files/en-us/web/api/cspviolationreportbody/tojson/index.md
{{APIRef("Reporting API")}}{{deprecated_header}}
The toJSON() method of the {{domxref("CSPViolationReportBody")}} interface is a serializer, which returns a JSON representation of the CSPViolationReportBody object.
The existence of a toJSON() method allows CSPViolationReportBody objects to be converted to a string using the {{jsxref("JSON.stringify()")}} method.
This is used by the reporting API when creating a serialized version of a violation report to send to a reporting endpoint.
toJSON()
None.
A JSON object that is the serialization of the {{domxref("CSPViolationReportBody")}} object.
In this example we create a new {{domxref("ReportingObserver")}} to observe CSP violation reports, then return a JSON representation of the first entry.
const observer = new ReportingObserver(
(reports, observer) => {
const firstReport = reports[0];
// Log JSON object
console.log(firstReport.toJSON());
// Log JSON object as a string
console.log(JSON.stringify(firstReport));
},
{
types: ["csp-violation"],
buffered: true,
},
);
observer.observe();
We call toJSON() on the firstReport, which is a {{domxref("Report")}} instance, which in turn results in the toJSON() defined in this interface being called to serialize the body of the report.
For the purpose of demonstration we also call JSON.stringify() on firstReport to create a string containing the JSON data.
When sending or storing report information it is more common to do this than use toJSON() directly.
{{Specifications}}
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