Team,
I need a javascript function to validate csv file is conform to a schema definition.

BU_NAME,BU_CONTACT,CONTEXT
US_BU,John,FIN
US_BU,Emily,SCM
,Eric,SCM
UK_BU,Joe,SCM

The above input file should throw error in line 3 as the mandatory BU_NAME is blank. But the below JS code didn’t fall in catch block. It always returns 200 but I need 500 when there is csv format issue encountered.

resolve(fileSet) {
        const validator = require('xsd-schema-validator');
        let status = '';
        if (fileSet.length > 0) {
          //Grab the first (and only) file
          let csvFile = fileSet[0];
          //Check it's the correct type
          try {
            if (csvFile.type === 'text/csv') {
              alert('CSV FILE');
              //Create a File reader and its onload callback
              let fileReader = new FileReader();
              fileReader.onload = function (fileReadEvent) {
                let readCSVData = fileReadEvent.target.result;
                alert('result 11===>  ' + readCSVData);
                // resolve(readCSVData);
              };
              fileReader.readAsText(csvFile);
status = 200;
            }
            
          } catch (error) {
alert('status ===>  ' + status+ '  error ==> '+ error);
            return status = 500;
          }
        }
        
        return status;
      }