基於Svelte3.x開發pc網頁版自定義彈窗元件svelteLayer。
svelte-layer：基於svelte.js輕量級多功能pc桌面端對話方塊元件。支援多種彈窗型別、30+引數隨意組合配置，整合了拖拽/四周縮放/最大化/記憶彈窗位置/全屏/自定義層級等功能。
svelteLayer功能效果上有些類似layer.js外掛。
◆ 快速引入
在需要使用元件功能的頁面，引入元件。
import Layer, {svLayer} from '$lib/Layer'
svelteLayer支援標籤式+函式式兩種呼叫方式。
- 標籤式呼叫
<!-- 詢問框 --> <Layer bind:open={showConfirm} shadeClose="false" title="警告資訊" xclose zIndex="2001" lockScroll={false} resize dragOut content="<div style='color:#00e0a1;padding:20px 40px;'>這裡是確認框提示資訊</div>" btns={[ {text: '取消', click: () => showConfirm=false}, {text: '確定', style: 'color:#e63d23;', click: handleInfo}, ]} />
- 函式式呼叫
function handleInfo(e) { let el = svLayer({ title: '標題', content: `<div style="padding:20px;"> <p>函式式呼叫：<em style="color:#999;">svLayer({...})</em></p> </div>`, resize: true, btns: [ { text: '取消', click: () => { // 關閉彈窗 el.$set({open: false}) } }, { text: '確認', style: 'color:#09f;', click: () => { svLayer({ type: 'toast', icon: 'loading', content: '載入中...', opacity: .2, time: 2 }) } }, ] }) }
支援標籤式和函式式混合搭配呼叫，還支援如上圖動態載入外部元件。
◆ 引數配置
svelte-layer預設支援如下引數自定義配置。
<script context="module"> let index = 0 // 用於控制倒數計時臨時索引 let lockNum = 0 // 用於控制鎖定螢幕臨時索引 </script> <script> // 是否開啟彈窗bind:open={showDialog} export let open = false // 彈窗標識 export let id = undefined // 標題 export let title = '' // 內容 export let content = '' // 彈窗型別 export let type = '' // 自定義樣式 export let layerStyle = undefined // 自定義類名 export let customClass = '' // toast圖示 export let icon = '' // 是否顯示遮罩層 export let shade = true // 點選遮罩層關閉 export let shadeClose = true // 鎖定螢幕 export let lockScroll = true // 遮罩層透明度 export let opacity = '' // 是否顯示關閉圖示 export let xclose = false // 關閉圖示位置 export let xposition = 'right' // 關閉圖示顏色 export let xcolor = '#000' // 彈窗動畫 export let anim = 'scaleIn' // 彈出位置（auto | ['100px','50px'] | t | r | b | l | lt | rt | lb | rb） export let position = 'auto' // 抽屜彈窗 export let drawer = '' // 右鍵彈窗定位 export let follow = null // 彈窗自動關閉時間 export let time = 0 // 彈窗層級 export let zIndex = 202204 // 置頂彈窗 export let topmost = false // 彈窗大小 export let area = 'auto' // 彈窗最大寬度 export let maxWidth = 375 // 彈窗是否最大化 export let maximize = false // 彈窗是否全屏 export let fullscreen = false // 是否固定 export let fixed = true // 是否拖拽 export let drag = '.vlayer__wrap-tit' // 是否拖拽螢幕外 export let dragOut = false // 限制拖拽方向 vertical|horizontal export let dragDir = '' // 拖拽結束回撥 {width: 120, height: 120, x: 100, y: 100} export let dragEnd = undefined // 是否縮放 export let resize = false // 彈窗按鈕事件 export let btns = null /*export let btns = [ {text: '取消', style: 'color:red', disabled: true, click: null}, {text: '確定', style: 'color:blue', click: null} ]*/ // 函式式開啟|關閉回撥 export let onOpen = undefined export let onClose = undefined export let beforeClose = undefined // 接收函式移除指令 export let remove = undefined import { onMount, afterUpdate, createEventDispatcher, tick } from 'svelte' const dispatch = createEventDispatcher() // ... </script>
彈窗模板及核心邏輯處理。
