This WordPress snippet will add a class to the first post in the WordPress loop.
This snippet is very handy if you wish to add category ID to WordPress body and post class for ex. targeting CSS styles and such.
This snippet will change the default style of WordPress admin area by overriding the old stylesheet.
This snippet will let you create a white-list of terms to include in body_class. This is a great way to filter out many of the unwanted css classes added.