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User Interface Coding

Build dynamic user interfaces using HTML, CSS, JavaScript, or popular UI frameworks like React, Angular, or Vue.
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Solved by ex-interviewers
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Questions List

User Interface Coding GuidesGain an insider overview of essential tips to prepare effectively before you begin practicing.
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GUIDES
  • CounterWarm up questionBuild a simple counter that increments whenever a button is clicked
    Available frameworks
  • AccordionBuild an accordion component that a displays a list of vertically stacked sections with each containing a title and content snippet
    Available frameworks
  • Contact FormBuild a contact form which submits user feedback and contact details to a back end API
    Available frameworks
  • Holy GrailBuild the famous holy grail layout consisting of a header, 3 columns, and a footer
    Available frameworks
  • Progress BarsBuild a list of progress bars that fill up gradually when they are added to the page
    Available frameworks
  • Mortgage CalculatorBuild a calculator that computes the monthly mortgage for a loan
    Available frameworks
  • TabsBuild a tabs component that displays a list of tab elements and one associated panel of content at a time
    Available frameworks
  • Data TableBuild a users data table with pagination features
    Available frameworks
  • Dice RollerBuild a dice roller app that simulates the results of rolling 6-sided dice
    Available frameworks
  • File ExplorerBuild a file explorer component to navigate files and directories in a tree-like hierarchical viewer
    Available frameworks
  • Like ButtonBuild a Like button that changes appearance based on the states
    Available frameworks
  • Modal DialogBuild a reusable modal dialog component that can be opened and closed
    Available frameworks
  • Star RatingBuild a star rating component that shows a row of star icons for users to select the number of filled stars corresponding to the rating
    Available frameworks
  • Todo ListBuild a Todo list that lets users add new tasks and delete existing tasks
    Available frameworks
  • Traffic LightBuild a traffic light where the lights switch from green to yellow to red after predetermined intervals and loop indefinitely
    Available frameworks
  • Digital ClockBuild a 7-segment digital clock that shows the current time
    Available frameworks
  • Tic-tac-toeBuild a tic-tac-toe game that is playable by two players
    Available frameworks
  • Image CarouselBuild an image carousel that displays a sequence of images
    Available frameworks
  • Job BoardBuild a job board that displays the latest job postings from Hacker News
    Available frameworks
  • StopwatchBuild a stopwatch widget that can measure how much time has passed
    Available frameworks
  • Transfer ListBuild a component that allows transferring of items between two lists
    Available frameworks
  • Nested CheckboxesBuild a nested checkboxes component with parent-child selection logic
    Available frameworks
  • Flight BookerPremiumBuild a component that books a flight for specified dates
    Available frameworks
  • Generate TablePremiumGenerate a table of numbers given the rows and columns
    Available frameworks
  • Progress BarPremiumBuild a progress bar component that shows the percentage completion of an operation
    Available frameworks
  • Temperature ConverterPremiumBuild a temperature converter widget that converts temperature values between Celsius and Fahrenheit
    Available frameworks
  • TweetPremiumBuild a component that resembles a Tweet from Twitter
    Available frameworks
  • Accordion IIPremiumBuild an accessible accordion component that has the right ARIA roles, states, and properties
    Available frameworks
  • Accordion IIIPremiumBuild a fully accessible accordion component that has keyboard support according to ARIA specifications
    Available frameworks
  • Analog ClockPremiumBuild an analog clock where the hands update and move like a real clock
    Available frameworks
  • Data Table IIPremiumBuild a users data table with sorting features
    Available frameworks
  • File Explorer IIPremiumBuild a semi-accessible file explorer component that has the right ARIA roles, states, and properties
    Available frameworks
  • File Explorer IIIPremiumBuild a file explorer component using a flat DOM structure
    Available frameworks
  • Grid LightsPremiumBuild a grid of lights where the lights deactivate in the reverse order they were activated
    Available frameworks
  • Modal Dialog IIPremiumBuild a semi-accessible modal dialog component that has the right ARIA roles, states, and properties
    Available frameworks
  • Modal Dialog IIIPremiumBuild a moderately-accessible modal dialog component that supports common ways to close the dialog
    Available frameworks
  • Progress Bars IIPremiumBuild a list of progress bars that fill up gradually in sequence, one at a time
    Available frameworks
  • Tabs IIPremiumBuild a semi-accessible tabs component that has the right ARIA roles, states, and properties
    Available frameworks
  • Tabs IIIPremiumBuild a fully accessible tabs component that has keyboard support according to ARIA specifications
    Available frameworks
  • Progress Bars IIIPremiumBuild a list of progress bars that fill up gradually concurrently, up to a limit of 3
    Available frameworks
  • Birth Year HistogramPremiumBuild a widget that fetches birth year data from an API and plot it on a histogram
    Available frameworks
  • Connect FourPremiumBuild a game for two players who take turns to drop colored discs from the top into a vertically suspended board/grid
    Available frameworks
  • Image Carousel IIPremiumBuild an image carousel that smoothly transitions between images
    Available frameworks
  • Pixel ArtPremiumBuild a pixel art drawing tool where users can paint pixels with selected colors
    Available frameworks
  • Signup FormPremiumBuild a signup form that does validation on user details and submits to a back end API
    Available frameworks
  • Undoable CounterPremiumBuild a counter with a history of the values and ability to undo/redo actions
    Available frameworks
  • Users DatabasePremiumBuild a UI to filter, create, update, and delete users
    Available frameworks
  • Whack-A-MolePremiumBuild a popular arcade game where players attempt to hit moles as they pop up from holes in a board
    Available frameworks
  • Memory GamePremiumBuild a memory game where the player needs to match pairs of cards
    Available frameworks
  • Auth Code InputPremiumBuild an auth code input component that allows users to enter a 6-digit authorization code
    Available frameworks
  • Progress Bars IVPremiumBuild a list of progress bars that fill up gradually concurrently, up to a limit of 3 and allows for pausing and resuming
    Available frameworks
  • Data Table IIIPremiumBuild a generalized data table with pagination and sorting features
    Available frameworks
  • Modal Dialog IVPremiumBuild a fully-accessible modal dialog component that supports all required keyboard interactions
    Available frameworks
  • Data Table IVPremiumBuild a generalized data table with pagination, sorting and filtering features
    Available frameworks
  • Image Carousel IIIPremiumBuild an image carousel that smoothly transitions between images that has a minimal DOM footprint
    Available frameworks
  • Selectable CellsPremiumBuild an interface where users can drag to select multiple cells within a grid
    Available frameworks
  • Tic-tac-toe IIPremiumBuild an N x N tic-tac-toe game that requires M consecutive marks to win
    Available frameworks
  • Transfer List IIPremiumBuild a component that allows transferring of items between two lists, bulk selection/unselection of items, and adding of new items
    Available frameworks
  • WordlePremiumBuild Wordle, the word-guessing game that took the world by storm
    Available frameworks

