Hook name: twentytwentyone_html_classes Hook type: filter Plugin ref: Twenty Twenty-One Sourcefile: File ref: twentytwentyone_the_html_classes() – Calculate classes for the main <html> element. Description: Parameters: Deprecated?: No API Letters: C,H,T Invokers 1 to 1 of 1 twentytwentyone_the_html_classes() – Calculate classes for the main <html> element. Implementers