Node CSV to JSON

csv-to-json.js

// dependencies
// > yarn add csvtojson

// Usage:
// > node csv-to-json.js input.csv output.json

const fs = require('fs')
const path = require('path')
const csv = require('csvtojson')

const csvFile = path.resolve(process.argv[2])
const jsonFile = path.resolve(process.argv[3])

const output = []


// do transformations and add to output array
function loadRow(row) {
  output.push(row)
}

// write to file
function writeJson(err) {
  if (err) { throw err }

  const content = JSON.stringify(output, null, 2)

  fs.writeFile(jsonFile, content, 'utf8', function (err) {
    if (err) { throw err }
    console.log(`Json file saved to ${jsonFile}`)
  })
}

// execute
csv()
  .fromFile(csvFile)
  .on('json', loadRow)
  .on('done', writeJson)