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

The sourceFile read-only property of the DeprecationReportBody interface returns the path to the source file where the deprecated feature was used.

Note: This property can be used with DeprecationReportBody.lineNumber and DeprecationReportBody.columnNumber to locate the column and line in the file where the error occurred.


A string, or null if the path is not known.


In this example we create a new ReportingObserver to observe deprecation reports, then print the value of sourceFile to the console.

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

let observer = new ReportingObserver(function(reports, observer) {
  let firstReport = reports[0];
  console.log(firstReport.type); // deprecation
}, options);


Deprecation Reporting
# dom-deprecationreportbody-sourcefile

Browser compatibility

This feature is not yet available by default in any released browser. It can be activated in Firefox by setting dom_reporting_enabled to true and in Chrome if you enable this experimental feature.