el-table解决数据过少小于高度有留白的问题

问题:给el-table设置个高度,高度为500px,之后就添加如下4条数据,那么底部就没数据,直接就空白了,本文章就是为了解决这个问题,如果底部留白那么就添加几条空数据就行了.如果数据已达到高度了那么就不会留白了

1.效果

这个空列可以根据高度来决定添加几个空格子去铺满列表，解决列表留白问题

 2.主要代码讲解

2.1为了不影响原始数据,建议在获取到接口列表数据后存入到俩个变量中,一个作为展示一个作为判断添加几行空数据,

        addTable() {
            // 这边就是调用列表的接口之后数据展示
            this.tableData = [
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                },
                {
                    date: '2016-05-04',
                    name: '王小虎',
                    address: '上海市普'
                },
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                }
            ];
            this.tableDataFilter = [
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                },
                {
                    date: '2016-05-04',
                    name: '王小虎',
                    address: '上海市普'
                },
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                }
            ];
            this.$nextTick(() => {
                this.handleTableResize();
            });
        }

2.2监听页面高度发生变化后，需要判断展示几行空数据。

    window.addEventListener('resize', this.handleTableResize); // 监听页面尺寸变化

2.3给每行设置固定的高度,必须要固定死,不然就判断失误了，如果内容过多可以设置show-overflow-tooltip

.el-table /deep/ .el-table__row {
    height: 50px;
}

2.4 关键代码

设置个tableHeight：初始值为0

整个表格的高度，给el-table绑定一个ref，名字叫algorithmRef

this.$refs.algorithmRef.$el.clientHeight

整个表格还剩下的留白的高度，这个-100是减去表头，-50是上面设置的一行的高度之后，50 * this.tableDataFilter.lengt，这个就是有数据的行高度，最后得出表格剩下留白高度

  height = this.tableHeight - 100 - 50 * this.tableDataFilter.length;

 result：要添加几行空白给表格数据

最后把空数据添加到tableData中

    getTableHeight() {
            this.tableHeight = this.$refs.algorithmRef.$el.clientHeight;
            let height = 0;
            height = this.tableHeight - 100 - 50 * this.tableDataFilter.length;
            const result = Math.floor(height / 50);
            this.tableAdd(result);
            console.log(result, '要传给tableAdd的值'); 
        },
        tableAdd(num) {
            let addTable = [];
            for (let i = 0; i < num; i++) {
                addTable.push({ date: '', name: '', address: '' });
            }
            this.tableData = [...this.tableDataFilter, ...addTable];
        },

3.完整代码

 
<template>
    <div class="container-table" ref="paramRef">
        <el-button @click="addTable()">添加el-button>
        <div class="table-box">
            <el-table
                border
                :cell-style="{ borderColor: '#C0C0C0' }"
                :header-cell-style="{ borderColor: '#c0c0c0' }"
                :data="tableData"
                stripe
                height="100%"
                @resize="handleTableResize"
                style="width: 100%"
                ref="algorithmRef"
                class="tablebox"
            >
                <el-table-column show-overflow-tooltip label="自动数据" align="center">
                    <el-table-column prop="date" label="日期" width="180"> el-table-column>
                    <el-table-column prop="name" label="姓名" width="180"> el-table-column>
                el-table-column>
                <el-table-column label="人工数据" align="center">
                    <el-table-column prop="address" label="地址"> el-table-column>
                    <el-table-column prop="date" label="日期" width="180"> el-table-column>
                    <el-table-column prop="name" label="姓名" width="180"> el-table-column>
                el-table-column>
            el-table>
        div>
    div>
template>
 
<script>
export default {
    data() {
        return {
            tableData: [],
            tableDataFilter: [],
            tableHeight: 0 // 行高
        };
    },
    mounted() {
        // setTimeout(() => {
        // }, 1000);
        this.$nextTick(() => {
            this.getTableHeight(); // 监听el-table尺寸变化事件，重新获取表格高度
            window.addEventListener('resize', this.handleTableResize); // 监听页面尺寸变化
        });
    },
    methods: {
        handleTableResize() {
            this.$nextTick(() => {
                this.getTableHeight(); // 监听el-table尺寸变化事件，重新获取表格高度
            });
            // this.tableHeight = this.$refs.dynamicTable.$el.clientHeight;
            // console.log();
        },
        getTableHeight() {
            this.tableHeight = this.$refs.algorithmRef.$el.clientHeight;
            let height = 0;
            // 留白的高度
            height = this.tableHeight - 100 - 50 * this.tableDataFilter.length;
            const result = Math.floor(height / 50);
            this.tableAdd(result);
            console.log(result, '要传给tableAdd的值');
        },
        tableAdd(num) {
            let addTable = [];
            for (let i = 0; i < num; i++) {
                addTable.push({ date: '', name: '', address: '' });
            }
            this.tableData = [...this.tableDataFilter, ...addTable];
        },
        handlePageResize() {
            this.$nextTick(() => {
                this.getTableHeight(); // 页面尺寸变化后重新获取表格高度
            });
        },
        addTable() {
            // 这边就是调用列表的接口之后数据展示
            this.tableData = [
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                },
                {
                    date: '2016-05-04',
                    name: '王小虎',
                    address: '上海市普'
                },
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                },
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                },
                {
                    date: '2016-05-04',
                    name: '王小虎',
                    address: '上海市普'
                }
            ];
            this.tableDataFilter = [
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                },
                {
                    date: '2016-05-04',
                    name: '王小虎',
                    address: '上海市普'
                },
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                },
                {
                    date: '2016-05-02',
                    name: '王小虎',
                    address: '上海市普陀'
                },
                {
                    date: '2016-05-04',
                    name: '王小虎',
                    address: '上海市普'
                }
            ];
            this.$nextTick(() => {
                this.handleTableResize();
            });
        }
    }
};
script>
 
<style lang="scss" scoped>
.container-table {
    height: 70vh;
    width: 890px;
    background-color: #fff;
    .table-box {
        height: 70%;
        width: 100%;
    }
}
::v-deep .el-table .el-table__body--striped .el-table__row:nth-child(even) {
    background-color: #f7f7f7; /* 设置偶数行的背景色 */
}
.tablebox {
    border: 1px solid #c0c0c0;
}
/deep/ .el-table::after {
    width: 0;
}
/deep/ .el-table::before {
    height: 0;
}
 
// 这是关键,设置表格的每一行的高度,必须要固定死,如果内容过多可以设置show-overflow-tooltip
.el-table /deep/ .el-table__row {
    height: 50px;
}
/deep/ .el-table tbody tr td:nth-child(5),
/deep/ .el-table thead tr th:nth-child(5) {
    border-right: none;
}
/deep/ table thead tr:first-of-type th:nth-child(2) {
    border-right: none;
}
style>