Fetch values in an iframe ArcGIS Online

[VallottonNicolas]

Hi, 

I'm pretty new with ArcGIS Javascript and i'd like to get the value of an ArcGIS Online map in an iframe.

When i click on the map, i saw that the request fetch is sent (on my own ArcGIS server) to get the values in a popup-container in the App : https://hepiageo2.hesge.ch/server/rest/services/p_anasol/ge_unite_exploitation/FeatureServer/0/query...

I'd like to put the data in an Array or create variable with the values. How can i get the fetch the request ?

Here is the map : https://arcg.is/10iKCv

Thanks!