Frustrated by Magento? Then you’ll love
Magento 2: Adding Arbitrary HTML to the of Every Page?
This developer tried to embrace the new
<head/> and <body/> standards in Magento 2’s layout, and you won’t belive what happens next.
Spoilers – what happens next is he learns the <head/> directive has no way to add arbitary HTML, but that adding content to specially named <body/> tag does.