前端实现 word、excel、pdf、ppt、mp4、图片、文本等文件的预览

import { defaultOptions, renderAsync } from "docx-preview";renderAsync(buffer, document.getElementById("container"), null,options: {       className: string = "docx", // 默认和文档样式类的类名/前缀       inWrapper: boolean = true, // 启用围绕文档内容渲染包装器       ignoreWidth: boolean = false, // 禁止页面渲染宽度       ignoreHeight: boolean = false, // 禁止页面渲染高度       ignoreFonts: boolean = false, // 禁止字体渲染       breakPages: boolean = true, // 在分页符上启用分页       ignoreLastRenderedPageBreak: boolean = true,//禁用lastRenderedPageBreak元素的分页       experimental: boolean = false, //启用实验性功能（制表符停止计算）       trimXmlDeclaration: boolean = true, //如果为真，xml声明将在解析之前从xml文档中删除       debug: boolean = false, // 启用额外的日志记录   });
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import * as PDFJS from "pdfjs-dist/legacy/build/pdf";// 设置pdf.worker.js文件的引入地址PDFJS.GlobalWorkerOptions.workerSrc = require("pdfjs-dist/legacy/build/pdf.worker.entry.js");// data是一个ArrayBuffer格式，也是一个buffer流的数据PDFJS.getDocument(data).promise.then(pdfDoc=>{    const numPages = pdfDoc.numPages; // pdf的总页数    // 获取第1页的数据    pdfDoc.getPage(1).then(page =>{     // 设置canvas相关的属性     const canvas = document.getElementById("the_canvas");     const ctx = canvas.getContext("2d");     const dpr = window.devicePixelRatio || 1;     const bsr =       ctx.webkitBackingStorePixelRatio ||       ctx.mozBackingStorePixelRatio ||       ctx.msBackingStorePixelRatio ||       ctx.oBackingStorePixelRatio ||       ctx.backingStorePixelRatio ||       1;     const ratio = dpr / bsr;     const viewport = page.getViewport({ scale: 1 });     canvas.width = viewport.width * ratio;     canvas.height = viewport.height * ratio;     canvas.style.width = viewport.width + "px";     canvas.style.height = viewport.height + "px";     ctx.setTransform(ratio, 0, 0, ratio, 0, 0);     const renderContext = {       canvasContext: ctx,       viewport: viewport,     };     // 数据渲染到canvas画布上     page.render(renderContext);    })})
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// 加载excel的数据（new ExcelJS.Workbook().xlsx.load(buffer)).then(workbook=>{   // 获取excel的第一页的数据   const ws = workbook.getWorksheet(1);   // 获取每一行的数据   const data = ws.getRows(1, ws.actualRowCount); })  // 渲染页面import { HotTable } from "@handsontable/vue";<hot-table  :settings="hotSettings"></hot-table>hotSettings = {   language: "zh-CN",   readOnly: true,   data: this.data,   cell: this.cell,   mergeCells: this.merge,   colHeaders: true,   rowHeaders: true,   height: "calc(100vh - 107px)",   // contextMenu: true,   // manualRowMove: true,   // 关闭外部点击取消选中时间的行为   outsideClickDeselects: false,   // fillHandle: {   //   direction: 'vertical',   //   autoInsertRow: true   // },   // afterSelectionEnd: this.afterSelectionEnd,   // bindRowsWithHeaders: 'strict',   licenseKey: "non-commercial-and-evaluation"}复制代码