Request.referrer
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 referrer
read-only property of the Request
interface is set by the user agent to be the referrer of the Request. (e.g., about:client
, no-referrer
, or a URL.)
Note: If referrer
's value is no-referrer
, it returns an empty string.
Syntax
var <var>myReferrer</var> = <var>request</var>.referrer;
Value
A DOMString
representing the request's referrer.
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 in a variable:
var myRequest = new Request('flowers.jpg'); var myReferrer = myRequest.referrer; // returns "about:client" by default
Specifications
Specification | Status | Comment |
---|---|---|
Fetch The definition of 'referrer' in that specification. |
Living Standard | Initial definition |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 42 41[1] |
47 (47) | No support |
29 |
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 | No support | No support | No support |
[1] This feature is implemented behind a preference.
See also
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/request/referrer