add_action( 'after_setup_theme', 'mythemename_setup' );
function mythemename_setup() {
add_theme_support( 'html5', array( 'search-form','comment-form', 'comment-list', 'gallery', 'caption', 'style', 'script' ) );
}
How to translate your theme into HTML5. WordPress function
Approved. Code works!
This is exactly the working code that is verified by the moderator or site administrators