vue input 金额

<input v-model="price" type="digit" @input="handleInput2" :maxlength="moneyMaxLeng" class="item-asw" placeholder="请输入金额"/>
            
handleInput2(e) {
      this.$nextTick(() => {
        let val = e.target.value.toString();
        val = val.replace(/[^\d.]/g, ""); //清除"数字"和"."以外的字符
        val = val.replace(/\.{2,}/g, "."); //只保留第一个. 清除多余的

        var len1 = val.substr(0, 1);
        var len2 = val.substr(1, 1);
        //如果第一位是0，第二位不是点，就用数字把点替换掉
        if (val.length > 1 && len1 == 0 && len2 != ".") {
          val = val.substr(1, 1);
        }
        //第一位不能是.
        if (len1 == ".") {
          val = "";
        }

        val = val.replace(/^0+\./g, '0.');
        val = val.match(/^0+[1-9]+/) ? val = val.replace(/^0+/g, '') : val
        val = (val.match(/^\d*(\.?\d{0,2})/g)[0]) || ''

        if (val.includes(".")) {
          let numDian = val.toString().split(".")[1].length;
          if (numDian === 2) {
            this.moneyMaxLeng = val.length;
          }
        } else {
          this.moneyMaxLeng = 8;
        }
        this.price = val;
      });
    }