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Response: ok property

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

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
ok 42 14 39 No 29 10.1 42 42 39 29 10.3 4.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Response/ok