A modern JavaScript utility library that's 2-3 times faster and up to 97% smaller—a major upgrade to lodash.
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Ben Hollis c341e1919a
fix(sumBy): Remove array allocation from sumBy (#753)
* Remove array allocation from sumBy

* Update sum.ts

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Co-authored-by: Sojin Park <raon0211@gmail.com>
2024-10-26 17:20:02 +09:00
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src fix(sumBy): Remove array allocation from sumBy (#753) 2024-10-26 17:20:02 +09:00
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tsconfig.json chore: Fix type errors 2024-09-08 17:54:22 +09:00
vitest.config.mts chore(coverage): exclude test files in coverage processes (#696) 2024-10-09 11:48:02 +09:00
yarn.lock refactor: add a eslint rule restricting Object.entries and update prettier-plugin-sort-re-exports (#674) 2024-10-06 20:57:02 +09:00

es-toolkit · MIT License codecov NPM badge JSR badge Discord Badge

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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 includes built-in TypeScript support, with straightforward yet robust types. It also provides useful type guards such as isNotNil.
  • es-toolkit is utilized by several popular open-source libraries, such as Storybook and ink.
  • es-toolkit is battle-tested with 100% test coverage, ensuring reliability and robustness.

Examples

// 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

License

MIT © Viva Republica, Inc. See LICENSE for details.

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