🏠 New in Low Baseline Support: Reporting API

March 24, 2026

caniuse · mdn · [spec]([‘https://w3c.github.io/reporting/’, ‘https://wicg.github.io/intervention-reporting/’, ‘https://wicg.github.io/deprecation-reporting/’, ‘https://w3c.github.io/webappsec-csp/#reporting’])

The Reporting-Endpoints HTTP header and ReportingObserver() API send reports of Content Security Policy (CSP) violations, Permissions-Policy violations, deprecated feature usage, browser interventions, and crashes to a nominated URL or callback function.

Source features

• api.ReportingObserver [mdn]
• api.ReportingObserver.ReportingObserver [mdn]
• api.ReportingObserver.ReportingObserver.options_parameter [mdn]
• api.ReportingObserver.ReportingObserver.options_parameter.types_property [mdn]
• api.ReportingObserver.disconnect [mdn]
• api.ReportingObserver.observe [mdn]
• api.ReportingObserver.takeRecords [mdn]
• api.ReportingObserver.ReportingObserver.options_parameter.types_property.csp-violation [mdn]
• http.headers.Reporting-Endpoints [mdn]
• api.ReportingObserver.worker_support [mdn]
• api.ReportingObserver.ReportingObserver.options_parameter.types_property.integrity-violation [mdn]
• api.ReportingObserver.ReportingObserver.options_parameter.types_property.coep [mdn]
• api.ReportingObserver.ReportingObserver.options_parameter.types_property.deprecation [mdn]
• api.ReportingObserver.ReportingObserver.options_parameter.types_property.intervention [mdn]