javascript - Ad Viewability Inside Third-Party iFrames -

so google recent acquisition of spider.io, talking ad viewability.

aside spider.io's patented technique , comscore's patented geometric technique... there other way of detecting ad viewability using javascript inside 3rd-party iframe?

thanks!

there way detect cross domain view-ability

1) request animation frame (ios). 2) intersectionobserver (api chrome, firefox etc).

both example here.

var options = { threshold: [0.0, 0.3, 0.7, 1.0] 

};

var element = document.getelementbyid("element");  function intersectionobserver(callback) {      function callbackobserver(entries, observer)     {         entries.foreach(function(entry)         {             callback.call(this, entry.intersectionratio == 0)         });     }     var observer = new intersectionobserver(callbackobserver, options);     observer.observe(element); }   function reqanimframe(callback) {     var lastcalled;     var fps;     var timediff;      function requestanimframe()     {         if (!lastcalled)         {             lastcalled = date.now();             fps = 0;         }         timediff = (date.now() - lastcalled);          if (timediff <= 1000)         {             fps++;         }         else         {             lastcalled = date.now();             fps = 0;         }         callback.call(this, fps <= 10);         window.requestanimationframe(requestanimframe);     }     window.requestanimationframe(requestanimframe); } var callback = function(isnotview) {     console.log(isnotview); }  //ios reqanimframe(callback);  //other ios intersectionobserver(callback);