es-toolkit

es-toolkit · [](https://github.com/toss/slash/blob/main/LICENSE) [](https://codecov.io/gh/toss/es-toolkit) [](https://www.npmjs.com/package/es-toolkit) [](https://jsr.io/@es-toolkit/es-toolkit) [](https://discord.gg/vGXbVjP2nY)

English | [한국어](https://github.com/toss/es-toolkit/blob/main/README-ko_kr.md) | [简体中文](https://github.com/toss/es-toolkit/blob/main/README-zh_hans.md) | [日本語](https://github.com/toss/es-toolkit/blob/main/README-ja_jp.md)

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, delay, chunk, sum, and pick.
• Designed with performance in mind, es-toolkit achieves 2-3× better performance in modern JavaScript environments.
• es-toolkit supports tree shaking out of the box, and reduces JavaScript code by up to 97% compared to other libraries.
• es-toolkit offers a complete compatibility layer to seamlessly replace lodash, available as es-toolkit/compat.
• es-toolkit includes built-in TypeScript support, with straightforward yet robust types. It also provides useful type guards such as isNotNil.

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