mirror of
https://github.com/oven-sh/bun
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23 lines
810 B
Markdown
23 lines
810 B
Markdown
---
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name: Read a file to a Uint8Array
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---
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The `Bun.file()` function accepts a path and returns a `BunFile` instance. The `BunFile` class extends `Blob` and allows you to lazily read the file in a variety of formats.
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To read the file into a `Uint8Array` instance, retrieve the contents of the `BunFile` as an `ArrayBuffer` with `.arrayBuffer()`, then pass it into the `Uint8Array` constructor.
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```ts
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const path = "/path/to/package.json";
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const file = Bun.file(path);
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const arrBuffer = await file.arrayBuffer();
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const byteArray = new Uint8Array(arrBuffer);
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byteArray[0]; // first byteArray
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byteArray.length; // length of byteArray
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```
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---
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Refer to [API > Binary data > Typed arrays](/docs/api/binary-data#typedarray) for more information on working with `Uint8Array` and other binary data formats in Bun.
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