HTMLIFrameElement: browsingTopics property

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

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

Warning: This feature is currently opposed by two browser vendors. See the Standards positions section for details of opposition.

The browsingTopics property of the HTMLIFrameElement interface is a boolean specifying that the selected topics for the current user should be sent with the request for the associated

Log the browsingTopics value via script:

js
const iframeElem = document.querySelector("iframe");
console.log(iframeElem.browsingTopics); // will return true in supporting browsers