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

10 min
Conditional Rendering
Event Handling
Managing State

The Message component contains an anchor element and a paragraph below the anchor. Rendering of the paragraph should be toggled by clicking on the anchor element using the following logic:

  • At the start, the paragraph should not be rendered.
  • After a click, the paragraph should be rendered.
  • After another click, the paragraph should not be rendered.

Finish the Message component by implementing this logic.

7 min
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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23 more premium React questions

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

Skills and topics tested

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

For job roles

  • JavaScript Developer
  • React Developer
  • Web Front-End Developer

Sample candidate report

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Product reviews

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

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