Response.headers

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.

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

Syntax

var myHeaders = response.headers;

Value

A Headers object.

Example

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 Body.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 value to the console.

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

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

fetch(myRequest).then(function(response) {
  console.log(response.headers); // returns a Headers{} object
  response.blob().then(function(myBlob) {
    var objectURL = URL.createObjectURL(myBlob);
    myImage.src = objectURL;
  });
});

Specifications

Specification	Status	Comment
Fetch The definition of 'headers' in that specification.	Living Standard	Initial definition

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	42 41^[1]	39 (39) 34^[1]	Not supported	29 28^[1]	Not supported

Feature	Android	Firefox Mobile (Gecko)	Firefox OS (Gecko)	IE Phone	Opera Mobile	Safari Mobile	Chrome for Android
Basic support	Not supported	Not supported	Not supported	Not supported	Not supported	Not supported	Not supported

[1] This feature is implemented behind a preference.

Response.headers

Syntax

Value

Example

Specifications

Browser compatibility

See also

Document Tags and Contributors