Response.headers

The headers read-only property of the Response interface contains the Headers object associated with the response.

Value

A Headers object.

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 that at the top of the fetch() block, we log the response headers to the console.

const myImage = document.querySelector('img');

const myRequest = new Request('flowers.jpg');

fetch(myRequest).then((response) => {
  // for each response header, log an array with header name as key
  console.log(...response.headers);
  response.blob().then((myBlob) => {
    const objectURL = URL.createObjectURL(myBlob);
    myImage.src = objectURL;
  });
});

Specifications

Specification
Fetch Standard
# ref-for-dom-response-headers①

Browser compatibility

BCD tables only load in the browser

See also