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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.
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;
});
});