Aaron T. Grogg

When in Admin mode, this plug-in adds classes to the <code><body></code> tag to let 
your CSS know where you are.
For example, if you are viewing the list of all your Posts, you would get this additional class: 
 edit-list-post 
And, when you are editing a Post, something like this: 
 edit-page-post
Alternatively, for custom posts, for example “movie”, you would see either: 
 edit-list-movie 
or: 
 edit-page-movie
This allows you to write custom CSS and JS to interact with these varying edit pages within WP.
Please let me know if you have any questions/suggestions/thoughts, 
Atg

Add Custom Post Type Slugs to Admin Body Class

Add Custom Post Type Slugs to Admin &lt;body&gt; Class

Sparanoid

Add you current theme slug to your HTML <code>body</code> class via <code>body_class</code> for easy customization
<ul>
<li>No database writes, no configurations, install, activate and go.</li>
<li>Easy styles customization via Jetpack Custom CSS or built-in Custom CSS (WordPress version 4.7 or higher required).</li>
</ul>

Current Theme Body Class

Add you current theme slug to your HTML body class for easy customization

Add Custom Post Type Slugs to Admin Body Class vs Current Theme Body Class