An action to grab on to if another Jetpack Module would like to add its own controls.

Filter the ID of the post where Custom CSS is stored, before the ID is retrieved.If the callback function returns a non-null value, then post_id() will immediately return that value, instead of retrieving the normal post ID.

Fires before optimizing the Custom CSS subvalue.

Filter the theme’s stylesheet URL.

Allows addition of elements to the submit box for custom css on the wp-admin side.

Fires after parsing the css.

Filter the Custom CSS preview message JS styling.

Fires right before the custom css page begins.

Filter the intro text appearing above the Custom CSS Editor.

Filter the Custom CSS limited width’s support doc URL.