https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array, https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String

read-things.js

var fs = require('fs');

var whateverCsv = fs.readFileSync('whatever.csv');
var otherCsv = fs.readFileSync('other.csv');

var lines = content.split('\n');
var columnNamesArray = lines[0].split(',');

var firstColumnName = columnNamesArray[0];