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這篇“如何用Vue3實現可復制表格”文章的知識點大部分人都不太理解,所以小編給大家總結了以下內容,內容詳細,步驟清晰,具有一定的借鑒價值,希望大家閱讀完這篇文章能有所收獲,下面我們一起來看看這篇“如何用Vue3實現可復制表格”文章吧。
最基礎基礎的表格封裝所要做的事情就是讓用戶只關注行和列的數據,而不需要關注 DOM
結構是怎樣的,我們可以參考 AntDesign
,columns
dataSource
這兩個屬性是必不可少的,代碼如下:
import { defineComponent } from 'vue' import type { PropType } from 'vue' interface Column { title: string; dataIndex: string; slotName?: string; } type TableRecord = Record<string, unknown>; export const Table = defineComponent({ props: { columns: { type: Array as PropType<Column[]>, required: true, }, dataSource: { type: Array as PropType<TableRecord[]>, default: () => [], }, rowKey: { type: Function as PropType<(record: TableRecord) => string>, } }, setup(props, { slots }) { const getRowKey = (record: TableRecord, index: number) => { if (props.rowKey) { return props.rowKey(record) } return record.id ? String(record.id) : String(index) } const getTdContent = ( text: any, record: TableRecord, index: number, slotName?: string ) => { if (slotName) { return slots[slotName]?.(text, record, index) } return text } return () => { return ( <table> <tr> {props.columns.map(column => { const { title, dataIndex } = column return <th key={dataIndex}>{title}</th> })} </tr> {props.dataSource.map((record, index) => { return ( <tr key={getRowKey(record, index)}> {props.columns.map((column, i) => { const { dataIndex, slotName } = column const text = record[dataIndex] return ( <td key={dataIndex}> {getTdContent(text, record, i, slotName)} </td> ) })} </tr> ) })} </table> ) } } })
需要關注一下的是 Column
中有一個 slotName
屬性,這是為了能夠自定義該列的所需要渲染的內容(在 AntDesign
中是通過 TableColumn
組件實現的,這里為了方便直接使用 slotName
)。
首先我們可以手動選中表格復制嘗試一下,發現表格是支持選中復制的,那么實現思路也就很簡單了,通過代碼選中表格再執行復制命令就可以了,代碼如下:
export const Table = defineComponent({ props: { // ... }, setup(props, { slots, expose }) { // 新增,存儲table節點 const tableRef = ref<HTMLTableElement | null>(null) // ... // 復制的核心方法 const copy = () => { if (!tableRef.value) return const range = document.createRange() range.selectNode(tableRef.value) const selection = window.getSelection() if (!selection) return if (selection.rangeCount > 0) { selection.removeAllRanges() } selection.addRange(range) document.execCommand('copy') } // 將復制方法暴露出去以供父組件可以直接調用 expose({ copy }) return (() => { return ( // ... ) }) as unknown as { copy: typeof copy } // 這里是為了讓ts能夠通過類型校驗,否則調用`copy`方法ts會報錯 } })
這樣復制功能就完成了,外部是完全不需要關注如何復制的,只需要調用組件暴露出去的 copy
方法即可。
雖然復制功能很簡單,但是這也僅僅是復制文字,如果表格中有一些不可復制元素(如圖片),而復制時需要將這些替換成對應的文字符號,這種該如何實現呢?