<div class="vui__layer" class:opened class:vui__layer-closed={closeCls} id={id} bind:this={el}> <!-- 遮罩層 --> {#if bool(shade)}<div class="vlayer__overlay" on:click={shadeClicked} style:opacity></div>{/if} <!-- 主體 --> <div class="vlayer__wrap {type&&'popui__'+type} anim-{anim}" style="{layerStyle}"> {#if title}<div class="vlayer__wrap-tit">{@html title}</div>{/if} {#if icon&&type=='toast'}<div class="vlayer__toast-icon vlayer__toast-{icon}">{@html toastIcon[icon]}</div>{/if} <div class="vlayer__wrap-cntbox"> <!-- 判斷content插槽是否存在 --> {#if $$slots.content} <div class="vlayer__wrap-cnt"><slot name="content" /></div> {:else} {#if content} <!-- iframe --> {#if type=='iframe'} <div class="vlayer__wrap-iframe"> <iframe scrolling="auto" allowtransparency="true" frameborder="0" src={content}></iframe> </div> <!-- message|notify|popover --> {:else if type=='message' || type=='notify' || type=='popover'} <div class="vlayer__wrap-cnt"> {#if icon}<i class="vlayer-msg__icon {icon}">{@html messageIcon[icon]}</i>{/if} <div class="vlayer-msg__group"> {#if title}<div class="vlayer-msg__title">{@html title}</div>{/if} <div class="vlayer-msg__content">{@html content}</div> </div> </div> <!-- 載入動態元件 --> {:else if type == 'component'} <svelte:component this={content}/> {:else} <div class="vlayer__wrap-cnt">{@html content}</div> {/if} {/if} {/if} <slot /> </div> <!-- 按鈕組 --> {#if btns} <div class="vlayer__wrap-btns"> {#each btns as btn,index} <span class="btn" class:btn-disabled={btn.disabled} style="{btn.style}">{@html btn.text}</span> {/each} </div> {/if} {#if xclose} <span class="vlayer__xclose" style="color: {xcolor}" on:click={hide}></span> {/if} {#if maximize}<span class="vlayer__maximize" on:click={maximizeClicked}></span>{/if} <!-- 縮放 --> {#if resize} <span class="vlayer__groupresize"> <i class="vlayer__resize LT"></i> <i class="vlayer__resize RT"></i> <i class="vlayer__resize LB"></i> <i class="vlayer__resize RB"></i> </span> {/if} </div> <!-- 優化拖拽卡頓 --> <div class="vlayer__dragfix"></div> </div> <script> /** * @Desc Svelte.js桌面端對話方塊元件SvelteLayer * @Time andy by 2022-04 * @About Q：282310962 wx：xy190310 */ // ... onMount(() => { console.log('監聽彈窗開啟') window.addEventListener('resize', autopos, false) return () => { console.log('監聽彈窗關閉') window.removeEventListener('resize', autopos, false) } }) afterUpdate(() => { console.log('監聽彈窗更新') }) // 動態監聽開啟/關閉 $: if(open) { show() }else { hide() } /** * 開啟彈窗 */ async function show() { if(opened) return opened = true dispatch('open') typeof onOpen === 'function' && onOpen() // 避免獲取彈窗寬高不準確 await tick() zIndex = util.getZIndex(zIndex) + 1 auto() } /** * 關閉彈窗 */ function hide() { // ... } // 彈窗位置 function auto() { autopos() // 全屏彈窗 if(fullscreen) { full() } // 拖拽|縮放 move() } // 彈窗定位 function autopos() { if(!opened) return let ol, ot let pos = position let isfixed = bool(fixed) let vlayero = el.querySelector('.vlayer__wrap') if(!isfixed || follow) { vlayero.style.position = 'absolute' } let area = [util.client('width'), util.client('height'), vlayero.offsetWidth, vlayero.offsetHeight] ol = (area[0] - area[2]) / 2 ot = (area[1] - area[3]) / 2 if(follow) { offset() }else { typeof pos === 'object' ? ( ol = parseFloat(pos[0]) || 0, ot = parseFloat(pos[1]) || 0 ) : ( pos == 't' ? ot = 0 : pos == 'r' ? ol = area[0] - area[2] : pos == 'b' ? ot = area[1] - area[3] : pos == 'l' ? ol = 0 : pos == 'lt' ? (ol = 0, ot = 0) : pos == 'rt' ? (ol = area[0] - area[2], ot = 0) : pos == 'lb' ? (ol = 0, ot = area[1] - area[3]) : pos == 'rb' ? (ol = area[0] - area[2], ot = area[1] - area[3]) : null ) vlayero.style.left = parseFloat(isfixed ? ol : util.scroll('left') + ol) + 'px' vlayero.style.top = parseFloat(isfixed ? ot : util.scroll('top') + ot) + 'px' } } // 跟隨定位 function offset() { let ow, oh, ps let vlayero = el.querySelector('.vlayer__wrap') ow = vlayero.offsetWidth oh = vlayero.offsetHeight ps = util.getFollowRect(follow, ow, oh) tipArrow = ps[2] vlayero.style.left = ps[0] + 'px' vlayero.style.top = ps[1] + 'px' } // 最大化彈窗 async function full() { // ... } // 復位彈窗 async function restore() { // ... } // 拖拽縮放 function move() { let isfixed = bool(fixed) let isdragOut = bool(dragOut) let c = {} let vlayero = el.querySelector('.vlayer__wrap') let otit = el.querySelector('.vlayer__wrap-tit') let ocnt = el.querySelector('.vlayer__wrap-cntbox') let obtn = el.querySelector('.vlayer__wrap-btns') let odrag = el.querySelector(drag) let oresize = el.querySelectorAll('.vlayer__resize') let ofix = el.querySelector('.vlayer__dragfix') // 拖拽 if(odrag) { odrag.style.cursor = util.isIE() ? 'move' : 'grab' util.on(odrag, 'mousedown', function(e) { // ... }) } util.on(document, 'mousemove', function(e) { if(c.dragTrigger) { let iL = e.clientX - c.pos[0] + c.area[0] let iT = e.clientY - c.pos[1] + c.area[1] let fixL = isfixed ? 0 : c.scroll[1] let fixT = isfixed ? 0 : c.scroll[2] let iMaxL = c.client[0] + fixL - c.area[2] let iMaxT = c.client[1] + fixT - c.area[3] let oMaxT = c.scroll[0] - c.area[3] // 邊界檢測 if(isdragOut) { iT = iT < 0 ? 0 : iT iT = (iT > oMaxT) ? oMaxT : iT }else { iL = (iL < fixL) ? fixL : iL iL = (iL > iMaxL) ? iMaxL : iL iT = (iT < fixT) ? fixT : iT iT = (iT > iMaxT) ? iMaxT : iT } // 記錄拖拽彈窗座標 c.dragPosition = { width: c.area[2], height: c.area[3], x: iL, y: iT } // 限制拖拽方向 dragDir == 'horizontal' ? (vlayero.style.left = iL + 'px') : dragDir == 'vertical' ? (vlayero.style.top = iT + 'px') : (vlayero.style.left = iL + 'px', vlayero.style.top = iT + 'px') } // 邊角縮放 if(c.resizeTrigger && c.elem) { // ... } }) util.on(document, 'mouseup', function() { c.dragTrigger && ( delete c.dragTrigger, ofix.style.display = 'none', typeof dragEnd === 'function' && dragEnd(dragPosition) ) c.resizeTrigger && ( delete c.resizeTrigger, ofix.style.display = 'none' ) document.onmouseup = null }) } // 點選最大化按鈕 function maximizeClicked(e) { let o = e.target if(o.classList.contains('maximized')) { restore() }else { full() } } //... </script>
svelte-layer還支援型別為 message | notify | popover 彈窗。
svLayer.message({})
svLayer.notify({})
svLayer.popover({})
呼叫方式如上，只支援函式式呼叫。
svelte-layer支援自定義拖拽區域 drag: '#header' ，是否拖拽到視窗外 dragOut: true 。還支援iframe彈窗型別 type: 'iframe' ，配置 topmost: true 即可讓當前活動視窗保持置頂狀態。
該元件還有一大亮點，就是支援動態引入外部元件。
import Counter from '$lib/Counter.svelte' // 動態載入元件(函式式呼叫) function showComponentLayer() { svLayer({ type: 'component', title: '動態載入元件', content: Counter, resize: true, xclose: true, maximize: true, area: ['360px', '250px'] }) } <!-- 元件呼叫 --> <Layer bind:open={showComponent} content="這裡是內容資訊" resize drag=".vlayer__wrap-cnt" btns={[ {text: '確認', style: 'color:#f60;', click: () => showComponent=false}, ]} on:open={handleOpen} on:close={handleClose} > <svelte:fragment slot="content"> <Counter /> </svelte:fragment> </Layer>
OK，基於Svelte.js開發pc端彈窗元件就分享到這裡。希望對大家有一些幫助~ ?
最後附上一個svelte3+svelteKit聊天例項專案
svelte3.x+sass仿微信app聊天：https://www.cnblogs.com/xiaoyan2017/p/16110203.html
