show-overflow-tooltip

true：當(dāng)內(nèi)容過長被隱藏時(shí)顯示 tooltip
false：默認(rèn)值

<el-table-column label="文件路徑" prop="filePath" align="center" width="220" show-overflow-tooltip=true>
</el-table-column>

也可以結(jié)合el-popover組件自己來實(shí)現(xiàn)

    <el-table-column label="文件路徑" prop="filePath" align="center" width="220">
          <template slot-scope="scope">
            <el-popover placement="top-start" title="文件路徑" width="250" trigger="hover" >
              <div>{{scope.row.filePath}}</div>
                <span slot="reference">{{ scope.row.filePath.substr(0,30)+'...' }}</span>
            </el-popover>
          </template>
    </el-table-column>