Error: Class private methods are not enabled when using pdfjs-dist library

[prabh-62]

Command

build, serve, test

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

Angular v15 CLI is not able to build and serve app if pdfjs-dist library is imported

Minimal Reproduction

• npx @angular/cli@15 new admin-console
• cd admin-console
• npm install pdfjs-dist
• npm ls pdfjs-dist -> 3.1.81
• Edit src/app/app.component.ts and update the file with this code

import { Component } from '@angular/core';
import * as pdfjsLib from 'pdfjs-dist';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  title = 'admin-console';

  private initialize() {
    console.log(pdfjsLib.version);
  }
}

• npm run build

Exception or Error

./node_modules/pdfjs-dist/build/pdf.js - Error: Module build failed (from ./node_modules/@angular-devkit/build-angular/src/babel/webpack-loader.js):
SyntaxError: /Users/prabh/dev/tmp/admin-console/node_modules/pdfjs-dist/build/pdf.js: Class private methods are not enabled. Please add `@babel/plugin-proposal-private-methods` to your configuration.
  2591 | class PDFObjects {
  2592 |   #objs = Object.create(null);
> 2593 |   #ensureObj(objId) {

Your Environment

Angular CLI: 15.0.3
Node: 18.12.1
Package Manager: npm 8.19.3
OS: darwin arm64

Angular: 15.0.3
... animations, cli, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1500.3
@angular-devkit/build-angular   15.0.3
@angular-devkit/core            15.0.3
@angular-devkit/schematics      15.0.3
@schematics/angular             15.0.3
rxjs                            7.5.7
typescript                      4.8.4

Anything else relevant?

No response

[alan-agius4]

Duplicate of #24426

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