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.

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.

js
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 Standard
# ref-for-dom-response-ok②

Browser compatibility

BCD tables only load in the browser

See also