SecurityPolicyViolationEvent: referrer property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since October 2018.

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Note: This feature is available in Web Workers.

The referrer read-only property of the SecurityPolicyViolationEvent interface is a string representing the referrer for the resources whose Content Security Policy (CSP) was violated. This will be a URL or null.

Value

A string representing the URL for the referrer of the resources whose policy was violated, or null.

document.addEventListener("securitypolicyviolation", (e) => {
  console.log(e.referrer);
});

Specification
Content Security Policy Level 3 # dom-securitypolicyviolationevent-referrer