Enzyme vs react-virtualized
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A JavaScript testing utility that lets you inspect and simulate React component output in tests.
Open source · MIT
React components for efficiently rendering large lists and tabular data.
The short answer
Choose Enzyme if you need…
- Developers maintaining React codebases that already have component tests
- Teams testing React 16 or older versions with a matching official adapter
- Developers who want shallow rendering to test one component in isolation
- Projects that use Mocha, Chai, Jest, or another test runner of their choice
Choose react-virtualized if you need…
- React developers who need to display long lists of items
- Teams building data tables or grids with many rows
- Developers who want a component-based approach to windowing
Side-by-side
| Enzyme | react-virtualized | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 19.8k | 27.1k |
| Setup difficulty | Intermediate | Intermediate |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | JavaScript | TypeScript |
| Last code update | 13 months ago | 6 days ago |
What each one is
Enzyme
Enzyme is a JavaScript testing utility for React. It lets developers check what a React component renders, find elements inside it, and simulate actions like clicks, with an API modeled on jQuery's traversal style. It is used alongside a test runner and assertion library such as Mocha, Chai, or Jest.
react-virtualized
react-virtualized is a set of React components for displaying long lists and tables without rendering every row at once. Instead of creating thousands of DOM elements, it renders only the items currently visible, which keeps pages responsive with large data sets. Developers use it inside their own React apps.
Best for
Enzyme
- Developers maintaining React codebases that already have component tests
- Teams testing React 16 or older versions with a matching official adapter
- Developers who want shallow rendering to test one component in isolation
- Projects that use Mocha, Chai, Jest, or another test runner of their choice
react-virtualized
- React developers who need to display long lists of items
- Teams building data tables or grids with many rows
- Developers who want a component-based approach to windowing
Strengths
Enzyme
- Simple, readable API inspired by jQuery for finding and traversing rendered output
- Works with any test runner or assertion library, according to the README
- Supports shallow, full DOM, and static rendering modes in one library
react-virtualized
- Renders only visible items, which helps performance with large data sets
- Provides list and grid components for both lists and tabular data
- Documentation site includes live examples
Not ideal for
Enzyme
- Projects on React versions not covered by an adapter in the README, since compatibility is limited to the listed adapter versions
- People writing new React tests who want a current, actively documented approach; the README points to migration from Enzyme 2.x and does not describe a newer React testing path
- Hooks-heavy code using shallow rendering, because the README notes useEffect and useLayoutEffect are not called and useCallback does not memoize in shallow mode
react-virtualized
- Projects that do not use React, since the components are built for it
- Small pages with only a few dozen items, where virtualization adds complexity without much benefit
- Developers looking for a newer, actively evolving alternative, since the README does not describe current maintenance status
Trade-offs
Enzyme
- Requires a separate adapter package matched to your React version, adding setup steps
- Shallow rendering has known gaps with React hooks as described in the README
- The README has a truncated section and gives limited detail on current maintenance status, so the project's future support is unclear from this text
react-virtualized
- Requires React, so it is not useful outside that ecosystem
- The README excerpt provided does not show setup steps, so integration effort is unclear from this source
- Most of the README shown is about sponsorships rather than technical details
Getting started
Enzyme
Install enzyme and the React 16 adapter as dev dependencies
npm i --save-dev enzyme enzyme-adapter-react-16react-virtualized
Clone the repository
git clone https://github.com/bvaughn/react-virtualizedFrequently asked questions
What is the difference between Enzyme and react-virtualized?
Enzyme: A JavaScript testing utility that lets you inspect and simulate React component output in tests. react-virtualized: React components for efficiently rendering large lists and tabular data. Enzyme suits developers maintaining react codebases that already have component tests, while react-virtualized suits react developers who need to display long lists of items.
Are Enzyme and react-virtualized free?
Enzyme: Free and open source. react-virtualized: Free and open source.
Is Enzyme or react-virtualized more popular?
react-virtualized has more GitHub stars (27.1k) than Enzyme (19.8k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Enzyme and react-virtualized?
Other options people compare them with include React Testing Library, Jest, Mocha, pytest, Material UI.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.