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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The originalPolicy read-only property of the SecurityPolicyViolationEvent interface is a DOMString containing the policy whose enforcement uncovered the violation.


let origPolicy = violationEventInstance.originalPolicy;


A DOMString representing the policy whose enforcement uncovered the violation.


document.addEventListener("securitypolicyviolation", (e) => {


Specification Status Comment
Content Security Policy Level 3
The definition of 'originalPolicy' in that specification.
Working Draft Initial definition

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes591 No Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes591 Yes Yes ?

1. From version 59: this feature is behind the security.csp.enable_violation_events preference (needs to be set to true). To change preferences in Firefox, visit about:config.

See also

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills
 Last updated by: fscholz,