Compare tools side by side · TechInTrends

Pure-JS implementation of web standards used as the default simulated DOM for Jest and Vitest tests.

Testing Library

User-centric DOM testing utilities for React, Vue, Angular and Svelte that query like users do.

Workshop for building, documenting and testing UI components in isolation.

Fast JavaScript DOM implementation, a lighter and quicker alternative to jsdom for unit tests.

Head to head

Metric	jsdom	Testing Library	Storybook	happy-dom
Stars	21.7k	19.7k	91.5k	4.7k
Weekly downloads	155M	92.8M	35.5M	33.6M
Download growth	+38%	+45%	+37%	+93%
Popularity score	91/100	89/100	92/100	81/100
Forks	1.8k	1.2k	10.5k	375
Open issues	239	86	1.8k	564
Last commit	5d ago	2mo ago	today	1w ago
Latest version	31.0.0	16.3.3	10.6.7	21.0.4
License	n/a	MIT	MIT	MIT
First released	2010	2018	2016	2019
Signals	Popular	Popular	Popular	Trending (detected automatically)Rising
Listed in	Testing & QA › Component & UI Testing	Frontend › Frontend Testing Testing & QA › Component & UI Testing	Frontend › Frontend Testing Testing & QA › Component & UI Testing	Testing & QA › Component & UI Testing

Weekly downloads over time

Hover for exact values; switch to log scale for tools of very different sizes.

jsdom
Testing Library
Storybook
happy-dom