Request: blob() method

Note: This feature is available in Web Workers.

The blob() method of the Request interface reads the request body and returns it as a promise that resolves with a Blob.

Syntax

blob()

Parameters

None.

Return value

A promise that resolves with a Blob whose data is the body's bytes and the media type is the request's Content-Type header's value.

Exceptions

TypeError

Thrown for one of the following reasons:

The request body is disturbed or locked.
There was an error decoding the body content (for example, because the Content-Encoding header is incorrect).

Examples

const obj = { hello: "world" };
const myBlob = new Blob([JSON.stringify(obj, null, 2)], {
  type: "application/json",
});

const request = new Request("/myEndpoint", {
  method: "POST",
  body: myBlob,
});

request.blob().then((myBlob) => {
  // do something with the blob sent in the request
});

Specifications

Fetch