纯前端使用插件pdfjs实现将pdf转为图片的步骤

npm install pdfjs-dist --save

<template>
  <div ref="showpdfRef"></div>
</template>

<script setup>
import { ref } from 'vue';
import { getDocument } from 'pdfjs-dist/legacy/build/pdf.mjs';
import 'pdfjs-dist/build/pdf.worker.mjs';

const showpdfRef = ref(null);

const pdfPath ='xxxxxxxx'

const loadingTask = getDocument(pdfPath);
loadingTask.promise
  .then(async (pdf) => {
    const canvas = document.createElement('canvas');
    const context = canvas.getContext('2d');
    // 循环遍历每一页pdf，将其转成图片
    for (let i = 1; i <= pdf._pdfInfo.numPages; i++) {
      // 获取pdf页
      const page = await pdf.getPage(i);
      // 获取页的尺寸
      const viewport = page.getViewport({ scale: 1 });
      // 设置canvas的尺寸
      canvas.width = viewport.width;
      canvas.height = viewport.height;
      // 将pdf页渲染到canvas上
      await page.render({ canvasContext: context, viewport: viewport }).promise;
      // 将canvas转成图片，并添加到页面上
      const img = document.createElement('img');
      img.src = canvas.toDataURL('image/png');
      showpdfRef.value.appendChild(img);
    }
   
  })
  .then(
    function () {
      console.log('# End of Document');
    },
    function (err) {
      console.error('Error: ' + err);
    },
  );
</script>

<style scoped></style>