import * as pdfjsLib from 'pdfjs-dist/webpack'; needs .mjs

[tamuratak]

Attach (recommended) or Link to PDF file here:

Configuration:

• Web browser and its version: Firefox 120.0
• Operating system and its version: macOS 13.6.1 22G313
• PDF.js version: 5781e72 at the main branch
• Is a browser extension: No

Steps to reproduce the problem:

1. At examples/webpack
2. Edit configs following the recommendation in README.md
3. Run npm run build
4. webpack throws an error.
5. If I rewrite "pdfjs-dist/webpack" to "pdfjs-dist/webpack.mjs", no error occurs.

import * as pdfjsLib from "pdfjs-dist/webpack"; in README.md should be import * as pdfjsLib from "pdfjs-dist/webpack.mjs";

diff --git a/examples/webpack/main.mjs b/examples/webpack/main.mjs
index 9f9d7138b..2496885ac 100644
--- a/examples/webpack/main.mjs
+++ b/examples/webpack/main.mjs
@@ -3,14 +3,10 @@
 
 // Hello world example for webpack.
 
-import * as pdfjsLib from "pdfjs-dist";
+import * as pdfjsLib from "pdfjs-dist/webpack";
 
 const pdfPath = "../learning/helloworld.pdf";
 
-// Setting worker path to worker bundle.
-pdfjsLib.GlobalWorkerOptions.workerSrc =
-  "../../build/webpack/pdf.worker.bundle.js";
-
 // Loading a document.
 const loadingTask = pdfjsLib.getDocument(pdfPath);
 const pdfDocument = await loadingTask.promise;
diff --git a/examples/webpack/webpack.config.js b/examples/webpack/webpack.config.js
index 47301843c..b5c049340 100644
--- a/examples/webpack/webpack.config.js
+++ b/examples/webpack/webpack.config.js
@@ -6,8 +6,7 @@ const path = require("path");
 module.exports = {
   context: __dirname,
   entry: {
-    main: "./main.mjs",
-    "pdf.worker": "pdfjs-dist/build/pdf.worker.mjs",
+    main: "./main.mjs"
   },
   mode: "none",
   output: {

$  npm run build 

> webpack-pdf.js-example@0.2.0 build
> webpack

asset main.bundle.js 6.02 KiB [emitted] (name: main)
runtime modules 2.32 KiB 2 modules
./main.mjs 794 bytes [built] [code generated]

ERROR in ./main.mjs 6:0-47
Module not found: Error: Can't resolve 'pdfjs-dist/webpack' in '/Users/tamura/src/github/pdf.js/examples/webpack'
resolve 'pdfjs-dist/webpack' in '/Users/tamura/src/github/pdf.js/examples/webpack'
  Parsed request is a module
  using description file: /Users/tamura/src/github/pdf.js/examples/webpack/package.json (relative path: .)
    Field 'browser' doesn't contain a valid alias configuration
    resolve as module
      looking for modules in /Users/tamura/src/github/pdf.js/examples/webpack/node_modules
        existing directory /Users/tamura/src/github/pdf.js/examples/webpack/node_modules/pdfjs-dist
          using description file: /Users/tamura/src/github/pdf.js/examples/webpack/node_modules/pdfjs-dist/package.json (relative path: .)
            using description file: /Users/tamura/src/github/pdf.js/examples/webpack/node_modules/pdfjs-dist/package.json (relative path: ./webpack)
              /Users/tamura/src/github/pdf.js/examples/webpack/node_modules/pdfjs-dist/webpack doesn't exist
      /Users/tamura/src/github/pdf.js/examples/node_modules doesn't exist or is not a directory
      looking for modules in /Users/tamura/src/github/pdf.js/node_modules
        existing directory /Users/tamura/src/github/pdf.js/node_modules/pdfjs-dist
          using description file: /Users/tamura/src/github/pdf.js/node_modules/pdfjs-dist/package.json (relative path: .)
            using description file: /Users/tamura/src/github/pdf.js/node_modules/pdfjs-dist/package.json (relative path: ./webpack)
              /Users/tamura/src/github/pdf.js/node_modules/pdfjs-dist/webpack doesn't exist
      /Users/tamura/src/github/node_modules doesn't exist or is not a directory
      /Users/tamura/src/node_modules doesn't exist or is not a directory
      /Users/tamura/node_modules doesn't exist or is not a directory
      /Users/node_modules doesn't exist or is not a directory
      /node_modules doesn't exist or is not a directory

webpack 5.89.0 compiled with 1 error in 46 ms

$  npx webpack -v      

  System:
    OS: macOS 13.6.1
    CPU: (8) arm64 Apple M1
    Memory: 196.09 MB / 16.00 GB
  Binaries:
    Node: 18.18.2 - /opt/local/bin/node
    Yarn: 1.22.19 - ~/bin/yarn
    npm: 6.14.18 - ~/src/github/pdf.js/node_modules/.bin/npm
  Browsers:
    Chrome: 119.0.6045.159
    Safari: 17.1
  Packages:
    webpack: ^5.89.0 => 5.89.0 
    webpack-cli: ^5.1.4 => 5.1.4