Delightful JavaScript Testing.
Jest is delightful JavaScript Testing. Licensed under MIT, it is extremely popular in the JavaScript ecosystem with 43.5M weekly downloads.
Jest has an excellent overall health score of 92/100. Its strongest dimension is maintenance (100/100), while stability (70/100) is the area with most room for improvement. This package is well-maintained and actively used.
Vitest vs Jest 2026: benchmark results across 10 real-world repos. Vitest is 3-8x faster on Vite projects. See full feature matrix and migration guide.
2026-03-28T00:00:00.000ZVitest 3 and Jest 30 compared: speed benchmarks, configuration, TypeScript support, browser mode, and a step-by-step migration guide for 2026 projects.
2026-03-18T00:00:00.000ZReal benchmarks on JavaScript test runners. Bun test, Vitest, and Jest compared on speed, coverage, API compatibility, and TypeScript support in 2026.
2026-03-09T00:00:00.000Z