InterventionReportBody: columnNumber property

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The columnNumber read-only property of the InterventionReportBody interface returns the line in the source file in which the intervention occurred.

Note: This property is most useful alongside InterventionReportBody.sourceFile and 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 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);


Intervention Reporting
# dom-interventionreportbody-columnnumber

Browser compatibility

BCD tables only load in the browser