height is sometimes wrong when browser height shrinks #51
Description
When I shrink the website height by resizing my browser (Chrome Desktop Version 87.0.4280.88) the height (output of the measureHeight function) is sometimes too small by 15px.
This means a 15px tall white bar along the bottom of my site flicks into and out of existence as I shrink the browser.
As I drag the bottom of the window up, every 2nd call to measureHeight returns the incorrect value.
There is no issue when increasing the window height.
The odd thing is if I stop resizing the window once I get a bad value, and then use the console to get the documentElement.clientHeight, I get the correct value. It's almost like the browser hasn't updated the documentElement.clientHeight when measureHeight runs, but then it does so right after.
This does not happen when I activate the device toolbar, switch it to responsive and shrink the height there.
Does anyone else have this issue? I'm not sure if it is a browser bug, something in this library or most likely just something odd with my site.