javascript - Check if cross-origin iframe is loaded with correct status code -


i'm trying embed google calendar iframe using shared link works google account in our domain. 

 <div class="embed-responsive embed-responsive-16by9">      <iframe class="embed-responsive-item" src="https://calendar.google.com/calendar/b/1/embed?src=..."></iframe>  </div>

if user logged in 1 of google accounts in domain calendar displays properly. otherwise, iframe empty (status code 302). in such case, need display placeholder , message notify user.

javascript access loaded content blocked same-origin policy.

how can check if iframe content loaded? thank in advance.


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