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base on A modern JavaScript utility library that's 2-3 times faster and up to 97% smaller—a major upgrade to lodash. 
# 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](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 utilized by several popular open-source libraries, such as [Storybook](https://github.com/storybookjs/storybook/blob/9d862798d666678cc4822e857c00bbd744169ced/code/core/package.json#L358) and [ink](https://github.com/vadimdemedes/ink/blob/2090ad9779be59dea71d173eb49785b7bd4495d0/package.json#L55).
- 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]]
```
## Contributing
We welcome contribution from everyone in the community. Read below for 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.
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", Assign "at most 3 tags" to the expected json: {"id":"11423","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"