WooCommerce - Default shipping SUB-method 1.5.7/1.6+

gistfile1.aw

add_filter( 'woocommerce_shipping_chosen_method', 'custom_shipping_chosen_method', 10, 2 );

function custom_shipping_chosen_method( $chosen_method, $_available_methods ) {
    switch ( $_available_methods[0] ) {
    	case 'table_rate:0-USPS':
    		$chosen_method = 'table_rate:0-USPS';
    		break;
    	case 'table_rate:1-USPS':
    		$chosen_method = 'table_rate:1-USPS';
    		break;
    	case 'table_rate:2-USPS':
    		$chosen_method = 'table_rate:2-USPS';
    		break;
    	case 'table_rate:3-USPS':
    		$chosen_method = 'table_rate:3-USPS';
    		break;
    	case 'table_rate:4-USPS':
    		$chosen_method = 'table_rate:4-USPS';
    		break;
    };
    return $chosen_method;
}

woocommerce/woocommerce@5c4799e