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About the test

The HTML/CSSJavaScript, and React online test assesses candidates' knowledge of HTML, CSS , JavaScript, and React as well as their ability to combine those technologies and take advantage of commonly used parts of Bootstrap.

It's an ideal test for pre-employment screening. A good front-end developer should be able to combine HTML, CSS, JavaScript, and React to create a dynamic and interactive user interface.

This online test requires candidates to solve common HTML/CSS, JavaScript, and React coding problems.

Sample public questions

Easy
7 min
code
Public
HTML/CSS
Borders
Element Size
Styling

Every user on your website has an image avatar that is displayed when they post a comment. You want to style these images differently from other images on your site. Add a CSS class named avatar that fulfils the following requirements:

  1. The avatar's border is rounded, so that it appears as a circle.
  2. The avatar's width and height are both 150px.
  3. The avatar has a solid border, has a width of 2px, and be colored gray.

For example, the avatar in the template should look like:

Cat avatar

Easy
3 min
code
Public
JavaScript
Error Handling
Language

Implement the ensure function so that it throws an error if called without arguments or the argument is undefined. Otherwise it should return the given value.

Easy
7 min
code
Public
React
Effect Hook
React Hooks
Reference Hook

Finish the FocusableInput component so that the input element automatically receives focus on the first render if the shouldFocus prop is true.

The component should use React Hooks.

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106 more premium HTML/CSS, JavaScript, and React questions

Positive Numbers, Links, Truthy Expressions, Ad, Article Style, Baby Names, Cities, Editor, Format Table, Keywords, Label Color, Loading, Logo, Shirts, Upload, Warehouse, Widgets, iframe, Toggle Options Visibility, Cards Widget, Error Catcher, Max Sum, Product Rating, Launch Time, Function Wrapper, Link, Log Parser, Unique Numbers, Click Button, Email Input, List Wrapper, Load URL, Photon Frequency, Subscription, Login Form, Product Search, Addition, Async Paragraph, Color Codes, Tax Calculator, Bookmark, Screen Reader, Game Offer, Bicycle Report, Curious Leaf, Gaming Console, Travel Blog, Confirm, Blog, Friend, Christmas Tree, Timesheet, Email Tables, Shopping List, Data Entry, Price List, Ice Cream Flavors, Memory Game, TestDome Logo, Pet Form, Post Comment, Tooltip Component, Simple Calculator, Tab Strip, Theme Context Switcher, Player Status, Row Appender, Segment, Height, Product Rating, Validation, Cards, Array Search, Screen, Timer, Username, Snapshot, Scale Font Size, Products, Paragraph, Hide Button, A Tag, Hobbies, Loading Bar, Log Patch, Double, Table of Names, Filter, Reorder, Reorder, Share Button, Contact Form, Email Form, Post Comment, Details, Date Transform, Trading Data Paging, New Folder, Shipping, Chain Link, Node, Read Write Execute, Numbers To Text, Paper Strip, Vectors, Special Actions.

Skills and topics tested

  • JavaScript
  • Closures
  • HTML/CSS
  • CSS Selectors
  • Styling
  • Language
  • Element Spacing
  • Flexbox
  • Positioning
  • Fonts
  • Elements and Attributes
  • HTML5
  • Animation
  • Forms
  • Hyperlink
  • IFrame
  • React
  • Data Binding
  • Components
  • Managing State
  • React Hooks
  • Error Boundaries
  • Algorithmic Thinking
  • Event Handling
  • Timing Events
  • Exceptions
  • Serialization
  • XML
  • Dictionary
  • Higher Order Components
  • Ajax
  • HTTP
  • Promise
  • Arrays
  • Conditional Rendering
  • State Hook
  • Hooks
  • Effect Hook
  • CSS Advanced
  • Element Size
  • Asynchronous Calls
  • Associative Arrays
  • Classes
  • Objects
  • Bookmarks
  • Accessibility
  • CSS Basics
  • Tables
  • Responsive Design
  • UI
  • Dialog Box
  • Semantic Tags
  • Graphs
  • Borders
  • Inline Styles
  • Selectors
  • Strings
  • CSS Layout
  • Content Manipulation
  • DOM Manipulation
  • Portals
  • Reducer Hook
  • Context
  • Arithmetic
  • Attribute Manipulation
  • Recursion
  • Bug Fixing
  • ECMAScript 2015
  • Callback
  • Regex
  • JSON
  • Sorting
  • Iteration
  • Monkey Patching
  • Pagination
  • Linked List
  • Tree

For job roles

  • JavaScript Developer
  • React Developer
  • UI/UX Developer
  • Web Front-End Developer

Sample candidate report

What others say

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Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

Jan Opperman, Grindrod Bank

Product reviews

G2 High Performer 2022G2 Read Our Reviews

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