User Interface Coding Interview Questions for Front End Developers

User interface coding is the bread and butter of front end development. In technical interviews, you're often tested on your skills in building and optimizing user interfaces, managing DOM manipulations, and ensuring that your designs are adaptive across various devices and browsers. Excelling in these areas is crucial for landing a front end engineer role.

Our User Interface Coding questions are designed to help you master these vital skills. You'll work through challenging problems that give you hands-on experience in crafting dynamic user interfaces, designing reusable components, and optimizing performance. These questions are tailored to meet the demands of modern front end development, ensuring that your preparation is relevant and effective.

Key Features

  1. Expert-crafted questions: Each question is carefully developed by experienced engineers with deep knowledge of front end interviews. The questions reflect current industry trends and expectations, ensuring your preparation is aligned with what interviewers are looking for.

  2. Diverse range of challenges: Our question set spans a wide variety of topics, from DOM manipulation to responsive design and accessibility. These challenges are curated to help you build a strong understanding of user interface coding, equipping you to handle any scenario during an interview.

  3. Detailed solutions in popular frameworks: Each question is accompanied by a comprehensive solution, provided in all popular UI frameworks, as well as JavaScript or TypeScript. These solutions offer deep insights into the best practices and methodologies, ensuring you can apply them effectively across different frameworks and development environments.

  4. Real-world coding environment with instant UI preview: Practice in an in-browser coding workspace that mirrors the conditions of actual front end coding interviews. Our environment not only helps you get comfortable with the tools and workflows you'll encounter during real interviews, but also includes an instant preview feature, allowing you to see your built UI in real-time as you code, providing immediate visual feedback and enhancing your development process.

  5. Immediate feedback with automated tests: Receive instant feedback on your code with our automated test cases. This real-time evaluation helps you quickly identify and correct mistakes, ensuring continuous improvement as you prepare for front end developer interviews.