The ok
read-only property of the Response
interface contains a Boolean stating whether the response was successful (status in the range 200-299) or not.
Syntax
var myOK = response.ok;
Value
A Boolean
.
Example
In our Fetch Response example (see Fetch Response live) we create a new Request
object using the Request()
constructor, passing it a JPG path. We then fetch this request using fetch()
, extract a blob from the response using Body.blob
, create an object URL out of it using URL.createObjectURL
, and display this in an <img>
.
Note: at the top of the fetch()
block we log the response ok
value to the console.
var myImage = document.querySelector('img'); var myRequest = new Request('flowers.jpg'); fetch(myRequest).then(function(response) { console.log(response.ok); // returns true if the response returned successfully response.blob().then(function(myBlob) { var objectURL = URL.createObjectURL(myBlob); myImage.src = objectURL; }); });
Specifications
Specification | Status | Comment |
---|---|---|
Fetch The definition of 'ok' in that specification. |
Living Standard | Initial definition |
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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
ok | Chrome
Full support
42
| Edge Full support 14 | Firefox
Full support
39
| IE No support No | Opera
Full support
29
| Safari Full support 10.1 | WebView Android No support No | Chrome Android No support No | Firefox Android No support No | Opera Android
Full support
29
| Safari iOS Full support 10.3 | Samsung Internet Android No support No |
Legend
- Full support
- Full support
- No support
- No support
- 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.