Request: referrer property

{{APIRef("Fetch API")}}{{AvailableInWorkers}}

The referrer read-only property of the {{domxref("Request")}} interface is set by the user agent to be the referrer of the Request. (e.g., client, no-referrer, or a URL.)

[!NOTE] If referrer's value is no-referrer, it returns an empty string.

Value

A string representing the request's referrer.

Examples

In the following snippet, we create a new request using the {{domxref("Request.Request", "Request()")}} constructor (for an image file in the same directory as the script), then save the request referrer in a variable:

const myRequest = new Request("flowers.jpg");
const myReferrer = myRequest.referrer; // returns "about:client" by default

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• ServiceWorker API
• HTTP access control (CORS)
• HTTP