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Blob

The Blob interface represents a blob, which is a file-like object of immutable, raw data; they can be read as text or binary data, or converted into a ReadableStream so its methods can be used for processing the data.

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Extended by​

Methods​

arrayBuffer()​

arrayBuffer(): Promise<ArrayBuffer>;

The arrayBuffer() method of the Blob interface returns a Promise that resolves with the contents of the blob as binary data contained in an ArrayBuffer.

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Returns​

Promise<ArrayBuffer>

bytes()​

bytes(): Promise<Uint8Array<ArrayBuffer>>;

The bytes() method of the Blob interface returns a Promise that resolves with a Uint8Array containing the contents of the blob as an array of bytes.

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Returns​

Promise<Uint8Array<ArrayBuffer>>

slice()​

slice(
   start?, 
   end?, 
   contentType?
): Blob;

The slice() method of the Blob interface creates and returns a new Blob object which contains data from a subset of the blob on which it's called.

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Parameters​

ParameterType
start?number
end?number
contentType?string

Returns​

Blob

stream()​

stream(): ReadableStream<Uint8Array<ArrayBuffer>>;

The stream() method of the Blob interface returns a ReadableStream which upon reading returns the data contained within the Blob.

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Returns​

ReadableStream<Uint8Array<ArrayBuffer>>

text()​

text(): Promise<string>;

The text() method of the Blob interface returns a Promise that resolves with a string containing the contents of the blob, interpreted as UTF-8.

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Returns​

Promise<string>

Properties​

size​

readonly size: number;

The size read-only property of the Blob interface returns the size of the Blob or File in bytes.

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type​

readonly type: string;

The type read-only property of the Blob interface returns the MIME type of the file.

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