2<el-table-column prop="principal"> 3 <!-- 表头插槽 --> 4 <template #header> 5 <!-- 小提示框 --> 6 <el-tooltip :disabled="isShowTooltip" content="Principal Repayment" placement="top"> 7 <!-- 单行省略样式、鼠标移入事件 --> 8 <div class="singe-line" @mouseover="onMouseOver(...