This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage 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 specification changes.
The referrerPolicy
read-only property of the Request
interface contains the referrer policy governing the referrer for the request.
Note: The referrer is set in the HTTP Referer header, see the Referrer policy spec for more details about referrer policy.
Syntax
var myReferrerPolicy = request.referrerPolicy;
Value
A DOMString
representing the request's referrerPolicy
, as defined in ReffererPolicy
. Possible values are:
- An empty string if there is no referrer policy set.
no-referrer
no-referrer-when-downgrade
origin-only
origin-when-cross-origin
unsafe-url
Example
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 referrer policy in a variable:
var myRequest = new Request('flowers.jpg'); var myReferrer = myRequest.referrerPolicy; // returns "" by default
Specifications
Specification | Status | Comment |
---|---|---|
Fetch The definition of 'referrerPolicy' in that specification. |
Living Standard | Initial definition |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | ? | 47 (47) | No support |
? |
No support |
Feature | Android | Firefox Mobile (Gecko) | Firefox OS (Gecko) | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | ? | ? | No support | No support | No support | No support | ? |