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50+ questions
JavaScript
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HTML Questions
50+ HTML interview questions, including quiz-style knowledge questions and HTML coding questions.
Try these popular HTML 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
getElementsByTagName
Implement a function to get all DOM elements that match a tag
Languages
HTML
JS
TS
Coding
Quiz
Coding Format
User Interface
JavaScript Utilities
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Number of questions
46 questions
Total time
18 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
6382 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
3615 completed
Holy Grail
Build the famous holy grail layout consisting of a header, 3 columns, and a footer
Difficulty
Easy
Available frameworks
Users completed
2893 completed
Mortgage Calculator
Build a calculator that computes the monthly mortgage for a loan
Difficulty
Easy
Available frameworks
Users completed
494 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
875 completed
Todo List
Build a Todo list that lets users add new tasks and delete existing tasks
Difficulty
Medium
Available frameworks
Users completed
1658 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
480 completed
Digital Clock
Build a 7-segment digital clock that shows the current time
Difficulty
Medium
Available frameworks
Users completed
305 completed
Job Board
Build a job board that displays the latest job postings from Hacker News
Difficulty
Medium
Available frameworks
Users completed
272 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
855 completed
Flight Booker
Build a component that books a flight for specified dates
Difficulty
Easy
Available frameworks
Users completed
373 completed
Generate Table
Generate a table of numbers given the rows and columns
Difficulty
Easy
Available frameworks
Users completed
449 completed
jQuery.css
Implement a jQuery-like function that sets the style of a DOM element
Difficulty
Easy
Languages
HTML
CSS
JS
TS
Users completed
779 completed
Progress Bar
Build a progress bar component that shows the percentage completion of an operation
Difficulty
Easy
Available frameworks
Users completed
803 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
418 completed
Temperature Converter
Build a temperature converter widget that converts temperature values between Celsius and Fahrenheit
Difficulty
Easy
Available frameworks
Users completed
675 completed
Tweet
Build a component that resembles a Tweet from Twitter
Difficulty
Easy
Available frameworks
Users completed
379 completed
Accordion II
Build an accessible accordion component that has the right ARIA roles, states, and properties
Difficulty
Medium
Available frameworks
Users completed
178 completed
Accordion III
Build a fully accessible accordion component that has keyboard support according to ARIA specifications
Difficulty
Medium
Available frameworks
Users completed
87 completed
Analog Clock
Build an analog clock where the hands update and move like a real clock
Difficulty
Medium
Available frameworks
Users completed
139 completed
getElementsByTagName
Implement a function to get all DOM elements that match a tag
Difficulty
Medium
Languages
HTML
JS
TS
Users completed
522 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
203 completed
HTML Serializer
Implement a function to serialize an object into an HTML string with indentation
Difficulty
Medium
Languages
HTML
JS
TS
Users completed
142 completed
Identical DOM Trees
Implement a function to determine if two DOM trees are the same
Difficulty
Medium
Languages
HTML
JS
TS
Users completed
281 completed
jQuery Class Manipulation
Implement a set of jQuery-like functions that manipulates classes on a DOM element
Difficulty
Medium
Languages
HTML
CSS
JS
TS
Users completed
207 completed
Like Button
Build a Like button that changes appearance based on the states
Difficulty
Medium
Available frameworks
Users completed
254 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
133 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
567 completed
Tabs II
Build a semi-accessible tabs component that has the right ARIA roles, states, and properties
Difficulty
Medium
Available frameworks
Users completed
92 completed
Tabs III
Build a fully accessible tabs component that has keyboard support according to ARIA specifications
Difficulty
Medium
Available frameworks
Users completed
56 completed
Text Search
Implement a function to highlight text if a searched term appears within it
Difficulty
Medium
Languages
HTML
JS
TS
Users completed
296 completed
getElementsByClassName
Implement a function to get all DOM elements that contain the specified classes
Difficulty
Medium
Languages
HTML
CSS
JS
TS
Users completed
261 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
83 completed
Text Search II
Implement a function to highlight text if searched terms appear within it
Difficulty
Medium
Languages
HTML
JS
TS
Users completed
87 completed
Tic-tac-toe
Build a tic-tac-toe game that is playable by two players
Difficulty
Medium
Available frameworks
Users completed
106 completed
Signup Form
Build a signup form that does validation on user details and submits to a back end API
Difficulty
Medium
Available frameworks
Users completed
218 completed
Stopwatch
Build a stopwatch widget that can measure how much time has passed
Difficulty
Medium
Available frameworks
Users completed
111 completed
Transfer List
Build a component that allows transferring of items between two lists
Difficulty
Medium
Available frameworks
Users completed
102 completed
Undoable Counter
Build a counter with a history of the values and ability to undo/redo actions
Difficulty
Medium
Available frameworks
Users completed
90 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
34 completed
Memory Game
Build a memory game where the player needs to match pairs of cards
Difficulty
Medium
Available frameworks
Users completed
38 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
50 completed
Table of Contents
Implement a function to construct a table of contents from an HTML document
Difficulty
Hard
Languages
HTML
JS
TS
Users completed
82 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
29 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
28 completed
Wordle
Build Wordle, the word-guessing game that took the world by storm
Difficulty
Hard
Available frameworks
Users completed
18 completed