js(window.open)浏览器弹框居中显示

本文提供了一个使用JavaScript实现网页弹窗功能的示例代码。通过设置弹窗的位置、尺寸等属性,可以轻松地在页面中添加自定义大小和位置的弹窗。此方法适用于需要快速部署简单弹窗通知的应用场景。
    <span style="background-color: rgb(204, 204, 204);"><html>   
    <meta name="name" content="content" charset="utf-8">  
    <head>   
    <script LANGUAGE="javascript">   
          
      
    function openwin(){  
        var openUrl = "http://www.baidu.com";//弹出窗口的url  
        var iWidth=400; //弹出窗口的宽度;  
        var iHeight=100; //弹出窗口的高度;  
        var iTop = (window.screen.availHeight-30-iHeight)/2; //获得窗口的垂直位置;  
        var iLeft = (window.screen.availWidth-10-iWidth)/2; //获得窗口的水平位置;  
        window.open(openUrl,"","height="+iHeight+", width="+iWidth+", top="+iTop+", left="+iLeft);   
    }  
    </script>   
    </head>   
    <body >   
    <a href="javaxript:" onclick="openwin()">点击</a>  
    </body>   
    </html></span>  

 

 

window.open('OperationDetail.aspx?id=' + id, "", "height=" + 400 + ", width=" + 600 + ", top=" + (window.screen.availHeight - 30 - 400) / 2 + ", left=" + (window.screen.availWidth - 10 - 600) / 2);

 

