vue怎么实现table-plus组件

今天小编给大家分享一下vue怎么实现table-plus组件的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。

目的

• 配置型表格多级表头/自定义表头、形数据与懒加载用法等支持el-table大部分属性和用法

• 内置loading加载

• 内置合并单元格

• 默认跨页选择

• 自定义列模板

• 划重点：后面tableSmart的基础组件

源码

• 包裹层TableWrap.vue

 <template>
  <div :class="s.tableWrap">
    <slot></slot>
    <div :class="s.noData" v-if="!loading && list.length === 0">
      <div>
        <d-icon :class="s.icon" type="no-data"></d-icon>
        <div :class="s.text">{{ text }}</div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
    props: {
        list: {
            type: Array,
            default: [],
        },
        text: {
            type: String,
            default: '搜索不到您想要的数据~换个条件试一下',
        },
        loading: {
            type: Boolean,
            default: false,
        },
    },
    data() {
        return {};
    },
};
</script>

<style lang="scss" module="s">
.tableWrap {
  position: relative;
}
.noData {
  position: absolute;
  top: 50%;
  left: 50%;
  transform:  translate(-50%,-50%);
  > div {
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: center;
  }
  .icon {
    font-size: 60px;
    color: $color-primary;
  }
  .text {
    color: #80848f;
    font-size: 14px;
    margin: 8px 0 16px;
  }
}
</style>

• 核心拓展

<script>
import VTableWrap from './TableWrap.vue';

export default {
    components: {
        VTableWrap,
    },
    props: {
        spanConfig: {
            type: Object,
            default: () => ({
                propList: [],
                children: 'children',
                key: '',
            }),
        },
    },
    data() {
        return {
            domTable: '',
            loading: {},
        };
    },
    computed: {
        list() {
            if (this.spanConfig.key) {
                const arr = [];
                this.$attrs.data.forEach((item) => {
                    if (item[this.spanConfig.children] && item[this.spanConfig.children].length) {
                        item[this.spanConfig.children].forEach((child) => {
                            arr.push({
                                ...item,
                                ...child,
                            });
                        });
                    } else {
                        arr.push({
                            ...item,
                        });
                    }
                });
                return arr;
            }
            return this.$attrs.data;
        },
        // 合并多少个计算
        spanArr() {
            let contactDot = 0;
            const spanArr = [];
            this.list.forEach((item, index) => {
                if (index === 0) {
                    spanArr.push(1);
                } else {
                    if (item[this.spanConfig.key] === this.list[index - 1][this.spanConfig.key]) {
                        spanArr[contactDot] += 1;
                        spanArr.push(0);
                    } else {
                        spanArr.push(1);
                        contactDot = index;
                    }
                }
            });
            return spanArr;
        },
        // 取要合并的index
        spanIndex() {
            const propList = this.$attrs.columns.map((item) => item.prop || item.property);
            return this.spanConfig.propList.map((prop) => (
                propList.findIndex((key) => key === prop)
            ));
        },
    },
    mounted() {
        this.$nextTick(() => {
            // 此处勿使用document 会区找寻windows 作用域下生成的所有dom元素
            this.domTable = this.$refs.table.$el.querySelector('.el-table__body');
            if (this.domTable) {
                this.loading = this.$loading({
                    lock: true,
                    customClass: this.s.customLoding,
                    text: '',
                    spinner: 'el-icon-loading',
                    target: this.$refs.table.$el.querySelector('.el-table__body'),
                });
                // 加载因为 render函数渲染执行 顺序 此处需关闭
                if (this.$attrs.loading === undefined) {
                    this.loading.close();
                } else {
                    this.loading.visible = this.$attrs.loading;
                }
            }
        });
    },
    render(createElement) {
        const { columns = [] } = this.$attrs;
        // 加载
        this.$nextTick(() => {
            this.$refs.table.doLayout();
            if (this.domTable) {
                if (this.$attrs.loading === undefined) {
                    this.loading.close();
                } else {
                    this.loading.visible = this.$attrs.loading;
                }
            }
        });
        // 加上递归
        const tableColumn = (item, index) => createElement(
            'el-table-column',
            {
                props: {
                    ...item,
                },
                key: `${item.label}-${index}`,
                scopedSlots: {
                    default: this.$scopedSlots[item.slotName] || '',
                    header: this.$scopedSlots[item.slotHeaderName] || '',
                },
            },
            [
                item.children
            && item.children.length
            && item.children.map((list, index) => tableColumn(list, index)),
            ],
        );
        const table = createElement(
            'el-table',
            {
                ref: 'table',
                props: {
                    headerRowClassName: 'custom-table-header',
                    'span-method': this.objectSpanMethod,
                    ...this.$attrs,
                    data: this.list,
                },
                on: {
                    ...this.$listeners,
                },
                scopedSlots: {
                    append: this.$scopedSlots.append,
                },
            },
            [...columns.map((item, index) => tableColumn(item, index))],
        );
        return createElement('VTableWrap', {
            props: {
                text: this.$attrs.emptyText,
                loading: this.$attrs.loading,
                list: this.$attrs.data,
            },
        }, [table]);
    },
    methods: {
        objectSpanMethod({
            rowIndex,
            columnIndex,
        }) {
            if (this.spanIndex.includes(columnIndex)) {
                const _row = this.spanArr[rowIndex];
                const _col = _row > 0 ? 1 : 0;
                return {
                    rowspan: _row,
                    colspan: _col,
                };
            }
        },
        clearSelection() {
            this.$refs.table.clearSelection();
        },
        toggleRowSelection(row, selected) {
            this.$refs.table.toggleRowSelection(row, selected);
        },
        toggleAllSelection() {
            this.$refs.table.toggleRowSelection();
        },
        toggleRowExpansion(row, expanded) {
            this.$refs.table.toggleRowExpansion(row, expanded);
        },
        setCurrentRow(row) {
            this.$refs.table.setCurrentRow(row);
        },
        clearSort() {
            this.$refs.table.clearSort();
        },
        clearFilter(columnKey) {
            this.$refs.table.clearFilter(columnKey);
        },
        doLayout() {
            this.$refs.table.doLayout();
        },
        sort(prop, order) {
            this.$refs.table.sort(prop, order);
        },
    },
};
</script>

