W3cubDocs

/Web APIs

Request: blob() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨March 2017⁩.

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.

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

Specification
Fetch> # ref-for-dom-body-blob①>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`blob`	42	14	39	29	10.1	42	39	29	10.3	4.0	42	10.3