Typescript(Javascript) conversion of amount into Korean Function (타입스크립트(자바스크립트) 금액 한글로 변환 함수)

viewKorean.ts

export const viewKorean = (num: any): string => {
  num = parseInt((num + '').replace(/[^0-9]/g, ''), 10) + '';
  if (num == '0') return '영';
  let number = ['영', '일', '이', '삼', '사', '오', '육', '칠', '팔', '구'];
  let unit = ['', '만', '억', '조'];
  let smallUnit = ['천', '백', '십', ''];
  let result = [];
  let unitCnt = Math.ceil(num.length / 4);
  num = num.padStart(unitCnt * 4, '0');
  let regexp = /[\w\W]{4}/g;
  let array = num.match(regexp);
  for (let i = array.length - 1, unitCnt = 0; i >= 0; i--, unitCnt++) {
    let hanValue = _makeHan(array[i]);
    if (hanValue == '') continue;
    result.unshift(hanValue + unit[unitCnt]);
  }
  function _makeHan(text: any) {
    let str = '';
    for (let i = 0; i < text.length; i++) {
      let num = text[i];
      if (num == '0')
        //0은 읽지 않는다
        continue;
      str += number[num] + smallUnit[i];
    }
    return str;
  }
  return result.join('');
};