es-toolkit is a state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.
- es-toolkit offers a variety of everyday utility functions with modern implementations, such as [debounce](https://es-toolkit.slash.page/reference/function/debounce.html), [delay](https://es-toolkit.slash.page/reference/promise/delay.html), [chunk](https://es-toolkit.slash.page/reference/array/chunk.html), [sum](https://es-toolkit.slash.page/reference/math/sum.html), and [pick](https://es-toolkit.slash.page/reference/object/pick.html).
- Designed with performance in mind, es-toolkit achieves [2-3× better performance](https://es-toolkit.slash.page/performance.html) in modern JavaScript environments.
- es-toolkit supports tree shaking out of the box, and [reduces JavaScript code by up to 97%](https://es-toolkit.slash.page/bundle-size.html) compared to other libraries.
- es-toolkit includes built-in TypeScript support, with straightforward yet robust types. It also provides useful type guards such as [isNotNil](https://es-toolkit.slash.page/reference/predicate/isNotNil.html).
- es-toolkit is battle-tested with 100% test coverage, ensuring reliability and robustness.
## Contributing
We welcome contribution from everyone in the community. Read below for detailed contribution guide.
