# it-split

> Splits Uint8Arrays emitted by an (async) iterable by a delimiter

Latest version **4.0.0** (published 2026-05-08) · Apache-2.0 OR MIT license · 0 weekly downloads

## Install

```sh
npm install it-split
pnpm add it-split
yarn add it-split
bun add it-split
```

## Health

**Score 70/100 (B)** — status: active.

Positive: has types; esm support; no vulnerabilities; has provenance; high maintenance score; high quality score.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 4.0.0 |
| Published | 2026-05-08 |
| First published | 2021-07-10 |
| Weekly downloads | 0 |
| License | Apache-2.0 OR MIT |
| TypeScript types | bundled |
| Module format | ESM |
| Dependencies | 1 |
| Unpacked size | 58.1 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 283 |
| Author | Alex Potsides |
| Maintainers | achingbrain |

## Links

- npm: https://www.npmjs.com/package/it-split
- Repository: https://github.com/achingbrain/it
- Homepage: https://github.com/achingbrain/it/tree/main/packages/it-split#readme
- Issues: https://github.com/achingbrain/it/issues
- npm.io page: https://npm.io/package/it-split

## Dependencies (1)

- [uint8arraylist](https://npm.io/package/uint8arraylist.md) ^3.0.1

## Recent versions

- 4.0.0 (latest) — 2026-05-08
- 3.0.12 — 2026-04-10
- 3.0.11 — 2026-04-10
- 3.0.10 — 2025-06-01
- 3.0.9 — 2025-05-13
- 3.0.8 — 2025-03-06
- 3.0.7 — 2024-05-26
- 3.0.6 — 2024-04-24
- 3.0.5 — 2023-12-11
- 3.0.4 — 2023-11-15
- 3.0.3 — 2023-08-16
- 3.0.2 — 2023-05-09
- 3.0.1 — 2023-03-31
- 3.0.0 — 2023-03-30
- 2.0.2 — 2023-03-02
- … 7 more at https://npm.io/package/it-split/versions

## README

# it-split

[![codecov](https://img.shields.io/codecov/c/github/achingbrain/it.svg?style=flat-square)](https://codecov.io/gh/achingbrain/it)
[![CI](https://img.shields.io/github/actions/workflow/status/achingbrain/it/js-test-and-release.yml?branch=main\&style=flat-square)](https://github.com/achingbrain/it/actions/workflows/js-test-and-release.yml?query=branch%3Amain)

> Splits Uint8Arrays emitted by an (async) iterable by a delimiter

# About

<!--

!IMPORTANT!

Everything in this README between "# About" and "# Install" is automatically
generated and will be overwritten the next time the doc generator is run.

To make changes to this section, please update the @packageDocumentation section
of src/index.js or src/index.ts

To experiment with formatting, please run "npm run docs" from the root of this
repo and examine the changes made.

-->

Searches `Uint8Array`s emitted by an (async)iterable for a delimiter and yields chunks split by that delimiter.

## Example

```javascript
import split from 'it-split'

const encoder = new TextEncoder()

// This can also be an iterator, generator, etc
const values = [
  encoder.encode('hello\nwor'),
  encoder.encode('ld')
]

const arr = all(split(values))

console.info(arr) // [encoder.encode('hello'), encoder.encode('world')]
```

You can also split by arbitrary delimiters:

```javascript
const values = [
  Uint8Array.from([0, 1, 2, 3]),
  Uint8Array.from([0, 1, 2, 3]),
  Uint8Array.from([1, 1, 2])
]
const delimiter = Uint8Array.from([1, 2])

const arr = all(split(values, {
  delimiter
}))

console.info(arr) // [ Buffer.from([0]), Buffer.from([3, 0]), Buffer.from([3, 1]) ]
```

Async sources must be awaited:

```javascript
import split from 'it-split'

const encoder = new TextEncoder()

const values = async function * () {
  yield * [
    encoder.encode('hello\nwor'),
    encoder.encode('ld')
  ]
}

const arr = await all(split(values()))

console.info(arr) // [encoder.encode('hello'), encoder.encode('world')]
```

# Install

```console
$ npm i it-split
```

## Browser `<script>` tag

Loading this module through a script tag will make its exports available as `ItSplit` in the global namespace.

```html
<script src="https://unpkg.com/it-split/dist/index.min.js"></script>
```

# API Docs

- <https://achingbrain.github.io/it/modules/it-split.html>

# License

Licensed under either of

- Apache 2.0, ([LICENSE-APACHE](https://github.com/achingbrain/it/blob/main/packages/it-split/LICENSE-APACHE) / <http://www.apache.org/licenses/LICENSE-2.0>)
- MIT ([LICENSE-MIT](https://github.com/achingbrain/it/blob/main/packages/it-split/LICENSE-MIT) / <http://opensource.org/licenses/MIT>)

# Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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