转载于:https://www.cnblogs.com/yangwujun/p/7773290.html

<template> <Teleport to="body"> <div v-if="visible" class="pdf-mask" @mousedown="startDrag"> <div ref="modalRef" class="pdf-modal" :style="modalStyle"> <!-- PDF 头部:标题 + 操作按钮 --> <div class="pdf-header"> <span class="title">报关资料</span> <div class="tools"> <el-button size="small" @click="zoomIn">放大</el-button> <el-button size="small" @click="zoomOut">缩小</el-button> <el-button size="small" @click="close">关闭</el-button> </div> </div> <!-- PDF 标签页 + 内容区域 --> <el-tabs v-model="activeTab" class="pdf-tabs" @tab-click="handleTabClick"> <el-tab-pane v-for="tab in tabs" :key="tab.id" :label="tab.name" :name="tab.id.toString()"> <div class="pdf-body" :ref="(el) => el && scrollRefMap.set(tab.id, el as HTMLDivElement)" @wheel="(e) => onWheel(e, tab.id)" @mousedown="(e) => onPdfMouseDown(e, tab.id)"> <div :ref="(el) => el && setPdfContainer(tab.id, el as HTMLDivElement)" /> </div> </el-tab-pane> </el-tabs> </div> </div> </Teleport> </template> <script setup lang="ts"> import { ref, reactive, watch, nextTick, onUnmounted } from 'vue' import type { CSSProperties } from 'vue' import * as pdfjsLib from 'pdfjs-dist' import pdfjsWorker from 'pdfjs-dist/build/pdf.worker?worker&url' import type { PDFDocumentLoadingTask, PDFDocumentProxy, PDFPageProxy, RenderParameters } from 'pdfjs-dist/types/src/display/api' import type { PageViewport } from 'pdfjs-dist' import { ElButton, ElTabs, ElTabPane } from 'element-plus' import type { TabsPaneContext } from 'element-plus' // PDF.js 初始化 pdfjsLib.GlobalWorkerOptions.workerSrc = pdfjsWorker /* ---------------- Props & Emits ---------------- */ const props = defineProps<{ visible: boolean url?: string highlight?: { x0: number; y0: number; x1: number; y1: number } | null }>() const emit = defineEmits<{ (e: 'update:visible', value: boolean): void (e: 'tabschange', tabId: string | number): void }>() /* ---------------- 状态 ---------------- */ const tabs = ref<Array<{ id: string | number; name: string; url: string }>>([]) const activeTab = ref<string>('') const pdfContainerMap = new Map<string | number, HTMLDivElement>() const scrollRefMap = new Map<string | number, HTMLDivElement>() const tabScale = new Map<string | number, number>() const tabBaseViewport = new Map<string | number, PageViewport>() const modalRef = ref<HTMLDivElement | null>(null) let abortController: AbortController | null = null let currentScrollContainer: HTMLDivElement | null = null /* ---------------- 窗位置 ---------------- */ const modalStyle = reactive<{ left: string top: string width: string height: string cursor: CSSProperties['cursor'] }>({ left: '0px', top: '0px', width: '800px', height: '600px', cursor: 'default' }) let dragStart: { x: number; y: number } | null = null /* ---------------- 标签页初始化 ---------------- */ async function openWithTabs( list: Array<{ code: string; name: string; url: string }> ) { tabs.value = [] pdfContainerMap.clear() scrollRefMap.clear() tabScale.clear() tabBaseViewport.clear() clearHighlight(); if (abortController) { abortController.abort() abortController = null } tabs.value = list .filter(item => item.name !== 'all_files') .map(item => ({ id: item.code, name: item.name, url: item.url })) const firstTabId = tabs.value[0]?.id.toString() ?? '' activeTab.value = firstTabId emit('update:visible', true) await nextTick() const firstTab = tabs.value[0] if (firstTab) { const container = pdfContainerMap.get(firstTab.id) if (container) await renderSinglePDF(firstTab.url, container, firstTab.id) } // 居中 const { innerWidth, innerHeight } = window modalStyle.left = `${(innerWidth - 800) / 2}px` modalStyle.top = `${(innerHeight - 600) / 2}px` } function setPdfContainer(tabId: string | number, el: HTMLDivElement) { pdfContainerMap.set(tabId, el) } /* ---------------- PDF 渲染 ---------------- */ async function renderSinglePDF( pdfUrl: string, container: HTMLDivElement, currentTabId: string | number ) { container.querySelectorAll('.pdf-highlight').forEach(el => el.remove()) if (activeTab.value !== currentTabId.toString()) return if (!(container instanceof HTMLDivElement)) return container.querySelectorAll('.pdf-highlight').forEach(el => el.remove()) if (abortController) { abortController.abort() } abortController = new AbortController() container.innerHTML = '' const scrollContainer = scrollRefMap.get(currentTabId) if (!scrollContainer) return try { const pdfLoadingTask: PDFDocumentLoadingTask = pdfjsLib.getDocument({ url: pdfUrl, signal: abortController.signal } as any) as PDFDocumentLoadingTask const pdfDoc: PDFDocumentProxy = await pdfLoadingTask.promise const pdfPage: PDFPageProxy = await pdfDoc.getPage(1) if (activeTab.value !