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Class Blob

A Blob encapsulates immutable, raw data that can be safely shared across multiple worker threads.

since

v15.7.0, v14.18.0

experimental

Hierarchy

  • Blob

Index

Constructors

Properties

Methods

Constructors

constructor

  • 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

    Returns Blob

Properties

Readonly size

size: number

The total size of the Blob in bytes.

since

v15.7.0, v14.18.0

Readonly type

type: string

The content-type of the Blob.

since

v15.7.0, v14.18.0

Methods

arrayBuffer

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

    since

    v15.7.0, v14.18.0

    Returns Promise<ArrayBuffer>

slice

  • slice(start?: number, end?: number, type?: string): Blob

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

    since

    v15.7.0, v14.18.0

    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

stream

  • stream(): unknown

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

    since

    v16.7.0

    Returns unknown

text

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

    since

    v15.7.0, v14.18.0

    Returns Promise<string>

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