Report.type

The type read-only property of the Report interface returns the type of report generated, e.g. deprecation or intervention.

let reportType = reportInstance.type

A string representing the type of the report. Currently the available types are deprecation, intervention, and crash.

let options = {
  types: ['deprecation'],
  buffered: true
}

let observer = new ReportingObserver(function(reports, observer) {
  let firstReport = reports[0];
  // Log the first report's report type, i.e. "deprecation"
  console.log(firstReport.type);
}, options);

• Reporting API