CSP violation reportsCSP violation reporting sends a report to a URL nominated by the Reporting-Endpoints header or the ReportingObserver API when a page violates its content security policy.reportingReportingnewly2026-03-24https://w3c.github.io/webappsec-csp/#reportinghttps://developer.mozilla.org/docs/Web/HTTP/Reference/Headers/Content-Security-Policy/report-toapi.ReportingObserver.ReportingObserver.options_parameter.types_property.csp-violationhttp.headers.Content-Security-Policy.report-tohttps://nowyoucanuse.com/features--reporting-csp-violations.html