一：安装依赖

npm config set registry https://registry.npmjs.org //设置npm镜像源
npm config set registry https://registry.npmmirror.com //设置淘宝镜像源

npm i vue-pdf-embed -S
npm install --save pdfjs-dist // npm下载缓慢，请用cnpm或者淘宝镜像源

二：引入插件

import VuePdfEmbed from 'vue-pdf-embed';
import * as pdfjsLib from 'pdfjs-dist'; //pdfjs-dist版本一npm更新会出错,public下需要同步更新

将node_modules目录下 pdfjs-dist/build/pdf.worker.js及pdf.worker.js.map 复制一份放到项目 public 目录下后引入

三：代码实现

<div class="page-tool">
  <div class="page-tool-item" @click="lastPage">上一页</div>
  <div class="page-tool-item" @click="nextPage">下一页</div>
  <div class="page-tool-item">{{ pageNum }}/{{ numPages }}</div>
  <div class="page-tool-item" @click="pageZoomOut">放大</div>
  <div class="page-tool-item" @click="pageZoomIn">缩小</div>
</div>
<vue-pdf-embed :source="source" :style="scaleStyle" :page="pageNum" />

const scaleStyle = computed(() => {
  if (state.scale > 1) {
    return `transform-origin: 0 0;transform:scale(${state.scale})`;
  } else {
    return `transform-origin: 50% 0;transform:scale(${state.scale})`;
  }
});

const state = reactive({
  source: '',
  pageNum: 1,
  numPages: 0,
  scale: 1 // 缩放比例
});

const { source, pageNum, numPages, iconPic } = toRefs(state);

function getPdfUrl(data: string) {
  state.source = data;
  pdfjsLib.GlobalWorkerOptions.workerSrc = '/pdfjs-dist/pdf.worker.js'; //public目录下引用路径
  const loadingTask = pdfjsLib.getDocument(data);
  loadingTask.promise.then(pdf => {
    state.numPages = pdf.numPages;
  });
}
// 上一页
function lastPage() {
  if (state.pageNum > 1) {
    state.pageNum -= 1;
  }
}
// 下一页
function nextPage() {
  if (state.pageNum < state.numPages) {
    state.pageNum += 1;
  }
}
// 放大
function pageZoomOut() {
  if (state.scale < 2) {
    state.scale += 0.1;
  }
}
// 缩小
function pageZoomIn() {
  if (state.scale > 0.9) {
    state.scale -= 0.1;
  }
}

.page-tool {
  display: flex;
  position: absolute;
  top: 10px;
  left: 50%;
  z-index: 100;
  transform: translateX(-50%);
  align-items: center;
  background: rgb(66 66 66);
  color: white;
  border-radius: 19px;
  cursor: pointer;
  justify-content: center;
  font-size: 15px;
  .page-tool-item {
    padding: 4px 10px;
    cursor: pointer;
  }
}