What is the best open-source JavaScript library?

Our top pick is Bun: Fast JS runtime + bundler + package manager.

How many JavaScript open-source libraries are there?

Thousands exist on GitHub, but we've curated the top 8 that actually ship in production. Categorized by use case.

Is this list updated?

Yes — every pick is reviewed weekly. Star counts refresh daily via the GitHub API. Last review: 22 May 2026.

Awesome · 8 curated picks

Awesome JavaScript

Curated open-source JavaScript libraries in 2026. The modern JS ecosystem — frameworks, tooling, animation, testing — picked by builders for builders.

Runtime + Tooling

Bun

75k

oven-sh/bun

Fast JS runtime + bundler + package manager.

Vite

73k

vitejs/vite

The dev server + build tool that won.

Biome

19k

biomejs/biome

Fast formatter + linter in Rust.

Frameworks

Next.js

130k

vercel/next.js

React framework with App Router.

Astro

50k

withastro/astro

Content-first framework with zero JS by default.

Solid

33k

solidjs/solid

Fine-grained reactive JS framework.

Testing

Vitest

14k

vitest-dev/vitest

Vite-native test runner, Jest-compatible.

Playwright

67k

microsoft/playwright

Cross-browser E2E testing.

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