# es-toolkit > A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations. Latest version **1.52.0** (published 2026-08-28) · MIT license · 0 weekly downloads ## Install ```sh npm install es-toolkit pnpm add es-toolkit yarn add es-toolkit bun add es-toolkit ``` ## Health **Score 80/100 (A)** — status: active. Positive: has types; esm support; no vulnerabilities; has provenance; recently updated; high maintenance score; high quality score; popular repo. Warnings: low downloads. ## Facts | | | |---|---| | Version | 1.52.0 | | Published | 2026-08-28 | | First published | 2024-05-23 | | Weekly downloads | 0 | | License | MIT | | TypeScript types | bundled | | Module format | ESM + CommonJS | | Dependencies | 0 | | Unpacked size | 4 MB | | Known vulnerabilities | 0 | | Install scripts | no | | Provenance | attested (GitHub Actions) | | GitHub stars | 11346 | | Maintainers | toss-build-bot, raon0211, toss-public | ## Links - npm: https://www.npmjs.com/package/es-toolkit - Repository: https://github.com/toss/es-toolkit - Homepage: https://es-toolkit.dev - Issues: https://github.com/toss/es-toolkit/issues - npm.io page: https://npm.io/package/es-toolkit ## Recent versions - 1.52.0 (latest) — 2026-08-28 - 1.52.0-dev.2116 (dev) — 2026-09-19 - 1.0.2-canary.0 (canary) — 2024-06-03 - 1.52.0-dev.2115 — 2026-09-17 - 1.52.0-dev.2114 — 2026-09-17 - 1.52.0-dev.2113 — 2026-09-17 - 1.52.0-dev.2111 — 2026-09-16 - 1.52.0-dev.2112 — 2026-09-16 - 1.52.0-dev.2110 — 2026-09-15 - 1.52.0-dev.2109 — 2026-09-15 - 1.52.0-dev.2108 — 2026-09-13 - 1.52.0-dev.2107 — 2026-09-11 - 1.52.0-dev.2106 — 2026-09-10 - 1.52.0-dev.2105 — 2026-09-10 - 1.52.0-dev.2104 — 2026-09-10 - … 1771 more at https://npm.io/package/es-toolkit/versions ## README ![](./docs/public/og.png) # es-toolkit · [![MIT License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/toss/es-toolkit/blob/main/LICENSE) [![codecov](https://codecov.io/gh/toss/es-toolkit/graph/badge.svg?token=8N5S3AR3C7)](https://codecov.io/gh/toss/es-toolkit) [![NPM badge](https://img.shields.io/npm/v/es-toolkit?logo=npm)](https://www.npmjs.com/package/es-toolkit) [![JSR badge](https://jsr.io/badges/@es-toolkit/es-toolkit)](https://jsr.io/@es-toolkit/es-toolkit) [![Discord Badge](https://discord.com/api/guilds/1281071127052943361/widget.png?style=shield)](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](https://es-toolkit.dev/reference/function/debounce.html), [delay](https://es-toolkit.dev/reference/promise/delay.html), [chunk](https://es-toolkit.dev/reference/array/chunk.html), [sum](https://es-toolkit.dev/reference/math/sum.html), and [pick](https://es-toolkit.dev/reference/object/pick.html). - Designed with performance in mind, es-toolkit achieves [2-3× better performance](https://es-toolkit.dev/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.dev/bundle-size.html) compared to other libraries. - es-toolkit offers a complete compatibility layer to seamlessly replace Lodash, available as [es-toolkit/compat](https://es-toolkit.dev/compatibility.html). - es-toolkit includes built-in TypeScript support, with straightforward yet robust types. It also provides useful type guards such as [isNotNil](https://es-toolkit.dev/reference/predicate/isNotNil.html). - es-toolkit is trusted and used by popular open-source projects like [Storybook](https://github.com/storybookjs/storybook/blob/9d862798d666678cc4822e857c00bbd744169ced/code/core/package.json#L358), [Recharts](https://github.com/recharts/recharts/blob/0fa4cc325da403b6fa1c6be0f820896ed92f806a/package.json#L94), [ink](https://github.com/vadimdemedes/ink/blob/2090ad9779be59dea71d173eb49785b7bd4495d0/package.json#L55), and [CKEditor](https://github.com/ckeditor/ckeditor5/blob/60d5fac804643cb4d359767ee2f94e3d92d1fcc5/packages/ckeditor5-core/package.json#L53). - es-toolkit is battle-tested with 100% test coverage, ensuring reliability and robustness. ## Examples ```tsx // import from '@es-toolkit/es-toolkit' in jsr. import { chunk, debounce } from 'es-toolkit'; const debouncedLog = debounce(message => { console.log(message); }, 300); // This call will be debounced debouncedLog('Hello, world!'); const array = [1, 2, 3, 4, 5, 6]; const chunkedArray = chunk(array, 2); console.log(chunkedArray); // Output: [[1, 2], [3, 4], [5, 6]] ``` ## AI Integration es-toolkit provides [Agent Skills](https://skills.sh) for AI coding tools like Claude Code, Cursor, and Copilot. ```bash npx skills add toss/es-toolkit ``` For Claude Code, you can also install via the plugin marketplace: ``` /plugin marketplace add toss/es-toolkit /plugin install es-toolkit@es-toolkit-plugin ``` For more details, see the [AI Integration guide](https://es-toolkit.dev/ai-integration.html). ## Contributing We welcome contributions from everyone in the community. Read below for a detailed contribution guide. [CONTRIBUTING](https://github.com/toss/es-toolkit/blob/main/.github/CONTRIBUTING.md) ## License MIT © Viva Republica, Inc. See [LICENSE](./LICENSE) for details. Toss --- _Source: https://npm.io/package/es-toolkit · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._