Vue实现docx、pdf格式文件在线预览功能

npm i docx-preview

<div ref="file" v-show="extend == 'docx'"></div>

import { renderAsync } from "docx-preview";
renderDocx() {
      renderAsync(this.fileData, this.$refs.file, null, {
        className: "docx", //默认和文档样式类的类名/前缀
        inWrapper: true, //启用围绕文档内容呈现包装器
        ignoreWidth: false, //禁用页面的渲染宽度
        ignoreHeight: false, //禁用页面的渲染高度
        ignoreFonts: false, //禁用字体渲染
        breakPages: true, //在分页符上启用分页
        ignoreLastRenderedPageBreak: true, //在lastRenderedPageBreak元素上禁用分页
        experimental: false, //启用实验功能（制表符停止计算）
        trimXmlDeclaration: true, //如果为true，则在解析之前将从xml文档中删除xml声明
        useBase64URL: false, //如果为true，图像、字体等将转换为base 64 URL，否则使用URL.createObjectURL
        useMathMLPolyfill: false, //包括用于铬、边等的MathML多填充。
        showChanges: false, //启用文档更改的实验渲染（插入/删除）
        debug: false, //启用额外的日志记录
      });
    },

npm i pdfjs-dist

<canvas
  v-for="num in numPages"
  :key="num"
  :id="'canvas_' + num"
  class="canvas"
></canvas>

async renderPdf(num = 1) {
      this.fileData.getPage(num).then(page => {
        // 设置canvas相关的属性
        const canvas = document.getElementById("canvas_" + num);
        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: this.pdfScale }); // 设置放缩比率
        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);
        if (this.numPages > num) {
          setTimeout(() => {
            return this.renderPdf(num + 1);
          });
        }
      });
    },

// pdf放大
setPdfZoomin() {
  const max = 2;
  if (this.pdfScale >= max) {
    return;
  }
  this.pdfScale = this.pdfScale + 0.2;
  this.renderPdf();
},
// pdf缩小
setPdfZoomout() {
  const min = 0.6;
  if (this.pdfScale <= min) {
    return;
  }
  this.pdfScale = this.pdfScale - 0.1;
  this.renderPdf();
},

renderPreview(extend) {
    const handle = {
    docx: () => {
      this.extend = "docx";
      this.$nextTick(() => this.renderDocx());
    },
    pdf: () => {
      this.extend = "pdf";
      new Blob([this.fileData]).arrayBuffer().then(res => {
        PDFJS.getDocument(res).promise.then(pdfDoc => {
          this.numPages = pdfDoc.numPages; // pdf的总页数
          this.fileData = pdfDoc;
          this.$nextTick(() => this.renderPdf());
        });
      });
    },
    };
    this.isLoading = false;
    if (!Object.hasOwn(handle, extend)) {
    this.extendName = extend;
    return (this.extend = "other");
    }
    handle[extend]();
},

<div class="container" v-show="extend == 'other'">
  <a-alert
    :message="`不支持.${this.extendName}格式的在线预览，请下载后预览或转换为支持的格式`"
    description="支持docx, pdf格式的在线预览"
    type="info"
    show-icon
  />
</div>