javascript - Watching for a message in an iframe -


i'm wondering if there's way in javascript/angularjs out message of sort when appears in iframe. example have form in iframe, , complete form , tells me i've completed it, there way detect via js?

any help/suggestions appreciated, thank you. :)

outside iframe listen event

      window.addeventlistener( "message",           function (e) {                  alert(e.data);               },false);

within iframe trigger event

      window.postmessage('form complete');

-

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