Iphone safari not resizing viewport on keyboard open
Safari and WKWebView on iOS 10 do not update the window.innerHeight property when the keyboard is shown. On previous versions of iOS WKWebView would update the window.innerHeight property when the keyboard is shown.
Seems docs now state the opposite behavior of that noted by OP
As of March 2021, window.innerHeight DOES reflect the presence of a soft keyboard on iPad running IOS 14.4.1