elementUI el-table-column宽度设置为百分比

给el-table-column标签设置 mimn-width即可

 <el-table
        :data="tableData"
        style="width: 100%"
        :default-sort="{prop: 'date', order: 'descending'}"
      >
        <el-table-column prop="name" label="模板名称" sortable min-width="25%"></el-table-column>
        <el-table-column prop="create_time" label="创建时间" sortable min-width="25%"></el-table-column>
        <el-table-column prop="createUser" label="创建人" sortable min-width="25%"></el-table-column>
        <el-table-column prop label="操作" min-width="25%"></el-table-column>
      </el-table>