antdUI a-input-number 价钱格式保留2位小数

<template>
  <div id="app">

     <a-input-number
      v-model="newMoney"
      :formatter="inputNumberF"
      :parser="inputNumberP"
      :precision="decimalPlaces"
      @change="onChange"
    />
  </div>
</template>

<script>

export default {
  name: 'App',
  data() {
    return {
      // 旧值
      oldMoney: null,
      // 新的值
      newMoney: null,
      // 整数位
      integralDigits: 6,
      // 小数位
      decimalPlaces: 2,
      // 符号 ￥
      symbol: '￥'
      
    }
  },
  methods: {
    inputNumberF(value){
      let res = this.regHandel(value)
      let val = value.replace(res.reg, res.gs)
      if(this.symbol != ''){
        return `${this.symbol} ${val}`.replace(/\B(?=(\d{3})+(?!\d))/g, ',')
      }else{
        return val.replace(/\B(?=(\d{3})+(?!\d))/g, ',')
      }
    },
    inputNumberP(value){
      let res = this.regHandel(value)
      let reg2 = null
      if(this.symbol != ''){
        reg2 = new RegExp(`${this.symbol}\\s?|(,*)`,'g')
      }else{
        reg2 = new RegExp('(,*)','g')  
      }
      let val = value.replace(reg2, '')
      
      return val.replace(res.reg, res.gs)
    },
    regHandel(value) {
      let reg = null
      let gs = null
      let dIndex = value.toString().indexOf('.')
      // 点开头处理为 0.
      if(dIndex === 0) {
        value = '0.'
      }else{
        // 连续点转为一个点
        let dIndex2 = value.toString().indexOf('..')
        if(dIndex2 !== -1) {
          value = value.replace(/\.\./, '.')
        }
      }
      value = value.replace(/[^0-9.]/g, '')
      var arr = value.split(".")
      if(arr.length == 2 && arr[1] != ''){
        reg = new RegExp(`^(-)*(\\d{0,${this.integralDigits}})\\d*\\.(\\d{0,${this.decimalPlaces}}).*$`);
        gs = '$1$2.$3'
      }else{
        reg = new RegExp(`^(-)*(\\d{0,${this.integralDigits}}).*$`);
        if(dIndex != -1){
          gs = '$1$2.'
        }else{
          gs = '$1$2'
        }
      }
      return {reg: reg, gs:gs}
    },
    onChange(value) {
      value = parseFloat(value)
      if(this.oldMoney == value){
        // 旧值等于新值则返回，不执行下面操作
        return;
      }
      // 更新旧值
      this.oldMoney = value
      console.log('changed', value);
    },
    
  }
}
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
#app .ant-input-number{
  width: 200px;
}
</style>