需求说明：
1、第一行不参与排序
2、实现带%排序
3、实现null值排序
4、实现值相等不排序
5、实现含有占位符‘–‘排序放到最后
效果图如下：
<template>
<div>
<template>
<el-table border :data="previewTableData" style="width:80%;margin:100px auto;" @sort-change="sortChange">
<el-table-column :sortable="item.val=='showcityname'?false:'custom'" v-for="(item,index) in tableTitle" :prop="item.val" :label="item.name">
</el-table-column>
</el-table>
</template>
</div>
</template>
<script>
export default {
data() {
return {
tableTitle: [{
name: "地区",
val: "showcityname",
},
{
name: "全为空",
val: "date",
},
{
name: "数量",
val: "num",
},
{
name: "包含--",
val: "address",
},
{
name: "包含null",
val: "tag",
},
{
name: "包含%",
val: "bai",
},
],
previewTableData: [{
date: null,
num: 90,
address: "--",
tag: 2,
bai: "100%",
all: 1,
showcityname: "重庆"
},
{
date: null,
num: 22,
address: 1,
tag: null,
bai: "5%",
all: 1,
showcityname: "南岸"
},
{
date: null,
num: 3,
address: 3,
tag: 30,
bai: null,
all: 1,
showcityname: "江北"
},
{
date: null,
num: 45,
address: 2,
tag: 11,
bai: "-2.4%",
all: 1,
showcityname: "渝北"
},
{
date: null,
num: 5,
address: "--",
tag: 49,
bai: "-8%",
all: 1,
showcityname: "九龙坡"
},
{
date: null,
num: 6,
address: "--",
tag: null,
bai: null,
all: 1,
showcityname: "巴南"
},
],
// 复制一份数据
previewTableDataClone: [{
date: null,
num: 90,
address: "--",
tag: 2,
bai: "100%",
all: 1,
showcityname: "重庆"
},
{
date: null,
num: 22,
address: 1,
tag: null,
bai: "5%",
all: 1,
showcityname: "南岸"
},
{
date: null,
num: 3,
address: 3,
tag: 30,
bai: null,
all: 1,
showcityname: "江北"
},
{
date: null,
num: 45,
address: 2,
tag: 11,
bai: "-2.4%",
all: 1,
showcityname: "渝北"
},
{
date: null,
num: 5,
address: "--",
tag: 49,
bai: "-8%",
all: 1,
showcityname: "九龙坡"
},
{
date: null,
num: 6,
address: "--",
tag: null,
bai: null,
all: 1,
showcityname: "巴南"
},
],
};
},
created() {},
methods: {
sortChange({
column,
prop,
order
}) {
let arr = [];
let obj = {};
console.log(column);
console.log(prop);
console.log(order);
let nullArr = [];
let otherArr = [];
//判断是否都为null,true不执行排序，反之排序
let flag = this.previewTableData.every((item) => !item[prop]);
let equalVal = this.previewTableData.map((item) => item[prop]);
let equalValFlag = false;
//判断是否每个值都相等
if (equalVal.length) {
//和第一个值进行比较
equalValFlag = equalVal.every((item) => item == equalVal[0]);
}
console.log(equalValFlag, "equalValFlag", flag, "flag");
if (!flag && !equalValFlag) {
console.log("我执行了");
this.previewTableData.forEach((item, index) => {
if (item.showcityname == "重庆") {
console.log(item.showcityname);
obj = item;
}
});
if (!this.previewTableData.length) return;
if (order == "ascending") {
this.previewTableData.forEach((item) => {
if (item[prop] && item[prop] !== "--") {
otherArr.push(item);
} else {
nullArr.push(item);
}
});
// this.previewTableData = [...otherArr,...nullArr]
this.previewTableData = otherArr.sort((a, b) => {
if ((a[prop] + "").includes("%") || (b[prop] + "").includes("%")) {
return a[prop].replace("%", "") - b[prop].replace("%", "");
} else {
return a[prop] - b[prop];
}
}).concat(nullArr);
this.previewTableData.forEach((item, index) => {
if (item.showcityname == "重庆") {
this.previewTableData.splice(index, 1);
}
});
if (!Object.keys(obj).length) return;
this.previewTableData.unshift(obj);
} else if (order == "descending") {
this.previewTableData.forEach((item) => {
if (item[prop] && item[prop] !== "--") {
otherArr.push(item);
} else {
nullArr.push(item);
}
});
// this.previewTableData = [...otherArr,...nullArr]
this.previewTableData = otherArr
.sort((a, b) => {
if (
(a[prop] + "").includes("%") ||
(b[prop] + "").includes("%")
) {
return b[prop].replace("%", "") - a[prop].replace("%", "");
} else {
return b[prop] - a[prop];
}
})
.concat(nullArr);
this.previewTableData.forEach((item, index) => {
if (item.showcityname == "重庆") {
this.previewTableData.splice(index, 1);
}
});
if (!Object.keys(obj).length) return;
this.previewTableData.unshift(obj);
} else {
// this.previewTableDataClone是在接口得到表格数据的时候拷贝了一份，用来还原取消排序时的表格数据
this.previewTableData = this.previewTableDataClone
}
}
},
},
};
</script>
<style lang="less" scoped>
/deep/.elx-header--column.col--ellipsis>.elx-cell .elx-cell--title {
overflow: hidden;
text-overflow: ellipsis;
white-space: pre-wrap;
}
</style>
