金额格式化

// 金额格式化，20000->20.000
moneyFormat(num) {
    const RegExp = /B(?=(?:d{3})+(?!d))/g
    if (num === undefined || num === null) return
    num = num.toString()
    if (num.indexOf('.') >= 0) {
      var lastIndex = num.lastIndexOf('.')
      var betweenDot = num.substring(lastIndex + 1, num.length)
      if (betweenDot && parseInt(betweenDot)) {
        const beforeDot = num.substring(0, lastIndex)
        const bereeDotFormat = beforeDot && beforeDot.toString().replace(RegExp, '.')
        num =
        bereeDotFormat +
        ',' +
        num.substring(lastIndex + 1, num.length)
        return num
      } else {
        const tempNum = num.substring(0, lastIndex)
        num = tempNum && tempNum.toString().replace(RegExp, '.')
        return num
      }
    }
    let numformat = num && num.toString().replace(RegExp, '.')
    return numformat
  },

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