This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
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. |
Editor's Draft | Added the referrerPolicy property. |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 51 | ? | 50.0 (50.0) [1] | ? | 38 | ? |
Feature | Android Webview | Chrome for Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | 51 | 51 | 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
.