关于el-col的使用,占据宽度的应用解析

<el-row v-for="(item, index) in detailInfo" :key="index" type="flex">
      <el-col :class="index===detailInfo.length - 1 ? 'left last-right' : 'left'" :span="5">{{item.name}}</el-col>
      <el-col :class="index===detailInfo.length - 1 ? 'right last-right' : 'right'" :span="19" :show-overflow-tooltip="true">
        <span style="color:#70B603;" v-if="item.name === $t('pages.authorityMgt.sendRes')&&item.val==='成功'">{{item.val}}</span>
        <span style="color:#D9001B;" v-if="item.name === $t('pages.authorityMgt.sendRes')&&item.val==='失败'">{{item.val}}</span>
        <span style="color:#02A7F0;"  v-if="item.name === $t('pages.authorityMgt.sendRes')&&item.val==='下发中'">{{item.val}}</span>
        <div style="position:relative; overflow: auto; width: 580px; height: 40px;"><span style="color: #606266;"  v-if="item.name === $t('pages.authorityMgt.fileCause')">{{item.val}}</span></div>
        <span v-if="item.val!=='成功' && item.val!=='失败' && item.val!=='下发中' && item.name !==$t('pages.authorityMgt.fileCause')">{{item.val}}</span>
      </el-col>
</el-row>