React Online Test

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About the test

The React online test assesses knowledge of building web user interfaces with the React/ReactJS library through a series of live coding questions.

The assessment includes work-sample tasks such as:

  • Creating reusable Components.
  • Working with Hooks to access state and other React features.
  • Handling user events and updating the application based on user actions.

A good React/ReactJS developer should be able to work with the library effectively to create maintainable and accessible web user interfaces.

Sample public questions

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.

Easy
20 min
code
Public
React
Data Binding
React Hooks
State Hook

An RPG game lets you assign points to various attributes of your character to improve it. The points earned by the character are available to assign across all attributes. Each attribute can only be assigned at most 70% of totalPoints (rounded down to the nearest integer) unless totalPoints is 1, in which case only one attribute can get a maximum of 1 point. The sum of all points assigned plus the points remaining should add up to totalPoints.

Implement the CharacterAttributes component with the logic described above and the following requirements:

  • Points should be assigned by moving the slider and the remaining points should be displayed in the span tag.
  • When initialized, all points are available and all sliders start at 0.
  • Each slider must have a range from 0 up to totalPoints.

For example, if totalPoints is 15 then the user shouldn't be able to drag the slider past 10 even if more points are available.

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25 more premium React questions

Error Catcher, Tooltip Component, Reorder, List Wrapper, Email Form, Toggle Options Visibility, Subscription, Player Status, Simple Calculator, Shopping List, Product Rating, Tab Strip, Details, Email Input, Contact Form, Post Comment, Login Form, Product Search, Pet Form, Async Paragraph, Click Button, Cards Widget, Habit Chart, Theme Context Switcher, Factory Status.

Skills and topics tested

  • React
  • Components
  • Error Boundaries
  • Portals
  • Event Handling
  • React Hooks
  • Higher Order Components
  • Data Binding
  • Conditional Rendering
  • State Hook
  • Effect Hook
  • Reducer Hook
  • Managing State
  • RAID
  • Content Manipulation
  • Hooks
  • Forms
  • Asynchronous Calls
  • Context

For job roles

  • JavaScript Developer
  • React 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.

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Product reviews

G2 - Crowd Badge
G2 - High Performer (2022)
Capterra - 4.5 Stars
Capterra - Shortlist (2023)

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