应UI小姐姐的需求，要把element-ui表格组件里的展开图标换得美观一点！效果如下：
BERORE：
AFTER：
1.添加css隐藏原有箭头图标：
.el-table__expand-column .cell {
display: none;
}
2.引入自定义图标
这里我引入的是阿里矢量库的图标
<el-table-column label="操作">
<template slot-scope="scope">
<i class="iconfont icon-zhankai"></i>
<i class="iconfont icon-shouqi"></i>
</template>
</el-table-column>3.添加判断控制图标显隐，添加事件控制
1）给每一行表格数据添加expansion属性，默认false
tableData: [{
id: '12987122',
name: '好滋好味鸡蛋仔',
category: '江浙小吃、小吃零食',
desc: '荷兰优质淡奶，奶香浓而不腻',
address: '上海市普陀区真北路',
shop: '王小虎夫妻店',
shopId: '10333',
expansion:false,
}, {
id: '12987123',
name: '好滋好味鸡蛋仔',
category: '江浙小吃、小吃零食',
desc: '荷兰优质淡奶，奶香浓而不腻',
address: '上海市普陀区真北路',
shop: '王小虎夫妻店',
shopId: '10333',
expansion:false,
}, {
id: '12987125',
name: '好滋好味鸡蛋仔',
category: '江浙小吃、小吃零食',
desc: '荷兰优质淡奶，奶香浓而不腻',
address: '上海市普陀区真北路',
shop: '王小虎夫妻店',
shopId: '10333',
expansion:false,
}, {
id: '12987126',
name: '好滋好味鸡蛋仔',
category: '江浙小吃、小吃零食',
desc: '荷兰优质淡奶，奶香浓而不腻',
address: '上海市普陀区真北路',
shop: '王小虎夫妻店',
shopId: '10333',
expansion:false,
}]2）给图标加判断条件和单击触发事件
<el-table-column label="操作">
<template slot-scope="scope">
<i v-show = "!scope.row.expansion" class="iconfont icon-zhankai" @click="expend(scope.row)"></i>
<i v-show = "scope.row.expansion" class="iconfont icon-shouqi" @click="expend(scope.row)" ></i>
</template>
</el-table-column> expend(row){
let $table = this.$refs.table;
this.tableData.map((item) => {
if (row.id != item.id) {
$table.toggleRowExpansion(item, false)
item.expansion = false
}
else{
item.expansion = !item.expansion
}
})
$table.toggleRowExpansion(row);
},完整代码：
<template>
<el-table
ref="table"
:data="tableData"
style="width: 100%">
<el-table-column type="expand">
<template slot-scope="props">
<el-form label-position="left" inline class="demo-table-expand">
<el-form-item label="商品名称">
<span>{{ props.row.name }}</span>
</el-form-item>
<el-form-item label="所属店铺">
<span>{{ props.row.shop }}</span>
</el-form-item>
<el-form-item label="商品 ID">
<span>{{ props.row.id }}</span>
</el-form-item>
<el-form-item label="店铺 ID">
<span>{{ props.row.shopId }}</span>
</el-form-item>
<el-form-item label="商品分类">
<span>{{ props.row.category }}</span>
</el-form-item>
<el-form-item label="店铺地址">
<span>{{ props.row.address }}</span>
</el-form-item>
<el-form-item label="商品描述">
<span>{{ props.row.desc }}</span>
</el-form-item>
</el-form>
</template>
</el-table-column>
<el-table-column
label="商品 ID"
prop="id">
</el-table-column>
<el-table-column
label="商品名称"
prop="name">
</el-table-column>
<el-table-column
label="描述"
prop="desc">
</el-table-column>
<el-table-column
label="操作">
<template slot-scope="scope">
<i v-show = "!scope.row.expansion" class="iconfont icon-zhankai" @click="expend(scope.row)"></i>
<i v-show = "scope.row.expansion" class="iconfont icon-shouqi" @click="expend(scope.row)" ></i>
</template>
</el-table-column>
</el-table>
</template><script>
export default {
data() {
return {
tableData: [{
id: '12987122',
name: '好滋好味鸡蛋仔',
category: '江浙小吃、小吃零食',
desc: '荷兰优质淡奶，奶香浓而不腻',
address: '上海市普陀区真北路',
shop: '王小虎夫妻店',
shopId: '10333',
expansion:false,
}, {
id: '12987123',
name: '好滋好味鸡蛋仔',
category: '江浙小吃、小吃零食',
desc: '荷兰优质淡奶，奶香浓而不腻',
address: '上海市普陀区真北路',
shop: '王小虎夫妻店',
shopId: '10333',
expansion:false,
}, {
id: '12987125',
name: '好滋好味鸡蛋仔',
category: '江浙小吃、小吃零食',
desc: '荷兰优质淡奶，奶香浓而不腻',
address: '上海市普陀区真北路',
shop: '王小虎夫妻店',
shopId: '10333',
expansion:false,
}, {
id: '12987126',
name: '好滋好味鸡蛋仔',
category: '江浙小吃、小吃零食',
desc: '荷兰优质淡奶，奶香浓而不腻',
address: '上海市普陀区真北路',
shop: '王小虎夫妻店',
shopId: '10333',
expansion:false,
}]
}
},
methods:{
expend(row){
let $table = this.$refs.table;
this.tableData.map((item) => {
if (row.id != item.id) {
$table.toggleRowExpansion(item, false)
item.expansion = false
}
else{
item.expansion = !item.expansion
}
})
$table.toggleRowExpansion(row);
},
},
}
</script><style>
.demo-table-expand {
font-size: 0;
}
.demo-table-expand label {
width: 90px;
color: #99a9bf;
}
.demo-table-expand .el-form-item {
margin-right: 0;
margin-bottom: 0;
width: 50%;
}
.el-table__expand-column .cell {
display: none;
}
</style>