Convert amount figures to uppercase

One 、 design sketch ：

Two 、 Code block

      computeLen(number){
    
        let ret = ''
        if (number !== '' && number != null && number !== '0') {
    
          let unit = ' Ten billion yuan and ten thousand yuan and ten cents '
          let str = ''
          number += '00'
          const point = number.indexOf('.')
          if (point >= 0) {
    
            number = number.substring(0, point) + number.substr(point + 1, 2)
          }
          unit = unit.substr(unit.length - number.length)
          for (let i = 0; i < number.length; i++) {
    
            str +=
              ' One two three four five six seven eight nine '.charAt(number.charAt(i)) + unit.charAt(i)
          }
          ret =
            str
              .replace(/ zero ( Thousand | Bai | Ten | horn )/g, ' zero ')
              .replace(/( zero )+/g, ' zero ')
              .replace(/ zero ( ten thousand | Billion | element )/g, '$1')
              .replace(/( Billion ) ten thousand |( Ten )/g, '$1$2')
              .replace(/^ Yuan zero ?| Zero point /g, '')
              .replace(/ element $/g, ' element ') + ' whole '
        }
        this.model.taxNotIncludedCapital = ret
      },