如何在Vue项目中导入Mozilla PDF.js？

Question

The question is simple. How do I correctly import the PDF.js library into a Vuejs project?

The library is undefined when I log it.

See my problem in a codesandbox live here .

This is how I am trying it now:

<script>
import pdfjsLib from "pdfjs-dist/build/pdf";
// import { PDFViewer } from "pdfjs-dist/web/pdf_viewer";
import "pdfjs-dist/web/pdf_viewer.css";

pdfjsLib.GlobalWorkerOptions.workerSrc =
  "https://cdn.jsdelivr.net/npm/pdfjs-dist@2.0.943/build/pdf.worker.min.js";

export default {
  name: "PdfViewer",
  mounted() {
    pdfjsLib.getDocument("./sample.pdf").then((doc) => {
      console.log("doc: ", doc);
    });
  },
  methods: {},
};
</script>

But that gives me the following error: Cannot read property 'GlobalWorkerOptions' of undefined

Answer 1

I think the error occurs if pdfjsLib does not fall into the global scope, see also codesandbox :

<template>
  <div id="pageContainer">
    <div id="viewer" class="pdfViewer"></div>
  </div>
</template>

<script>
import pdfjsLib from "pdfjs-dist/build/pdf";
import { PDFViewer } from "pdfjs-dist/web/pdf_viewer";
import "pdfjs-dist/web/pdf_viewer.css";

pdfjsLib.GlobalWorkerOptions.workerSrc =
  "https://cdn.jsdelivr.net/npm/pdfjs-dist@2.0.943/build/pdf.worker.min.js";

export default {
  name: "PdfViewer",
  props: { docPath: String },
  mounted() {
    this.getPdf();
  },
  methods: {
    async getPdf() {
      let container = document.getElementById("pageContainer");
      let pdfViewer = new PDFViewer({
        container: container,
      });
      let pdf = await pdfjsLib.getDocument(this.docPath);
      pdfViewer.setDocument(pdf);
    },
  },
};
</script>

<style>
#pageContainer {
  margin: auto;
  width: 80%;
}

div.page {
  display: inline-block;
}
</style>

use it:

<PdfViewer docPath="./sample.pdf" />

Answer 2

Pdf.js provide a solution for us. Webpack.js included in the project.

const pdfjsLib = require("pdfjs-dist/webpack");

If you get an error like below:

./node_modules/pdfjs-dist/build/pdf.min.js 22:36927
Module parse failed: Unexpected token (22:36927)

Then we have to use es5/build/pdf.js , so we can create src/pdfjs-webpack.js :

"use strict";

var pdfjs = require("pdfjs-dist/");
var PdfjsWorker = require("worker-loader?esModule=false&filename=[name].js!pdfjs-dist/");

if (typeof window !== "undefined" && "Worker" in window) {
  pdfjs.GlobalWorkerOptions.workerPort = new PdfjsWorker();
}

module.exports = pdfjs;

then:

Answer 3

In case anyone else needs it, the soution is really simple. You just have to import it like this:

import * as pdfjsLib from "pdfjs-dist/build/pdf";

Answer 4

vue-cli5 already use webpack5 , and webpack5 has a built-in web worker and is very easy to use.

Create a file: pdfjs-webpack5.js

import * as pdfjsLib from 'pdfjs-dist'

pdfjsLib.GlobalWorkerOptions.workerPort = new Worker(new URL('pdfjs-dist/build/pdf.worker.js', import.meta.url))

export default pdfjsLib

According to the example getinfo.js given in Setup PDF.js in a website , you can easily read the contents of PDF files.

I use the version of the package.

pdfjs-dist: 2.15.349
webpack: 5.74.0
@vue/cli*: 5.0.8

Answer 5

@NKSM

use: var pdfjs = require('pdfjs-dist/es5/build/pdf.min.js');

but error

* pdfjs-dist/es5/build/pdf.min.js in ./node_modules/cache-loader/dist/cjs.js??ref--12-0!./node_modules/babel-loader/lib!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/pages/utils/preview/Index.vue?vue&type=script&lang=js&