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web api instance property

HTMLAreaElement: referrerPolicy property

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The HTMLAreaElement.referrerPolicy property reflect the HTML referrerpolicy attribute of the <area> 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 referrer https://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="#my-map" width="100" height="100" src="/img/logo@2x.png" />
<map id="my-map" name="my-map"></map>

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("my-map");

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

Specifications

SpecificationsStandards references are available on the canonical MDN page.

Browser compatibility

Browser compatibilityCompatibility data is available on the canonical MDN page.

See also