Converts a CSV string to JSON. Assumes valid and well-formed CSV with a header. Only works for the most simple use cases.

parse-csv.js

// Convert CSV string to JavaScript object array
const parseCSV = (string) => {
  const removeEmpty = (string) => string.length > 0;
  const removeQuotes = (string) => string.length > 0 ? string.replace(/^["'](.*)["']$/, '$1') : undefined;

  const lines = string.split(/\r?\n/).filter(removeEmpty);
  const rows = lines.map(line => line.split(/,|;/).map(removeQuotes));
  
  return rows.reduce((accArr, currRow, rowIndex) => {
    if (rowIndex != 0) {
      const obj = Object.assign({}, ...rows[0].map(
        (key, columnIndex) => ({[key]: currRow[columnIndex]})
      ))
      accArr.push(obj);
    }

    return accArr;
  }, []);
};

// Usage example for Node.js
// const fs = require('fs');
// fs.readFile('data.csv',  'utf8', (error, string) => {
//   const objArr = parseCSV(string);
//   const jsonStr = JSON.stringify(objArr, null, 2);
//   console.log(jsonStr);
// });