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

565function twentysixteen_content_image_sizes_attr( $sizes, $size ) {566	$width = $size[0];567 568	if ( 840 <= $width ) {569		$sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px';570	}571 572	if ( 'page' === get_post_type() ) {573		if ( 840 > $width ) {574			$sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px';575		}576	} else {577		if ( 840 > $width && 600 <= $width ) {578			$sizes = '(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px';579		} elseif ( 600 > $width ) {580			$sizes = '(max-width: ' . $width . 'px) 85vw, ' . $width . 'px';581		}582	}583 584	return $sizes;585}