Next generation testing framework powered by Vite
Vitest is next generation testing framework powered by Vite. Licensed under MIT, it is extremely popular in the JavaScript ecosystem with 43.0M weekly downloads.
Vitest has an excellent overall health score of 85/100. Its strongest dimension is maintenance (100/100), while quality (50/100) is the area with most room for improvement. This package is well-maintained and actively used.
Learn property-based testing with fast-check in JavaScript and TypeScript. Covers arbitraries, shrinking, Vitest integration, and real-world patterns.
2026-03-29T00:00:00.000ZVitest 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