sample.sh

▶ c2fo WM-292 ✗ node test-csv.js test.csv
test.csv
[ { header1: '1-1', header2: '1-2', header3: '1-3' },
  { header1: '2-1', header2: '2-2', header3: '2-3' },
  { header1: '3-1', header2: '3-2', header3: '3-3' } ]
▶ c2fo WM-292 ✗ node
> let val1 = false;
undefined
> t = require('./test-csv')
{ newTable: [Function: newTable] }
> h = t.newTable('test.csv', function(data) {console.log("D", data[0]);  val1 = data[0].header1; })
test.csv
undefined
> D { header1: '1-1', header2: '1-2', header3: '1-3' }

> val1
'1-1'
>

test-csv.js

const fastCsv = require('fast-csv');
const fs = require('fs');
const csv = require('fast-csv');

/**
 * Call this like so: `node test-csv.js test.csv`
 * `test-csv.js` is the path to your CSV file.
 *
 * @param {String} fileName
 * @param {Function} callback
 */
function newTable(fileName, callback) {
    console.log(fileName)
    const stream = fs.createReadStream(fileName);
    const table =[];

    csv
     .fromStream(stream, {headers : true}, {objectMode : true})
     .on("data", function(row){
         table.push(row);
     })
     .on("end", function() {
         callback(table);
     });
}

if (process.argv[2]) {
    newTable(process.argv[2], function(data) {
        console.log(data);
    });
}

module.exports = {
    newTable,
};

test.csv