<style lang="scss" module="s">
.customLoding {
  right: 1px;
  bottom: 1px;
  height: 100%;
  :global(.el-icon-loading){
     display: none;
  }
}
</style>

文档

TablePlus Attributes

TablePlus Events

TablePlus Methods

TablePlus column

TablePlus spanConfig

基本用法

自定义列的显示内容，可组合其他组件使用。

:::demo 通过 Scoped slot 可以获取到 row, column, $index 和 store（table 内部的状态管理）的数据，用法参考 demo。

<div>
  <d-table-plus :columns="columns" :data="tableData">
    <template #date="{row}">
      <i class="el-icon-time"></i>
      <span >{{ row.date }}</span>
    </template>
    <template #handler="{ row }">
      <el-button type="text" size="small" @click="handlerAdd(row)"
        >新增</el-button
      >
      <el-button type="text" size="small">编辑</el-button>
    </template>
  </d-table-plus>
</div>

<script>
  export default {
    data() {
      return {
        columns: [
          {
            label: '日期',
            prop: 'date',
            align: 'center',
            slotName: 'date',
          },
          {
            label: '姓名',
            width: '100px',
            prop: 'name',
            required: true,
            align: 'center',
            formatter: (row) => `${row.name}1111`,
          },
          {
            label: '省份',
            prop: 'province',
          },
          {
            label: '市区',
            prop: 'city',
          },
          {
            label: '地址',
            prop: 'address',
            showOverflowTooltip: true,
          },
          {
            label: '操作',
            type: 'handler',
            width: '150px',
            fixed: 'right',
            slotName: 'handler',
          },
        ],
        tableData: [
          {
            date: '2016-05-02',
            name: '王小虎',
            province: '上海',
            city: '普陀区',
            address: '上海市普陀区金沙江路 1518 弄',
            zip: 200333,
          },
          {
            date: '2016-05-04',
            name: '王小虎',
            province: '上海',
            city: '普陀区',
            address: '上海市普陀区金沙江路 1517 弄',
            zip: 200333,
          },
          {
            date: '2016-05-01',
            name: '王小虎',
            province: '上海',
            city: '普陀区',
            address: '上海市普陀区金沙江路 1519 弄',
            zip: 200333,
          },
          {
            date: '2016-05-03',
            name: '王小虎',
            province: '上海',
            city: '普陀区',
            address: '上海市普陀区金沙江路 1516 弄',
            zip: 200333,
          },
        ],
      };
    },
  };
</script>

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