This is an archived page. It's not actively maintained.

This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The getStructuredData() method of the HTMLIFrameElement interface retrieves any structured microdata (and hCard and hCalendar microformat data) contained in the HTML loaded in the browser <iframe> and returns it as JSON.


var instanceOfDOMRequest =


A DOMRequest to handle the getStructuredData() request's success and error cases. If the request is successful, the request.result is a JSON object representation of all microdata contained on the page loaded in the browser.




var browser = document.querySelector('iframe');
browser.addEventListener('mozbrowserloadend',function() {
  var request = browser.getStructuredData();
  request.onsuccess = function() {

Running this code in a Browser API app and then loading up a page that contains microdata (such as the website of British alt-country band Salter Cane) will result in a JSON object being returned, along the lines of:

        "properties":{"fn":["Chris Askew"],



Not part of any specification.

Browser compatibility

Supported since Firefox 47, in chrome code only.

Unlikely ever to be supported in other browsers.

See also