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Online React Test for Making Objective and Informed Hiring Decisions

An online React test is a pre-employment test to understand how well candidates use the React.js library and how familiar they are with the crucial React concepts. This test also assesses a candidate's skills and ability to leverage the most-used advanced concepts to solve complex problems.

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Inside This Online React Test

Recruiters and hiring managers use the ReactJS online test to assess candidates' proficiency in using ReactJS open-source library for building user interfaces, particularly for single-page applications.  

The assessment is designed and validated by subject matter experts to assess an applicant's knowledge and applied coding skills. This ReactJS online test evaluates a candidate's proficiency in hands-on programming, JavaScript, and ReactJS basics.  

This 60-minute test includes 19 MCQs (Multiple Choice Questions) and one coding problem to be solved in real-time on our front-end coding simulator.   

This React online test helps to screen candidates for the following roles:   

  • Software Developer (React JS and JavaScript)  
  • Junior React JS JavaScript Developer  
  • React JS & JavaScript Application Developer  


ReactJS is an open-source front-end JavaScript library for building user interfaces for web applications. Meta and a community of developers and companies run and maintain it. Launched in 2013, React is one of the most extensively used front-end libraries for web development. It includes different extensions that help provide architectural support for entire applications: Flux and React Native, to name a few. Some of the world's leading companies, such as Airbnb, BBC, Meta, etc., leverage the functionalities of React.js because of its stability, scalability, and efficiency.  

React.js has become a hot favorite amongst developers due to its ease of developing websites and apps. Listed below are some reasons behind its popularity:  

  • Provides flexibility and scalability   
  • Cost-efficient  
  • Easy UI (User Interface) creation  
  • Unidirectional data binding   
  • Virtual DOM (Document Object Model)  
  • Easy debugging process  

With features galore, it is safe to assume that most fortune 500 companies would choose to use React as their go-to tool. Also, most developers prefer ReactJS for front-end development.  

However, organizations can only harness the potential of React's advanced library if they have a diverse, flourishing team of talented ReactJS developers. These professionals must have desired skills and technical exposure to understand organizational needs, helping them translate the business needs to technical specifications. However, we also cannot rule out the fact that there is an urgent requirement for well-versed, highly competent professionals in this sector.  

Whether it is about preparing an intuitive data visualization tool or material design dashboard, single-page mobile-based application or cross-platform web application, talented ReactJS professionals are much sought-after nowadays. This is where the role of React online tests comes into play. These competency-focused assessments will help employers identify shining stars with proven React JS development skills. The React coding test assesses test-takers for the skills that a developer with 1-3 years of experience in the framework should possess, such as proficiency in JavaScript basics, ReactJS basics and hands-on programming skills using ReactJS.  

The React JS test uses a combination of Practical hands-on coding questions and MCQ (Multiple Choice Questions) questions. The test has coding questions to assess the front-end web development skills on a front-end simulator. The MCQ-based questions aim to determine the understanding of the various subskills that comprise JavaScript and ReactJS basics. Candidates who perform well and achieve adequate scores on this assessment understand React's intricacies and basic concepts and can implement any functionality by leveraging its library and following the best approaches outlined by the community.  

 Applications of Online ReactJS Test  

The online React test provides employers with an industry-proven tool to help them hire job-fit developers within a brief time, keeping the implicit biases and hasty decisions out of the equation. The best part about the React JS skills tests is that test-takers can take them from anywhere in the world. In addition, the React coding test reports are easy-to-understand and provide the recruiters with insightful data, helping them select the most relevant candidates for the interview.  

Usually, the React assessment tests a candidate's proficiency in the following parameters:  

  • In-depth knowledge of React.js and its underlying fundamentals  
  • Ability to leverage some of the most used ReactJS workflows (Flux, Redux) to develop and implement user interface components  
  • Understanding of HTML, CSS3, JavaScript  
  • Well-versed in data structure libraries  
  • Knowledge of server-side scripting  


This React Online Test is a part of following Skills Libraries

React Skills Assessment Competency Framework

Get a detailed look inside the test

React JS Assessment Competencies Under Scanner

ReactJS Development


Hands-on Programming

This React coding test includes practical hands-on coding questions for assessing a candidate's front-end web development skills on a front-end simulator.

JavaScript Basics

This ReactJS online test evaluates a candidate's strength in these JavaScript subskills: Scopes and Namespaces, Parsing, Events and Event Handlers, Functions - Application, Forms and HTML and Links.

ReactJS Basics

This ReactJS assessment evaluates the following subskills in ReactJS; Components- Application, Events- Application, Function, Props- Application, Pure Component- Application, Render Method- Application and State- Application.

Customize This React Assessment

Flexible customization options to suit your needs

Set difficulty level of test

Choose easy, medium or hard questions from our skill libraries to assess candidates of different experience levels.

Combine multiple skills into one test

Add multiple skills in a single test to create an effective assessment. Assess multiple skills together.

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Add, edit or bulk upload your own coding questions, MCQ, whiteboarding questions & more.

Request a tailor-made test

Get a tailored assessment created with the help of our subject matter experts to ensure effective screening.

The Mercer | Mettl React Online Test Advantage

The Mercer | Mettl Edge

  • Industry Leading 24/7 Support
  • State of the art examination platform
  • Inbuilt Cutting Edge AI-Driven Proctoring
  • Simulators designed by developers
  • Tests Tailored to Your business needs
  • Support for 20+ Languages in 80+ Countries Globally

React Coding Test Can Be Setup in 4 Steps

Step 1: Add test

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Step 2: Share link

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Step 3: Test View

Candidate take the test

Step 4: Insightful Report

You get their tests report

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The validity of Mercer | Mettl''s assessments is exceptionally robust. It enabled us to funnel people who were precisely the type we needed. Mercer | Mettl helped us to accurately identify high-potential candidates within our internal team. more

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Frequently Asked Questions (FAQs)

We can do so selectively. Please write to us about your request; we will be glad to assist.

Meta (erstwhile known as Facebook), the social media giant, launched ReactJS in 2013. React is still one of the most sought-after open-source JavaScript frameworks. The main feature of this framework is to create rich, engaging web applications that run entirely with minimal coding.

React is the go-to source for front-end developers nowadays. The more you practice, the better you get at these skills, and many companies regard React as one of the essential skills. Listed below are some skills candidates should possess if they want to be successful in their respective roles:

  • HTML + CSS 
  • JavaScript Fundamentals + ES6 
  • Redux 
  • JSX 
  • Git 
  • Node + npm 

We have customized ReactJS test reports in the past based on client requirements. Please write to us with such a request, and we would be glad to work out a solution for you.

React, an open-source JavaScript library, has made it easy to build user interfaces, particularly for single-page applications. It also allows developers to make reusable UI components.

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