Response: headers 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.

We'd love to hear more about your role and the company you work for
Please help us by answering a few questions.

Note: This feature is available in Web Workers.

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.

js
const myImage = document.querySelector("img");

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

fetch(myRequest)
  .then((response) => {
    console.log("response.headers =", response.headers);
    return response.blob();
  })
  .then((myBlob) => {
    const objectURL = URL.createObjectURL(myBlob);
    myImage.src = objectURL;
  });

Specifications

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

Browser compatibility

See also