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SecurityPolicyViolationEvent.sample

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

The sample read-only property of the SecurityPolicyViolationEvent interface is a DOMString representing a sample of the resource that caused the violation.

Syntax

let sample = violationEventInstance.sample;

Value

A DOMString containing a sample of the resource that caused the violation, usually the first 40 characters. This will only be populated if the resource is an inline script, event handler, or style — external resources causing a violation will not generate a sample.

Example

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

Specifications

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

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	59	Yes	63 63 59 Disabled Disabled 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.	No	46	Yes