
Available frameworks
Users completed
657 completed
Digital Clock
Build a 7-segment digital clock that shows the current time
Difficulty
Medium
Available frameworks
Users completed
408 completed
Job Board
Build a job board that displays the latest job postings from Hacker News
Difficulty
Medium
Available frameworks
Users completed
436 completed
Accordion
Build an accordion component that a displays a list of vertically stacked sections with each containing a title and content snippet
Difficulty
Easy
Available frameworks
Users completed
1111 completed
Flight Booker
Build a component that books a flight for specified dates
Difficulty
Easy
Available frameworks
Users completed
517 completed
Generate Table
Generate a table of numbers given the rows and columns
Difficulty
Easy
Available frameworks
Users completed
560 completed
Progress Bar
Build a progress bar component that shows the percentage completion of an operation
Difficulty
Easy
Available frameworks
Users completed
1009 completed
Progress Bars
Build a list of progress bars that fill up gradually when they are added to the page
Difficulty
Easy
Available frameworks
Users completed
535 completed
Temperature Converter
Build a temperature converter widget that converts temperature values between Celsius and Fahrenheit
Difficulty
Easy
Available frameworks
Users completed
864 completed
Tweet
Build a component that resembles a Tweet from Twitter
Difficulty
Easy
Available frameworks
Users completed
472 completed
Accordion II
Build an accessible accordion component that has the right ARIA roles, states, and properties
Difficulty
Medium
Available frameworks
Users completed
232 completed
Accordion III
Build a fully accessible accordion component that has keyboard support according to ARIA specifications
Difficulty
Medium
Available frameworks
Users completed
114 completed
Analog Clock
Build an analog clock where the hands update and move like a real clock
Difficulty
Medium
Available frameworks
Users completed
181 completed
Grid Lights
Build a grid of lights where the lights deactivate in the reverse order they were activated
Difficulty
Medium
Available frameworks
Users completed
268 completed
Like Button
Build a Like button that changes appearance based on the states
Difficulty
Medium
Available frameworks
Users completed
341 completed
Progress Bars II
Build a list of progress bars that fill up gradually in sequence, one at a time
Difficulty
Medium
Available frameworks
Users completed
180 completed
Star Rating
Build a star rating component that shows a row of star icons for users to select the number of filled stars corresponding to the rating
Difficulty
Medium
Available frameworks
Users completed
733 completed
Tabs II
Build a semi-accessible tabs component that has the right ARIA roles, states, and properties
Difficulty
Medium
Available frameworks
Users completed
113 completed
Tabs III
Build a fully accessible tabs component that has keyboard support according to ARIA specifications
Difficulty
Medium
Available frameworks
Users completed
69 completed
Progress Bars III
Build a list of progress bars that fill up gradually concurrently, up to a limit of 3
Difficulty
Medium
Available frameworks
Users completed
112 completed
Tic-tac-toe
Build a tic-tac-toe game that is playable by two players
Difficulty
Medium
Available frameworks
Users completed
151 completed
Stopwatch
Build a stopwatch widget that can measure how much time has passed
Difficulty
Medium
Available frameworks
Users completed
137 completed
Transfer List
Build a component that allows transferring of items between two lists
Difficulty
Medium
Available frameworks
Users completed
141 completed
Undoable Counter
Build a counter with a history of the values and ability to undo/redo actions
Difficulty
Medium
Available frameworks
Users completed
119 completed
Whack-A-Mole
Build a popular arcade game where players attempt to hit moles as they pop up from holes in a board
Difficulty
Medium
Available frameworks
Users completed
54 completed
Memory Game
Build a memory game where the player needs to match pairs of cards
Difficulty
Medium
Available frameworks
Users completed
57 completed
Progress Bars IV
Build a list of progress bars that fill up gradually concurrently, up to a limit of 3 and allows for pausing and resuming
Difficulty
Hard
Available frameworks
Users completed
62 completed
Tic-tac-toe II
Build an N x N tic-tac-toe game that requires M consecutive marks to win
Difficulty
Hard
Available frameworks
Users completed
38 completed
Transfer List II
Build a component that allows transferring of items between two lists, bulk selection/unselection of items, and adding of new items
Difficulty
Hard
Available frameworks
Users completed
40 completed
Wordle
Build Wordle, the word-guessing game that took the world by storm
Difficulty
Hard
Available frameworks
Users completed
27 completed