https://gist.github.com/Jezternz/c8e9fafc2c114e079829974e3764db75

const csvStringToArray = (data) => {
  const re = /(,|\r?\n|\r|^)(?:"([^"]*(?:""[^"]*)*)"|([^,\r\n]*))/gi
  const result = [[]]
  let matches
  while ((matches = re.exec(data))) {
    if (matches[1].length && matches[1] !== ',') result.push([])
    result[result.length - 1].push(
      matches[2] !== undefined ? matches[2].replace(/""/g, '"') : matches[3]
    )
  }
  return result
}

other versions

https://gist.github.com/plbowers/7560ae793613ee839151624182133159

https://github.com/evanplaice/jquery-csv

https://github.com/vanillaes/csv