Jest
Delightful JavaScript testing
Jest is the most popular JavaScript testing framework with snapshot testing, mocking, and code coverage. Created by Meta. Being gradually replaced by Vitest in new projects.
Panel Reviews
The Builder
Developer Perspective
“Still the most used JS testing framework. Massive ecosystem of matchers, plugins, and documentation.”
The Skeptic
Reality Check
“Vitest does everything Jest does faster with better ESM support. New projects should start with Vitest.”
The Futurist
Big Picture
“Jest defined modern JS testing but Vitest is the future. The migration is happening steadily.”
Community Sentiment
“Still solid for legacy codebases but Vitest is eating its lunch in new projects”
“Jest's snapshot testing changed how I think about UI regression — even if I'm moving to Vitest”
“Vitest migration took 20 minutes and my test suite runs 3x faster now”
“The gold standard that set expectations for all other JS testing tools”