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 HTMLImageElement.referrerPolicy property reflect the HTML referrerpolicy attribute of the <img> element defining which referrer is sent when fetching the resource.
Syntax
refStr = imgElt.referrerPolicy; imgElt.referrerPolicy = refStr;
Values
-
"no-referrer"meaning that theReferer:HTTP header will not be sent."origin"meaning that the referrer will be the origin of the page, that is roughly the scheme, the host and the port."unsafe-url"meaning that the referrer will include the origin and the path (but not the fragment, password, or username). This case is unsafe as it can leak path information that has been concealed to third-party by using TLS.
Examples
var img = new Image();
img.src = "img/logo.png";
img.referrerPolicy = "origin";
var div = document.getElementById("divAround");
div.appendChild(img); // Fetch the image using the origin as the referrer
Specifications
| Specification | Status | Comment |
|---|---|---|
| Referrer Policy The definition of 'referrerPolicy attribute' in that specification. |
Working Draft | Added the referrerPolicy property. |
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | ? | ? | 50.0 (50.0) [1] | ? | ? | ? |
| Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | ? | 50.0 (50.0) [1] | ? | ? | ? |
[1] From Firefox 45 to 50, this was behind the network.http.enablePerElementReferrer preference. From Firefox 42 to 44 include this property was called referrer.