== currentTabId.toString()) return const baseViewport = pdfPage.getViewport({ scale: 1 }) tabBaseViewport.set(currentTabId, baseViewport) const currentScale = tabScale.get(currentTabId) ?? 1 const renderScale = currentScale * (800 / baseViewport.width) const renderViewport = pdfPage.getViewport({ scale: renderScale }) const canvas = document.createElement('canvas') const ctx = canvas.getContext('2d') if (!ctx) { container.innerHTML = '<div class="pdf-error">Canvas 初始化失败</div>' return } canvas.width = renderViewport.width canvas.height = renderViewport.height canvas.dataset.scale = String(currentScale) container.appendChild(canvas) const renderParams: RenderParameters = { canvasContext: ctx, viewport: renderViewport, signal: abortController } as any await pdfPage.render(renderParams).promise if (activeTab.value !== currentTabId.toString()) { container.innerHTML = '' return } // 关键修改:不再给滚动容器写死宽高 // scrollContainer.style.width = `${renderViewport.width}px` // scrollContainer.style.height = `${renderViewport.height}px` if (props.highlight) drawHighlight(props.highlight, currentTabId) } catch (error) { if ((error as Error).name !== 'AbortError') { console.error('PDF 加载失败:', error) container.innerHTML = '<div class="pdf-error">PDF 加载失败,请重试</div>' } } } /* ---------------- 标签页切换 & 缩放 ---------------- */ function handleTabClick(tab: TabsPaneContext) { clearHighlight(); emit('tabschange', tab.paneName) } watch(activeTab, (newTabIdStr) => { clearHighlight(); const tab = tabs.value.find(t => t.id.toString() === newTabIdStr) if (!tab) return const container = pdfContainerMap.get(tab.id) if (container) renderSinglePDF(tab.url, container, tab.id) }) const zoomIn = () => { const id = tabs.value.find(t => t.id.toString() === activeTab.value)?.id if (!id) return tabScale.set(id, Math.min((tabScale.get(id) ?? 1) + 0.2, 3)) rerenderActiveTab() } const zoomOut = () => { const id = tabs.value.find(t => t.id.toString() === activeTab.value)?.id if (!id) return tabScale.set(id, Math.max((tabScale.get(id) ?? 1) - 0.2, 0.5)) rerenderActiveTab() } async function rerenderActiveTab() { const tab = tabs.value.find(t => t.id.toString() === activeTab.value) if (!tab) return const container = pdfContainerMap.get(tab.id) if (container) await renderSinglePDF(tab.url, container, tab.id) } /* ---------------- 窗拖拽 ---------------- */ function startDrag(e: MouseEvent) { const target = e.target as HTMLElement if (!target.classList.contains('pdf-mask') && !target.closest('.pdf-header')) return if (!modalRef.value) return dragStart = { x: e.clientX, y: e.clientY } modalStyle.cursor = 'grabbing' document.addEventListener('mousemove', onDrag) document.addEventListener('mouseup', stopDrag) e.preventDefault() } function onDrag(e: MouseEvent) { if (!dragStart) return const dx = e.clientX - dragStart.x const dy = e.clientY - dragStart.y modalStyle.left = `${parseFloat(modalStyle.left) + dx}px` modalStyle.top = `${parseFloat(modalStyle.top) + dy}px` dragStart = { x: e.clientX, y: e.clientY } } function stopDrag() { dragStart = null modalStyle.cursor = 'default' document.removeEventListener('mousemove', onDrag) document.removeEventListener('mouseup', stopDrag) } /* ---------------- PDF 内容拖拽 ---------------- */ let isPdfDragging = false let pdfDragStart = { x: 0, y: 0 } let scrollStart = { left: 0, top: 0 } function onPdfMouseDown(e: MouseEvent, tabId: string | number) { const sc = scrollRefMap.get(tabId) if (!sc) return const scale = tabScale.get(tabId) ?? 1 if (scale <= 1) return isPdfDragging = true pdfDragStart = { x: e.clientX, y: e.clientY } scrollStart = { left: sc.scrollLeft, top: sc.scrollTop } currentScrollContainer = sc document.addEventListener('mousemove', onPdfMouseMove) document.addEventListener('mouseup', onPdfMouseUp) e.preventDefault() } function onPdfMouseMove(e: MouseEvent) { if (!isPdfDragging || !currentScrollContainer) return const dx = e.clientX - pdfDragStart.x const dy = e.clientY - pdfDragStart.y currentScrollContainer.scrollTo({ left: scrollStart.left - dx, top: scrollStart.top - dy, behavior: 'auto' }) } function onPdfMouseUp() { isPdfDragging = false currentScrollContainer = null document.removeEventListener('mousemove', onPdfMouseMove) document.removeEventListener('mouseup', onPdfMouseUp) } /* ---------------- 滚轮事件 ---------------- */ function onWheel(e: WheelEvent, tabId: string | number) { e.stopPropagation() const sc = scrollRefMap.get(tabId) if (sc) { const scale = tabScale.get(tabId) ?? 