vue+elementui常用到的输入框验证

　　<el-input :disabled="mainId?true:false" @keyup.native="maxNumGetInput(index2)" v-model="item.maximumReceiveAllowed" style="width:10%"></el-input>

    maxNumGetInput(index) {
      this.formData[index].maximumReceiveAllowed = this.formData[index].maximumReceiveAllowed.replace(/[^\.\d]/g,‘‘);
      this.formData[index].maximumReceiveAllowed = this.formData[index].maximumReceiveAllowed.replace(‘.‘,‘‘); 
    },

　　<el-input v-model="item.money" @input="inputChange(index2)" @change="getPrice()"></el-input>

    //监听输入框变化
    inputChange(index) {
      let self = this;
      self.formData[index].money = self.inputnum(self.formData[index].money)
    },

    // 输入框最多两位小数
    inputnum(val) {
      let num = val.replace(/[^\d.]/g, ""); //清除"数字"和"."以外的字符
      num = num.replace(/^\./g, ""); //验证第一个字符是数字
      if (num.indexOf(‘.‘) == -1) { //小数点前留9位
        if (num.length > 9) {
          num = num.slice(0, 9);
        }
      } else {
        if (num.split(‘.‘)[0].length > 9) {
          num = num.split(‘.‘)[0].slice(0, 9) + ‘.‘ + num.split(‘.‘)[1];
        }
      }
      num = num.replace(/\.{2,}/g, ""); //只保留第一个, 清除多余的
      num = num.replace(".", "$#$").replace(/\./g, "").replace("$#$", ".");
      num = num.replace(/^(\-)*(\d+)\.(\d\d).*$/, ‘$1$2.$3‘); //只能输入两个小数
      return num
    },