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
Read only- A simple getter used to expose a
ReadableStream
of the body contents. Body.bodyUsed
Read only- 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 anArrayBuffer
. Body.blob()
- Takes a
Response
stream and reads it to completion. It returns a promise that resolves with aBlob
. Body.formData()
- Takes a
Response
stream and reads it to completion. It returns a promise that resolves with aFormData
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 asJSON
. Body.text()
- Takes a
Response
stream and reads it to completion. It returns a promise that resolves with aUSVString
(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://udn.realityripple.com/samples/46/29059a2b39.png">
JS Content
const myImage = document.querySelector('.my-image'); fetch('https://upload.wikimedia.org/wikipedia/commons/7/77/Delete_key1.jpg') .then(res => res.blob()) .then(res => { const objectURL = URL.createObjectURL(res); myImage.src = objectURL; });
Specifications
Specification | Status | Comment |
---|---|---|
Fetch The definition of 'Body' in that specification. |
Living Standard |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Body | Chrome
Full support
42
| Edge Full support ≤18 | Firefox
Full support
39
| IE No support No | Opera
Full support
29
| Safari Full support 10 | WebView Android Full support 42 | Chrome Android Full support 42 | Firefox Android ? | Opera Android
Full support
29
| Safari iOS Full support 10 | Samsung Internet Android Full support 4.0 |
arrayBuffer | Chrome
Full support
42
| Edge Full support ≤18 | Firefox
Full support
39
| IE No support No | Opera
Full support
29
| Safari Full support 10 | WebView Android No support No | Chrome Android Full support 42 | Firefox Android No support No | Opera Android
Full support
29
| Safari iOS Full support Yes | Samsung Internet Android No support No |
blob | Chrome
Full support
42
| Edge Full support ≤18 | Firefox
Full support
39
| IE No support No | Opera
Full support
29
| Safari Full support 10 | WebView Android No support No | Chrome Android Full support 42 | Firefox Android No support No | Opera Android
Full support
29
| Safari iOS Full support 10 | Samsung Internet Android No support No |
body | Chrome Full support 52 | Edge Full support ≤18 | Firefox
Full support
65
| IE No support No | Opera Full support 39 | Safari Full support 10 | WebView Android Full support 52 | Chrome Android Full support 52 | Firefox Android
Full support
65
| Opera Android Full support 41 | Safari iOS Full support Yes | Samsung Internet Android Full support 6.0 |
bodyUsed | Chrome
Full support
42
| Edge Full support ≤18 | Firefox
Full support
39
| IE No support No | Opera
Full support
29
| Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android No support No | Opera Android
Full support
29
| Safari iOS No support No | Samsung Internet Android No support No |
formData | Chrome Full support 60 | Edge Full support ≤79 | Firefox
Full support
39
| IE No support No | Opera Full support 47 | Safari Full support 10 | WebView Android Full support 60 | Chrome Android Full support 60 | Firefox Android No support No | Opera Android Full support 44 | Safari iOS Full support Yes | Samsung Internet Android Full support 8.0 |
json | Chrome
Full support
42
| Edge Full support ≤18 | Firefox
Full support
39
| IE No support No | Opera
Full support
29
| Safari Full support 10 | WebView Android No support No | Chrome Android Full support 42 | Firefox Android No support No | Opera Android
Full support
29
| Safari iOS Full support 10 | Samsung Internet Android No support No |
text | Chrome
Full support
42
| Edge Full support ≤18 | Firefox
Full support
39
| IE No support No | Opera
Full support
29
| Safari Full support 10 | WebView Android No support No | Chrome Android Full support 42 | Firefox Android No support No | Opera Android
Full support
29
| Safari iOS Full support 10 | Samsung Internet Android No support No |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.
- User must explicitly enable this feature.