elementUI的限制每行的某列只能输入正数，满足则置空

表格：

<template>
  <div class="app-container">
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          >增加行</el-button
        >
      </el-col>
    </el-row>
    <el-table v-loading="loading" :data="gckj_standardList" id="standard_table">
      <el-table-column label="满分值" align="center" prop="score" width="120" >
         <template slot-scope="scope">
           <el-input v-model="scope.row.score" @change="checkScore(scope)"></el-input> 
          </template>
         </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width" width="180"  >
        <template slot-scope="scope">
          <el-button size="mini" type="text" icon="el-icon-delete" @click.native.prevent="deleteRow(scope.$index, gckj_standardList)" >删除</el-button >
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

方法：

methods: {
    deleteRow(index, rows) {
      if (rows[index].recid != undefined) {
        delGckj_standard(rows[index].recid).then((res) =>{
          this.getList();
        });
      } else {
        rows.splice(index, 1);//从数组中移除scope.$index的元素
      }
    },
    checkScore(scope){
        var reg=/^(0\.0*[1-9]+[0-9]*$|[1-9]+[0-9]*\.[0-9]*[0-9]$|[1-9]+[0-9]*$)/;
        var isNumberReg=new RegExp(reg);
      if(isNumberReg.test(scope.row.score)){
      }else{
        this.gckj_standardList[scope.$index].score="";//从绑定的：  ：data="gckj_standardList中去改变值"
      }

    },
    /** 查询评审标准列表 */
    getList() {
      this.loading = true;
      listGckj_standard({ bid: this.bid, pztype: this.ptype }).then(
        (response) => {
          this.gckj_standardList = response.rows;
          this.total = response.total;
          this.loading = false;
        }
      );
    },
    handleAdd() {
      this.gckj_standardList.push({
        recid: undefined,
        pztype: this.ptype,
        firstp: undefined,
        secp: undefined,
        thirdp: undefined,
        fourth: undefined,
        zf: undefined,
        score: undefined,
        ssort: undefined,
        bid: this.bid,
      });
    },
  },