Element 的 el-table 表格实现单元格合并

• html 部分

<template><div class="index-wapper"><el-table :data="tableData" :span-method="objectSpanMethod" border><el-table-column v-for="(item, index) in tableHeader" :key="index" :prop="item.prop" :label="item.label":fixed="item.fixed" align="center"></el-table-column></el-table></div>
</template>

• js 部分

<script>
export default {name: "index-page",components: {},props: {},data() {return {tableHeader: [{prop: "country",label: "城市",fixed: true,},{prop: "title",label: "地区",fixed: true,},{prop: "data1",label: "1",fixed: false,},{prop: "data2",label: "2",fixed: false,},{prop: "data3",label: "3",fixed: false,},{prop: "data4",label: "4",fixed: false,},{prop: "data5",label: "5",fixed: false,},],tableData: [{id: 1,country: "杭州",title: "滨江",data1: 0,data2: 1,data3: 0,data4: 1,data5: 0,},{id: 2,country: "杭州",title: "西湖",data1: 0,data2: 0,data3: 0,data4: 0,data5: 0,},{id: 3,country: "杭州",title: "余杭",data1: 0,data2: 1,data3: 0,data4: 1,data5: 1,},{id: 4,country: "长沙",title: "岳麓",data1: 0,data2: 0,data3: 0,data4: 0,data5: 1,},{id: 5,country: "长沙",title: "开福",data1: 1,data2: 1,data3: 0,data4: 1,data5: 0,},],spanArr: [],};},mounted() {this.getSpanArr();},methods: {/*** 合并处理*/getSpanArr() {const hLen = this.tableHeader.length;// i表示行，j表示列for (let i = 0; i < this.tableData.length; i++) {if (i === 0) {for (let j = 0; j < hLen; j++) {this.spanArr[i * hLen + j] = {rowspan: 1,colspan: 1,};}} else {// 当前和上一次的一样，合并所有列的相同数据单元格for (let j = 0; j < hLen; j++) {// 指定合并哪些列if (this.tableHeader[j].prop === "country") {// 哪些不合并，country不一样的，不合并if (this.tableData[i]["country"] !==this.tableData[i - 1]["country"]) {this.spanArr[i * hLen + j] = {rowspan: 1,colspan: 1,};} else if (this.tableData[i][this.tableHeader[j].prop] ===this.tableData[i - 1][this.tableHeader[j].prop]) {let beforeItem = this.spanArr[(i - 1) * hLen + j];this.spanArr[i * hLen + j] = {rowspan: 1 + beforeItem.rowspan, // 合并几列colspan: 1, // 合并几行};beforeItem.rowspan = 0;beforeItem.colspan = 0;} else {this.spanArr[i * hLen + j] = {rowspan: 1,colspan: 1,};}}}}}// 对数据进行倒序let stack = [];for (let i = 0; i < hLen; i++) {for (let j = 0; j < this.tableData.length; j++) {const spanItem = this.spanArr[j * hLen + i];if (spanItem) {if (spanItem.rowspan === 0) {stack.push(spanItem);}if (j !== 0 && spanItem.rowspan !== 0) {stack.push(spanItem);while (stack.length > 0) {let pop = stack.pop();let len = stack.length;this.spanArr[(j - len) * hLen + i] = pop;}}}}}},/*** 表合并规则*/objectSpanMethod({ rowIndex, columnIndex }) {return this.spanArr[rowIndex * this.tableHeader.length + columnIndex];},},watch: {},
};
</script>