'; if ( static::is_loading_fonts_async() ) { /* if we want to preload fonts async */ $attr = 'rel="preload" as="style" onload="this.rel=\'stylesheet\'"'; } else { /* load fonts normally */ $attr = 'rel="stylesheet"'; } echo sprintf( '', $attr, implode( '|', static::$font_families ), implode( '&', static::$font_subsets ) ); static::$fonts_rendered = true; } } }