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twentytwentyone_the_html_classes example

?> <!doctype html> <html <?php language_attributes(); ?> <?php twentytwentyone_the_html_classes(); ?>> <head> <meta charset="<?php bloginfo( 'charset' ); ?>" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <?php wp_head(); ?> </head> <body <?php body_class(); ?>> <?php wp_body_open(); ?> <div id="page" class="site"> <a class="skip-link screen-reader-text" href="#content"> <?php