/**
* @NApiVersion 2.x
* @NScriptType UserEventScript
*/
define([
  'N/log'
  ], function(
    log
  ) {
    const exports = {};
      function afterSubmit(context) {
      var newRecord = context.newRecord
      switch (context.type) {
        case context.UserEventType.CREATE:
          return ;
        case context.UserEventType.EDIT:
          var payload = getSalesOrderItems(newRecord);
          log.debug(payload);
          break;
        default:
          throw 'Invalid event type';
      }
  }

  exports.afterSubmit = afterSubmit;
  return exports;
});

function getSalesOrderItems(salesRecord)
      {
        var items = [];
        var itemLength = salesRecord.getLineCount({
            sublistId : 'item'
        });

        if (itemLength === 0) throw 'Order does not have any valid item';

        for (var index = 0; index < itemLength; index++) {
          var item = {};

          var itemId = salesRecord.getSublistValue({
            sublistId: 'item',
            fieldId: 'item',
            line: index
          });

          try {
            var itemRecord = record.load({
              type: record.Type.SERIALIZED_INVENTORY_ITEM,
              id: itemId,
            });
          } catch (ex) {
            if (JSON.parse(ex).name == "SSS_RECORD_TYPE_MISMATCH") {
              itemRecord = record.load({
                type: record.Type.KIT_ITEM,
                id: itemId,
              });
            }
          }

          if (!itemRecord) throw ('Item with id ' + itemId + ' does not exist');

          item.sku = itemRecord.getValue('itemidorig');
          item.quantity_committed = salesRecord.getSublistValue({
            sublistId: 'item', fieldId: 'quantitycommitted', line: index
          });
          item.quantity = salesRecord.getSublistValue({
            sublistId: 'item', fieldId: 'quantity', line: index
          });

          items.push(item)

          return items;
        }
      }

{
    [{
        "sku":"EMOST00405",
        "quantity":2
    }]
}

{
    [{
         "sku":"EMOST00405",
         "quantity_committed": 1,
         "quantity":2
    }]
}