HTMLAreaElement: referrerPolicy property - Web APIs | MDN (original) (raw)

Baseline Widely available

The**HTMLAreaElement.referrerPolicy** property reflect the HTML referrerpolicy attribute of the element defining which referrer is sent when fetching the resource.

Value

A string; one of the following:

no-referrer

The Referer header will be omitted entirely. No referrer information is sent along with requests.

no-referrer-when-downgrade

The URL is sent as a referrer when the protocol security level stays the same (e.g.HTTP→HTTP, HTTPS→HTTPS), but isn't sent to a less secure destination (e.g. HTTPS→HTTP).

origin

Only send the origin of the document as the referrer in all cases. The document https://example.com/page.html will send the referrerhttps://example.com/.

origin-when-cross-origin

Send a full URL when performing a same-origin request, but only send the origin of the document for other cases.

same-origin

A referrer will be sent for same-site origins, but cross-origin requests will contain no referrer information.

strict-origin

Only send the origin of the document as the referrer when the protocol security level stays the same (e.g. HTTPS→HTTPS), but don't send it to a less secure destination (e.g. HTTPS→HTTP).

strict-origin-when-cross-origin (default)

This is the user agent's default behavior if no policy is specified. Send a full URL when performing a same-origin request, only send the origin when the protocol security level stays the same (e.g. HTTPS→HTTPS), and send no header to a less secure destination (e.g. HTTPS→HTTP).

unsafe-url

Send a full URL when performing a same-origin or cross-origin request. This policy will leak origins and paths from TLS-protected resources to insecure origins. Carefully consider the impact of this setting.

Examples

<img usemap="#mapAround" width="100" height="100" src="/img/logo@2x.png" />
<map id="myMap" name="mapAround" />>

const elt = document.createElement("area");
elt.href = "/img2.png";
elt.shape = "rect";
elt.referrerPolicy = "no-referrer";
elt.coords = "0,0,100,100";
const map = document.getElementById("myMap");

map.appendChild(elt);
// When clicked, the area's link will not send a referrer header.

Specifications

Specification
HTML Standard # dom-area-referrerpolicy

Browser compatibility