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

The anticipatedRemoval read-only property of the DeprecationReportBody interface returns the date that the browser version which removes the feature will ship. This value can be used to prioritize warnings. If this property returns null because the date is unknown, then the deprecation should be considered low priority.


A date object, or null if the date is not known.


In this example we create a new ReportingObserver to observe deprecation reports, then print the value of anticipatedRemoval 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-anticipatedremoval

Browser compatibility

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