Vietnamese number formatter

viFormatter.js

import dayjs from "dayjs";
import { round, isNil } from "lib/utils"; // from lodash
import numeral from "numeral";

numeral.register("locale", "vi", {
  delimiters: {
    thousands: ".",
    decimal: ",",
  },
  abbreviations: {
    thousand: "k",
    million: "tr",
    billion: "tỷ",
    trillion: "nghìn tỷ",
  },
  ordinal(number) {
    return number;
  },
  currency: {
    symbol: "đ",
  },
});

numeral.locale("vi");

const formatter = {
  toCurrency(value, digits = 2) {
    return !isNil(value)
      ? numeral(value).format(`0,.[${"0".repeat(digits)}] $`)
      : null;
  },
  toRoundingNumber(value, step = 500) {
    if (isNil(value)) {
      return null;
    }

    if (step > 1 && value > 0) {
      const precision =
        value % step ? -step.toString().length : -(step.toString().length - 1);
      return round(value, precision);
    } else return 0;
  },
  toDate(value) {
    return !isNil(value) ? dayjs(value).format("L") : null;
  },
  toDateWithoutYear(value) {
    return !isNil(value) ? dayjs(value).format("DD/MM") : null;
  },
  toTime(value) {
    return !isNil(value) ? dayjs(value).format("LT") : null;
  },
  toDateTime(value) {
    return !isNil(value) ? dayjs(value).format("LLL") : null;
  },
  toShortDateTime(value) {
    return !isNil(value) ? dayjs(value).format("L LT") : null;
  },
  toNumeric(value) {
    return !isNil(value) ? numeral(value).format("0,0[.]00") : null;
  },
  toAcronymCurrency(value) {
    return !isNil(value) ? numeral(value).format("0.0a") : null;
  },
  toPercentage(value) {
    return !isNil(value) ? numeral(value).format("0,.[00]%") : null;
  },
};

export default formatter;