Change record status: 
Project: 
Introduced in branch: 
8.6.x
Description: 

Previously the node preview page doesn't have the "page-node-type-[node-type]" class in the HTML body class attribute that leads to missing styles that can be found in the normal node view page.

Now the node type class is added to the node preview page's HTML body class attribute in order to have the normal node view page styles applied as well.

Impacts: 
Module developers
Themers