解決思路就是在組件內部定義一個復制狀態,調用復制方法時把狀態設置為正在復制,根據這個狀態渲染不同的內容(非復制狀態時渲染圖片,復制狀態是渲染對應的文字符號),代碼如下:
export const Table = defineComponent({ props: { // ... }, setup(props, { slots, expose }) { const tableRef = ref<HTMLTableElement | null>(null) // 新增,定義復制狀態 const copying = ref(false) // ... const getTdContent = ( text: any, record: TableRecord, index: number, slotName?: string, slotNameOnCopy?: string ) => { // 如果處于復制狀態,則渲染復制狀態下的內容 if (copying.value && slotNameOnCopy) { return slots[slotNameOnCopy]?.(text, record, index) } if (slotName) { return slots[slotName]?.(text, record, index) } return text } const copy = () => { copying.value = true // 將復制行為放到 nextTick 保證復制到正確的內容 nextTick(() => { if (!tableRef.value) return const range = document.createRange() range.selectNode(tableRef.value) const selection = window.getSelection() if (!selection) return if (selection.rangeCount > 0) { selection.removeAllRanges() } selection.addRange(range) document.execCommand('copy') // 別忘了把狀態重置回來 copying.value = false }) } expose({ copy }) return (() => { return ( // ... ) }) as unknown as { copy: typeof copy } } })
最后我們可以寫一個demo測一下功能是否正常,代碼如下:
<template> <button @click="handleCopy">點擊按鈕復制表格</button> <c-table :columns="columns" :data-source="dataSource" border="1" ref="table" > <template #status> <img class="status-icon" :src="arrowUpIcon" /> </template> <template #statusOnCopy> → </template> </c-table> </template> <script setup lang="ts"> import { ref } from 'vue' import { Table as CTable } from '../components' import arrowUpIcon from '../assets/arrow-up.svg' const columns = [ { title: '序號', dataIndex: 'serial' }, { title: '班級', dataIndex: 'class' }, { title: '姓名', dataIndex: 'name' }, { title: '狀態', dataIndex: 'status', slotName: 'status', slotNameOnCopy: 'statusOnCopy' } ] const dataSource = [ { serial: 1, class: '三年級1班', name: '張三' }, { serial: 2, class: '三年級2班', name: '李四' }, { serial: 3, class: '三年級3班', name: '王五' }, { serial: 4, class: '三年級4班', name: '趙六' }, { serial: 5, class: '三年級5班', name: '宋江' }, { serial: 6, class: '三年級6班', name: '盧俊義' }, { serial: 7, class: '三年級7班', name: '吳用' }, { serial: 8, class: '三年級8班', name: '公孫勝' }, ] const table = ref<InstanceType<typeof CTable> | null>(null) const handleCopy = () => { table.value?.copy() } </script> <style scoped> .status-icon { width: 20px; height: 20px; } </style>
附上完整代碼:
import { defineComponent, ref, nextTick } from 'vue' import type { PropType } from 'vue' interface Column { title: string; dataIndex: string; slotName?: string; slotNameOnCopy?: string; } type TableRecord = Record<string, unknown>; export const Table = defineComponent({ props: { columns: { type: Array as PropType<Column[]>, required: true, }, dataSource: { type: Array as PropType<TableRecord[]>, default: () => [], }, rowKey: { type: Function as PropType<(record: TableRecord) => string>, } }, setup(props, { slots, expose }) { const tableRef = ref<HTMLTableElement | null>(null) const copying = ref(false) const getRowKey = (record: TableRecord, index: number) => { if (props.rowKey) { return props.rowKey(record) } return record.id ? String(record.id) : String(index) } const getTdContent = ( text: any, record: TableRecord, index: number, slotName?: string, slotNameOnCopy?: string ) => { if (copying.value && slotNameOnCopy) { return slots[slotNameOnCopy]?.(text, record, index) } if (slotName) { return slots[slotName]?.(text, record, index) } return text } const copy = () => { copying.value = true nextTick(() => { if (!tableRef.value) return const range = document.createRange() range.selectNode(tableRef.value) const selection = window.getSelection() if (!selection) return if (selection.rangeCount > 0) { selection.removeAllRanges() } selection.addRange(range) document.execCommand('copy') copying.value = false }) } expose({ copy }) return (() => { return ( <table ref={tableRef}> <tr> {props.columns.map(column => { const { title, dataIndex } = column return <th key={dataIndex}>{title}</th> })} </tr> {props.dataSource.map((record, index) => { return ( <tr key={getRowKey(record, index)}> {props.columns.map((column, i) => { const { dataIndex, slotName, slotNameOnCopy } = column const text = record[dataIndex] return ( <td key={dataIndex}> {getTdContent(text, record, i, slotName, slotNameOnCopy)} </td> ) })} </tr> ) })} </table> ) }) as unknown as { copy: typeof copy } } })
以上就是關于“如何用Vue3實現可復制表格”這篇文章的內容,相信大家都有了一定的了解,希望小編分享的內容對大家有幫助,若想了解更多相關的知識內容,請關注億速云行業資訊頻道。
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