Format currency "abc12000.33.33" => "12,000,33"

currency-formatter.js

/*
  Convert a string to formatted currency.
  Example: "abc12000.33.33" => "12,000.33"
 */
export function currencyFormatter(value) {
  value = value.toString();
  // Clear left side zeros
  while (value.charAt(0) === "0") {
    value = value.substr(1);
  }
  // Remove any character that is not a digit or decimal
  value = value.replace(/[^\d.]/g, "");
  // Remove everything after 2 decimal places
  const point = value.indexOf(".");
  if (point >= 0) {
    value = value.slice(0, point + 3);
  }
  const decimalSplit = value.split(".");
  let intPart = decimalSplit[0];
  let decPart = decimalSplit[1];
  // Add thousands separator (commas)
  if (intPart.length > 3) {
    let intDiv = Math.floor(intPart.length / 3);
    while (intDiv > 0) {
      let lastComma = intPart.indexOf(",");
      if (lastComma < 0) {
        lastComma = intPart.length;
      }
      if (lastComma - 3 > 0) {
        intPart = `${intPart.slice(0, lastComma - 3)},${intPart.slice(lastComma - 3)}`;
      }
      intDiv--;
    }
  }
  if (decPart === undefined) {
    decPart = "";
  } else {
    // Add a zero if there's only one decimal digit
    if (decPart.toString().length === 1) {
      decPart += "0";
    }

    decPart = `.${decPart}`;
  }

  if (intPart === "") {
    // Add a zero if there's only a decimal
    intPart = "0";
  }
  return intPart + decPart;
}