The credentials read-only property of the Request interface indicates whether the user agent should send cookies from the other domain in the case of cross-origin requests. This is similar to XHR’s withCredentials flag, but with three available values (instead of two):

  • omit: Never send cookies.
  • same-origin: Send cookies if the URL is on the same origin as the calling script.
  • include: Always send cookies, even for cross-origin calls.


var myCred = request.credentials;


A RequestCredentials value.


In the following snippet, we create a new request using the Request.Request() constructor (for an image file in the same directory as the script), then save the request credentials in a variable:

var myRequest = new Request('flowers.jpg');
var myCred = myRequest.credentials; // returns "omit" by default


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

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 42
(Yes) 39 (39)
No support


No support
Feature Android Edge Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support No support (Yes) No support No support No support No support No support No support

[1] This feature is implemented behind a preference.

See also

Document Tags and Contributors

 Contributors to this page: katsuraku, chrisdavidmills, abbycar, Sebastianz, jpmedley, kscarfone
 Last updated by: katsuraku,