Delightful JavaScript Testing.
Jest is delightful JavaScript Testing. Licensed under MIT, it is extremely popular in the JavaScript ecosystem with 44.0M weekly downloads.
Jest has an excellent overall health score of 86/100. Its strongest dimension is popularity (100/100), while stability (70/100) is the area with most room for improvement. This package is well-maintained and actively used.
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Jest vs Vitest in 2026: Vitest is 20x faster thanks to Vite-native transforms. Compare config complexity, TS support, snapshot testing, and when to migrate.
2026-04-13T00:00:00.000ZVitest 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.
2026-03-18T00:00:00.000Z