When the featured image takes longer to load, the browser might not know its exact dimensions yet and therefore sends an incorrect document height to the embedding site.
By sending the document's height again after the featured image has been loaded, we ensure that the iframe doesn't get cut off.
Fixes#35657.
git-svn-id: https://develop.svn.wordpress.org/trunk@37745 602fd350-edb4-49c9-b593-d223f7449a82
This moves the last of the iframe message code from PHP to JavaScript, so it can be included in any site, without needing to rely on any of WordPress' internal behaviour.
Props swissspidy.
Fixes#34451.
git-svn-id: https://develop.svn.wordpress.org/trunk@35577 602fd350-edb4-49c9-b593-d223f7449a82
Older IE versions need just that little bit of extra tender care to keep them going.
Props peterwilsoncc, swissspidy, pento.
Fixes#34204.
git-svn-id: https://develop.svn.wordpress.org/trunk@35466 602fd350-edb4-49c9-b593-d223f7449a82