CF

React Component Testing with Vitest

1h 38m 34s
English
Paid
Updated September 2026

React Component Testing with Vitest is a 38-lesson 1 hour 38 minutes self-paced course by Artem Zakharchenko. Component tests are only as trustworthy as the environment they run in, and for a long time that meant JSDOM — a simulated DOM that never quite matched a real browser and needed constant workarounds.

Course facts

Lessons
38
Duration
1 hour 38 minutes
Level
All levels
Language
English
Updated
2026-09-11
Instructor
Artem Zakharchenko
Price
Premium

Component tests are only as trustworthy as the environment they run in, and for a long time that meant JSDOM — a simulated DOM that never quite matched a real browser and needed constant workarounds. Vitest Browser Mode changes that by running React component tests in an actual browser.

What you'll learn

  • Setting up and using Vitest Browser Mode for real-browser component testing
  • Where JSDOM falls short, and why browser testing closes that gap
  • Migrating existing JSDOM tests over to browser mode
  • Configuring Playwright for browser automation
  • Running unit and component tests together in one project

Practical skills

You'll also pick up finding elements the way real users do, simulating user events, mocking APIs with Mock Service Worker, testing page transitions, and debugging failing tests with DOM inspection and conditional breakpoints. Across 38 lessons with companion code on GitHub, it's built for any React developer who wants tests worth trusting, regardless of testing experience.

Additional

https://github.com/epicweb-dev/react-component-testing-with-vitest

Who teaches React Component Testing with Vitest? Artem Zakharchenko

Artem Zakharchenko thumbnail

Artem Zakharchenko is a Ukrainian software engineer best known as the creator of Mock Service Worker (MSW) — the de-facto standard for API mocking in modern JavaScript test suites — and as a lead instructor on the EpicWeb.dev testing track alongside Kent C. Dodds.

His CourseFlix listing carries four Artem Zakharchenko courses: Testing Fundamentals (EpicWeb), Mocking Techniques in Vitest, Advanced Vitest Patterns, and React Component Testing with Vitest. Material is paid and aimed at JavaScript developers who want to make testing a first-class part of their workflow rather than an afterthought.

What lessons are included in React Component Testing with Vitest?

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#1: Introduction to React Component Testing with Vitest Browser Mode
All Course Lessons (38)
#Lesson TitleDurationAccess
1
Introduction to React Component Testing with Vitest Browser Mode Demo
01:50
2
Sunsetting JSDOM
01:32
3
Break JSDOM - Problem
00:48
4
Break JSDOM - Solution
03:32
5
Recap Of Sunsetting JSDOM
00:27
6
Vitest Browser Mode
04:00
7
Installation and Setup - Problem
02:50
8
Installation and Setup - Solution
00:13
9
Migrate The Test - Problem
00:35
10
Migrate The Test - Solution
03:12
11
Playwright - Problem
01:16
12
Playwright - Solution
02:58
13
Shared Assets - Problem
00:41
14
Shared Assets - Solution
04:15
15
Multiple Workspaces - Problem
00:51
16
Multiple Workspaces - Solution
07:20
17
Outro Vitest Browser Mode
00:42
18
Best Practices
01:45
19
Queries - Problem
00:44
20
Queries - Solution
05:42
21
User Events - Problem
01:01
22
User Events - Solution
04:09
23
Network Mocking - Problem
12:21
24
Network Mocking - Solution
05:42
25
Element Presence - Problem
01:21
26
Element Presence - Solution
04:14
27
Page Navigation - Problem
01:15
28
Page Navigation - Solution
04:15
29
Recap Of Best Practices
00:27
30
Debugging Tests
00:56
31
DOM Snapshots - Problem
01:26
32
DOM Snapshots - Solution
02:24
33
Debugger - Problem
03:58
34
Debugger - Solution
01:35
35
Breakpoints - Problem
02:00
36
Breakpoints - Solution
04:59
37
Recap Of Debugging
00:38
38
React Component Testing with Vitest Outro
00:40
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Frequently asked questions

What prerequisites should I have before enrolling in this course?
Before enrolling, you should have a basic understanding of React development. Familiarity with JavaScript and general web development concepts is also recommended. The course is targeted at React developers who want to improve their component testing skills.
What projects will I work on in this course?
In this course, you will work on projects that involve migrating tests from JSDOM to browser mode, configuring Playwright for browser automation, and organizing test environments. You will engage in exercises focusing on locating elements, implementing user events, and mocking APIs using Mock Service Worker.
How does this course compare to other testing courses?
This course specifically focuses on testing React components using Vitest Browser Mode, which allows testing directly in a real browser rather than an artificial environment like JSDOM. It emphasizes practical skills such as organizing test environments and debugging, which may not be covered in other testing courses.
What specific tools will I learn to use in this course?
You will learn to use Vitest for browser-based testing and Playwright for browser automation testing of components. The course also covers using Mock Service Worker for API mocking, and various debugging tools like DOM inspection and breakpoints.
What is not covered in this course that I may need to learn elsewhere?
The course does not cover basic React development or JavaScript fundamentals. It also does not delve into non-browser-based testing frameworks or testing outside the context of React components. It is focused on leveraging Vitest and Playwright for testing within a browser.
What is the time commitment required for this course?
The course consists of 38 lessons. The exact runtime is not specified, but you should allocate time for both the lessons and hands-on exercises, which may include setting up environments and debugging tests. Plan for additional time to fully understand and apply the practices taught.
How will the skills learned in this course benefit my career?
The skills gained from this course, such as effective component testing, browser-based automation, and debugging techniques, are valuable for any React developer. They enhance your ability to write reliable tests, which is crucial in production-level applications, thereby strengthening your development and testing acumen.