SecurityPolicyViolationEvent: violatedDirective property

The violatedDirective read-only property of the SecurityPolicyViolationEvent interface is a string representing the Content Security Policy (CSP) directive that was violated.

This is a historical alias of SecurityPolicyViolationEvent.effectiveDirective, and has the same value.

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