1 sc.scrollLeft -= e.deltaX * scale sc.scrollTop -= e.deltaY * scale e.preventDefault() } } /* ---------------- 高亮区域绘制 ---------------- */ function drawHighlight( rect: { x0: number; y0: number; x1: number; y1: number }, tabId?: string | number ) { const id = tabId ?? tabs.value.find(t => t.id.toString() === activeTab.value)?.id if (!id) return const container = pdfContainerMap.get(id) const sc = scrollRefMap.get(id) if (!container || !sc) return container.querySelectorAll('.pdf-highlight').forEach(el => el.remove()) const canvas = container.querySelector('canvas') const baseViewport = tabBaseViewport.get(id) if (!canvas || !baseViewport) return const scale = parseFloat(canvas.dataset.scale || '1') const scaleX = canvas.width / baseViewport.width const scaleY = canvas.height / baseViewport.height const highlightEl = document.createElement('div') highlightEl.className = 'pdf-highlight' Object.assign(highlightEl.style, { position: 'absolute', left: `${rect.x0 * scaleX}px`, top: `${rect.y0 * scaleY}px`, width: `${(rect.x1 - rect.x0) * scaleX}px`, height: `${(rect.y1 - rect.y0) * scaleY}px`, background: 'rgba(0, 255, 0, 0.4)', border: '2px dashed #ff4d4f', pointerEvents: 'none', zIndex: 9999 }) container.style.position = 'relative' container.appendChild(highlightEl) nextTick(() => { const cw = sc.clientWidth const ch = sc.clientHeight sc.scrollTo({ left: Math.max(0, parseFloat(highlightEl.style.left) - cw / 3), top: Math.max(0, parseFloat(highlightEl.style.top) - ch / 3), behavior: 'smooth' }) }) } function drawHighlightByCoords(rect: { x0: number; y0: number; x1: number; y1: number }) { drawHighlight(rect) } // 清空所有高亮元素 function clearHighlight() { // 直接查询 .pdf-mask 下所有高亮元素,确保覆盖所有 Tab 和容器 const allHighlights = document.querySelectorAll('.pdf-mask .pdf-highlight'); allHighlights.forEach(el => el.remove()); } /* ---------------- 监听 Props ---------------- */ watch( () => props.visible, async (v) => { if (!v) { tabScale.clear() if (abortController) { abortController.abort() abortController = null } currentScrollContainer = null clearHighlight(); return } clearHighlight(); await nextTick() const { innerWidth, innerHeight } = window modalStyle.left = `${(innerWidth - 800) / 2}px` modalStyle.top = `${(innerHeight - 600) / 2}px` }, { immediate: true } ) watch( () => props.highlight, (hl) => { if (hl) { drawHighlight(hl) } else { clearHighlight() // 关键:当 highlight 为 null 时清除高亮 } }, { immediate: false, deep: true } ) /* ---------------- 关闭 ---------------- */ function close() { if (abortController) { abortController.abort() abortController = null } currentScrollContainer = null clearHighlight(); emit('update:visible', false) } /* ---------------- 清理 ---------------- */ onUnmounted(() => { if (abortController) abortController.abort() document.removeEventListener('mousemove', onDrag) document.removeEventListener('mouseup', stopDrag) document.removeEventListener('mousemove', onPdfMouseMove) document.removeEventListener('mouseup', onPdfMouseUp) pdfContainerMap.clear() scrollRefMap.clear() tabScale.clear() tabBaseViewport.clear() currentScrollContainer = null }) /* ---------------- 暴露 ---------------- */ defineExpose({ openWithTabs, drawHighlight: drawHighlightByCoords }) </script> <style scoped> .pdf-mask { position: fixed; inset: 0; z-index: 9999; pointer-events: none; } .pdf-modal { position: absolute; background: #ffffff; border: 1px solid #e4e7ed; border-radius: 8px; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15); display: flex; flex-direction: column; pointer-events: auto; min-width: 400px; min-height: 300px; resize: both; overflow: hidden; } .pdf-header { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: #f5f7fa; cursor: grab; border-bottom: 1px solid #e4e7ed; user-select: none; } .pdf-header:active { cursor: grabbing; } .pdf-header .title { font-size: 16px; font-weight: 500; color: #1f2937; } .pdf-header .tools { display: flex; gap: 8px; } .pdf-tabs { flex: 1; display: flex; flex-direction: column; overflow: hidden; } .pdf-body { flex: 1; overflow: auto; position: relative; } .pdf-body canvas { pointer-events: none; display: block; } .pdf-highlight { box-sizing: border-box; } .pdf-tabs .el-tabs__content { flex: 1; overflow: hidden; padding: 0 !important; } .pdf-tabs .el-tab-pane { height: 100%; display: flex; flex-direction: column; } .pdf-error { padding: 20px; text-align: center; color: #f56c6c; } </style> 我期望这个组件打开的,能离开当前的浏览器
最新发布
08-29
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