记录一下问题

1、table组件的列是循环出来的，其中有一个按钮时下载

      <template v-for="(action,index) in value.actions">
      <el-button  type="primary" plain v-if="action.text=='编辑'" @click="$emit(action.method,{row:scope.row,column:scope.column,index:scope.$index})">编辑</el-button>
      <el-button type="danger" plain v-if="action.text=='删除'" @click="$emit(action.method,{row:scope.row,column:scope.column,index:scope.$index})">删除</el-button>
      <a :href="url"  v-if="action.text=='下载'" @click="$emit(action.method,{row:scope.row,column:scope.column,index:scope.$index})">
        <el-button type="success" plain>下载</el-button>
      </a>
      <el-button  type="warning" plain v-if="action.text=='查看'" @click="$emit(action.method,{row:scope.row,column:scope.column,index:scope.$index})">查看</el-button>
      <i class="el-icon-zoom-in" title="查看详情" v-if="action.text=='放大镜'" @click="$emit(action.method,{row:scope.row,column:scope.column,index:scope.$index})"></i>
      <!-- <i class="detail" v-if="action.text=='查看'" @click="$emit(action.method,{row:scope.row,column:scope.column,index:scope.$index})">查看详情</i> -->
    </template>

a标签的，在父页面

  <standard-table
            v-loading="loading"
            :layout="'prev, pager, next'"
            :columns="cla_columns"
            :pagination='pagination'
            :url="downloadUrl"
            :data="sourceData.slice((pagination.current_page-1)*pagination.page_size,pagination.current_page*pagination.page_size)"
            @current-change="current_change"
    @search="searchDetail"
    @download="downloadSource"
    @delete="deleteSource"
            
        ></standard-table>

js部分

 // 下载素材
 downloadSource:function(row){
  this.downloadUrl=window.g.apiUrl+'/Materialapi/download?material_id='+row.row.material_id
  console.log(this.downloadUrl)
},

输出的地址是用网页打开是下载文件，但是执行的时候是刷新页面，查了一下，a标签的href和onclick事件同时存在时，先执行的是onclick事件，这里用到了组件，也许跟组件到页面渲染有关