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SecurityPolicyViolationEvent.lineNumber

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

The lineNumber read-only property of the SecurityPolicyViolationEvent interface is the line number in the document or worker at which the violation occurred.

Syntax

let lineNumber = violationEventInstance.lineNumber;

Value

A number representing the line number at which the violation occurred.

Example

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

Specifications

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

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	Yes	15	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	Yes	Yes