This prevents showing a blank iframe by first checking if a message was successfully received from it. Fixes #35894. Built from https://develop.svn.wordpress.org/trunk@36648 git-svn-id: http://core.svn.wordpress.org/trunk@36615 1a063a9b-81f0-0310-95a4-ce76da25c4cd
42 KiB
42 KiB