Response: ok property
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 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.
Value
A boolean value.
Examples
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 Response.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.
const myImage = document.querySelector("img"); const myRequest = new Request("flowers.jpg"); fetch(myRequest).then((response) => { console.log(response.ok); // returns true if the response returned successfully response.blob().then((myBlob) => { const objectURL = URL.createObjectURL(myBlob); myImage.src = objectURL; }); }); Specifications
| Specification |
|---|
| Fetch # ref-for-dom-response-ok② |