<template><el-table :data="tableData" style="width: 100%" height="250"><el-table-columnfixedprop="date"label="日期"width="150"></el-table-column><el-table-columnprop="name"label="姓名"width="120"></el-table-column><el-table-column prop="message" label="描述" width="120" ><template slot-scope="scope"><div><span :key="scope.row.isExpand+row.$index" class="multi-line" :style="{'-webkit-line-clamp': scope.row.isExpand}">{{ scope.row.message }}</span><el-buttonv-if="scope.row.message.length>500"type="text"size="mini":icon="scope.row.icon"@click="expand(scope.row)">{{ scope.row.isExpandContent }}</el-button></div></template></el-table-column></el-table>
</template>

<script>
export default {data() {return {tableData: [{date: '2016-05-03',name: '王小虎',isExpandContent: '展开',isExpand: 5,message: '超多文本超多文本超多文本',}, {date: '2016-05-02',name: '王小虎',isExpandContent: '展开',isExpand: 5,message: '超多文本超多文本超多文本',}]}},methods: {expand (row) {if (row.isExpandContent === '展开'){this.$set(row,'isExpandContent','收起')this.$set(row,'isExpand','')this.$set(row,'icon','icon-arrow-up')} else {this.$set(row,'isExpandContent','展开')this.$set(row,'isExpand',5)this.$set(row,'icon','icon-arrow-right')}},}
}
</script>

<style lang="scss" scoped>
.multi-line{word-break: break-all;text-overflow: ellipsis;display: -webkit-box;-webkit-box-orient: vertical;overflow: hidden;
}
</style>

可根据代码升级优化