twentyseventeen_content_image_sizes_attr( string $sizes, array $size ): string

562function twentyseventeen_content_image_sizes_attr( $sizes, $size ) {563	$width = $size[0];564 565	if ( 740 <= $width ) {566		$sizes = '(max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px';567	}568 569	if ( is_active_sidebar( 'sidebar-1' ) || is_archive() || is_search() || is_home() || is_page() ) {570		if ( ! ( is_page() && 'one-column' === get_theme_mod( 'page_options' ) ) && 767 <= $width ) {571			$sizes = '(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px';572		}573	}574 575	return $sizes;576}