Sales Order - Close Sales Order

CloseSalesOrder.js

function closeSalesOrder(salesOrderInternalId) {

    try {
        var order = record.load({
            id: salesOrderInternalId,
            type: record.Type.SALES_ORDER,
            isDynamic: true
        });

        var itemIndex = 0;
        var itemCount = order.getLineCount({
            "sublistId": "item"
        });

        log.debug('item count', itemCount);

        while (itemIndex < itemCount) {
            order.selectLine({
                "sublistId": "item",
                "line": itemIndex
            });
            order.setCurrentSublistValue({
                "sublistId": "item",
                "fieldId": "isclosed",
                "value": true
            });

            order.commitLine({
                "sublistId": "item"
            });

            itemIndex++;
        }
        var recordId = order.save({
            enableSourcing: false,
            ignoreMandatoryFields: false
        });

        return true;
    }
    catch (error) {
        return false;
    }
}