Class Blob

constructor

• new Blob(sources, options?): Blob

• Creates a new Blob object containing a concatenation of the given sources.

  {ArrayBuffer}, {TypedArray}, {DataView}, and {Buffer} sources are copied into the 'Blob' and can therefore be safely modified after the 'Blob' is created.

  String sources are also copied into the Blob.

  Parameters

  • sources: (ArrayBuffer | Blob | BinaryLike)[]
  • Optional options: BlobOptions

  Returns Blob

Readonly size

Readonly type

arrayBuffer

• arrayBuffer(): Promise<ArrayBuffer>

• Returns a promise that fulfills with an ArrayBuffer containing a copy of the Blob data.

  Returns Promise<ArrayBuffer>

  Since

  v15.7.0, v14.18.0

bytes

• bytes(): Promise<Uint8Array>

• The blob.bytes() method returns the byte of the Blob object as a Promise<Uint8Array>.

  const blob = new Blob(['hello']);
  blob.bytes().then((bytes) => {
    console.log(bytes); // Outputs: Uint8Array(5) [ 104, 101, 108, 108, 111 ]
  });
  Copy

  Returns Promise<Uint8Array>

  Since

  v20.16.0

slice

• slice(start?, end?, type?): Blob

• Creates and returns a new Blob containing a subset of this Blob objects data. The original Blob is not altered.

  Parameters

  • Optional start: number

    The starting index.
  • Optional end: number

    The ending index.
  • Optional type: string

    The content-type for the new Blob

  Returns Blob

  Since

  v15.7.0, v14.18.0

stream

• stream(): ReadableStream<any>

• Returns a new ReadableStream that allows the content of the Blob to be read.

  Returns ReadableStream<any>

  Since

  v16.7.0

text

• text(): Promise<string>

• Returns a promise that fulfills with the contents of the Blob decoded as a UTF-8 string.

  Returns Promise<string>

  Since

  v15.7.0, v14.18.0