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.
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 |