Top 10 JavaScript Utility Libraries in 2026

There was a time when Lodash was pretty much the only game in town. That's not the case anymore. TypeScript adoption has crossed the point of no return, which means libraries without first-class type support are falling behind. Bundle size now directly impacts Core Web Vitals, so you can't just throw in a heavy dependency without thinking about it. And ES2024+ has filled in enough gaps natively that libraries have to justify their existence more than they used to. With that in mind, here are 10 libraries that are actually seeing real production use in 2026. The ordering is loosely by priority, but it depends on what you're building, so take it as a rough guide. 1. es-toolkit npm install es-toolkit Weekly downloads ~8.5M · GitHub ★ 10.9K Built by the Toss team. Since launching in 2024, adoption has been growing fast, and it's already used in production by projects like Storybook, Recharts, ink, and CKEditor. Three things matter here. First, bundle size is about 97% smaller than Lodash,