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TBodyInit
Bun

type

BodyInit

type BodyInit = ReadableStream | Bun.XMLHttpRequestBodyInit | AsyncIterable<string | ArrayBuffer | ArrayBufferView> | AsyncGenerator<string | ArrayBuffer | ArrayBufferView> | () => AsyncGenerator<string | ArrayBuffer | ArrayBufferView> | Image

Referenced types

class ReadableStream<R = any>

This Streams API interface represents a readable stream of byte data. The Fetch API offers a concrete instance of a ReadableStream through the body property of a Response object.

MDN Reference

class ArrayBuffer

Represents a raw buffer of binary data, which is used to store data for the different typed arrays. ArrayBuffers cannot be read from or written to directly, but can be passed to a typed array or DataView Object to interpret the raw buffer as needed.

  • readonly [Symbol.toStringTag]: string
  • readonly byteLength: number

    Read-only. The length of the ArrayBuffer (in bytes).

  • newByteLength?: number
    ): void;

    Resizes the ArrayBuffer to the specified size (in bytes).

    MDN

    byteLength: number

    Resize an ArrayBuffer in-place.

  • begin: number,
    end?: number

    Returns a section of an ArrayBuffer.

  • newByteLength?: number

    Creates a new ArrayBuffer with the same byte content as this buffer, then detaches this buffer.

    MDN

  • newByteLength?: number

    Creates a new non-resizable ArrayBuffer with the same byte content as this buffer, then detaches this buffer.

    MDN

type ArrayBufferView<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> = NodeJS.TypedArray<TArrayBuffer> | DataView<TArrayBuffer>

namespace Image

  • interface ConstructorOptions

    • autoOrient?: boolean

      Apply EXIF Orientation (JPEG) before any other operation.

    • maxPixels?: number

      Reject inputs whose width × height exceeds this many pixels. The check runs after the header is read but before any pixel buffer is allocated, so a tiny file claiming a huge canvas is refused cheaply.

  • interface Metadata

  • interface ModulateOptions

    • brightness?: number

      Multiplier; 1 leaves brightness unchanged.

    • saturation?: number

      0 = greyscale, 1 = unchanged, >1 = more saturated.

  • interface ResizeOptions

    • filter?: Filter

      Resampling kernel.

    • fit?: 'fill' | 'inside'

      "fill" stretches to exactly width×height. "inside" preserves aspect ratio so the result fits within width×height.

    • withoutEnlargement?: boolean

      Never upscale — if the source is already smaller, leave it.

  • type ErrorCode = 'ERR_IMAGE_FORMAT_UNSUPPORTED' | 'ERR_IMAGE_TOO_MANY_PIXELS' | 'ERR_IMAGE_DECODE_FAILED' | 'ERR_IMAGE_ENCODE_FAILED' | 'ERR_IMAGE_UNKNOWN_FORMAT' | 'ERR_INVALID_STATE'

    Stable error.code values set on rejections from Bun.Image terminals. Branch on these instead of parsing the message.

    • ERR_IMAGE_FORMAT_UNSUPPORTED — the requested format isn't available on this machine (HEIC/AVIF without the OS codec, TIFF on Linux). Catch this to fall back to a portable format.
    • ERR_IMAGE_TOO_MANY_PIXELS — header dimensions or resize output exceed maxPixels, or a path-backed input is over the 256 MiB cap.
    • ERR_IMAGE_DECODE_FAILED / ERR_IMAGE_ENCODE_FAILED — codec error.
    • ERR_IMAGE_UNKNOWN_FORMAT — input bytes didn't match any sniffer.
    • ERR_INVALID_STATE — the input ArrayBuffer was transferred between construction and the terminal call.
    • File-backed inputs surface the underlying syscall code (ENOENT, EACCES, …) directly.
  • type Filter = 'nearest' | 'box' | 'bilinear' | 'linear' | 'cubic' | 'mitchell' | 'lanczos2' | 'lanczos3' | 'mks2013' | 'mks2021'
  • type Format = 'jpeg' | 'png' | 'webp' | 'heic' | 'avif' | 'bmp' | 'tiff' | 'gif'

    bmp/tiff/gif are decode-only — metadata().format may report them but there are no .bmp()/.tiff()/.gif() encoder methods. tiff decode rejects with error.code === "ERR_IMAGE_FORMAT_UNSUPPORTED" on Linux; gif decodes the first frame everywhere.