How can I parse a string with a comma thousand separator to a number?

Question

I have 2,299.00 as a string and I am trying to parse it to a number. I tried using parseFloat, which results in 2. I guess the comma is the problem

Answer 1

If you have a small set of locales to support you'd probably be better off by just hardcoding a couple of simple rules:

function parseNumber(str, locale) {
  let radix = ',';
  if (locale.match(/(en|th)([-_].+)?/)) {
    radix = '.';
  }
  return Number(str
    .replace(new RegExp('[^\\d\\' + radix + ']', 'g'), '')
    .replace(radix, '.'));
}