hook (filter): Filter the Custom CSS preview message JS styling.
hook (filter): Filter the Custom CSS preview message JS styling.
hook (action): Fires right before the custom css page begins.
hook (filter): Filter the intro text appearing above the Custom CSS Editor.
hook (filter): Filter the Custom CSS limited width's support doc URL.
hook (filter): Filter the Custom CSS returned from the editor.
hook (action): Fires right before printing the custom CSS inside the element.
hook (filter): Filter the Custom CSS link enqueued in the head.
hook (filter): Do not include any CSS on the page if the CSS includes an error.<p>Setting this filter to true stops any Custom CSS from being enqueued.</p>
hook (filter): Determine if a WordPress.com site uses a Free trial of the Custom Design Upgrade.<p>Used only on WordPress.com.</p>
hook (filter): Filter the Custom CSS returned.<p>Can be used to return an error, or no CSS at all.</p>
