files/en-us/web/api/interventionreportbody/columnnumber/index.md
{{APIRef("Reporting API")}}{{AvailableInWorkers}}{{SeeCompatTable}}
The columnNumber read-only property of the {{domxref("InterventionReportBody")}} interface returns the line in the source file in which the intervention occurred.
[!NOTE] This property is most useful alongside {{domxref("InterventionReportBody.sourceFile")}} and {{domxref("InterventionReportBody.lineNumber")}} as it enables the location of the column in that file and line where the feature is used.
An integer, or null if the column is not known.
In this example we create a new {{domxref("ReportingObserver")}} to observe intervention reports, then print the value of columnNumber to the console.
const options = {
types: ["intervention"],
buffered: true,
};
const observer = new ReportingObserver((reports, observer) => {
const firstReport = reports[0];
console.log(firstReport.type); // intervention
console.log(firstReport.body.sourceFile); // the source file
console.log(firstReport.body.lineNumber); // the line in that file
console.log(firstReport.body.columnNumber); // the column in that file.
}, options);
{{Specifications}}
{{Compat}}