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The Body mixin of the Fetch API represents the body of the response/request, allowing you to declare what its content type is and how it should be handled.

Body is implemented by both Request and Response. This provides these objects with an associated body (a stream), a used flag (initially unset), and a MIME type (initially the empty byte sequence).

Properties

Body.body Только для чтения
A simple getter used to expose a ReadableStream of the body contents.
Body.bodyUsed Только для чтения
A Boolean that indicates whether the body has been read.

Methods

Body.arrayBuffer()
Takes a Response stream and reads it to completion. It returns a promise that resolves with an ArrayBuffer.
Body.blob()
Takes a Response stream and reads it to completion. It returns a promise that resolves with a Blob.
Body.formData()
Takes a Response stream and reads it to completion. It returns a promise that resolves with a FormData object.
Body.json()
Takes a Response stream and reads it to completion. It returns a promise that resolves with the result of parsing the body text as JSON.
Body.text()
Takes a Response stream and reads it to completion. It returns a promise that resolves with a USVString (text). The response is always decoded using UTF-8.

Examples

The example below uses a simple fetch call to grab an image and display it in an <img> tag. You'll notice that since we are requesting an image, we need to run Body.blob() (Response implements body) to give the response its correct MIME type.

HTML Content

<img class="my-image" src="https://wikipedia.org/static/images/project-logos/frwiki-1.5x.png">

JS Content

var myImage = document.querySelector('.my-image');
fetch('https://upload.wikimedia.org/wikipedia/commons/7/77/Delete_key1.jpg')
	.then(res => res.blob())
	.then(res => {
		var objectURL = URL.createObjectURL(res);
		myImage.src = objectURL;
});

Specifications

Specification Status Comment
Fetch
Определение 'Body' в этой спецификации.
Живой стандарт  

Browser compatibility

ВозможностьChromeEdgeFirefoxInternet ExplorerOperaSafari
Базовая поддержка

42

411

Да

39

342

Нет29 Нет
body52 Да Нет3 Нет39 ?
bodyUsed

42

411

Да

39

342

Нет

29

284

Нет
arrayBuffer

42

411

Да

39

342

Нет

29

284

Нет
blob

42

411

Да

39

342

Нет

29

284

Нет
formData60 ?

39

342

Нет47 Нет
json

42

411

Да

39

342

Нет

29

284

Нет
text

42

411

Да

39

342

Нет

29

284

Нет
ВозможностьAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Базовая поддержка4242 ? ? Да Нет4.0
body5252 ? Нет339 ?6.0
bodyUsed Нет Нет Да Нет Нет Нет Нет
arrayBuffer Нет Нет Да Нет Нет Нет Нет
blob Нет Нет Да Нет Нет Нет Нет
formData6060 ? Нет47 Нет Нет
json Нет Нет Да Нет Нет Нет Нет
text Нет Нет Да Нет Нет Нет Нет

1. From version 41: this feature is behind the Experimental Web Platform Features preference. To change preferences in Chrome, visit chrome://flags.

2. From version 34: this feature is behind the dom.fetch.enabled preference. To change preferences in Firefox, visit about:config.

3. This feature is behind the dom.streams.enabled preference and the javascript.options.streams preference. To change preferences in Firefox, visit about:config.

4. From version 28: this feature is behind the Experimental Web Platform Features preference.

See also

 

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