The
HTMLAnchorElement.referrerPolicy
property reflect the HTML referrerpolicy attribute of the
<a> element defining which referrer is sent when fetching the resource.
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).
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/.
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).
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).
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.
const elt = document.createElement("a");
const linkText = document.createTextNode("My link");
elt.appendChild(linkText);
elt.href = "https://developer.mozilla.org/en-US/";
elt.referrerPolicy = "no-referrer";
const div = document.getElementById("divAround");
div.appendChild(elt); // When clicked, the link will not send a referrer header.
