IE11 not able to load PDFJS worker

Before you start - checklist

• I followed instructions in documentation written for my React-PDF version
• I have checked if this bug is not already reported
• I have checked if an issue is not listed in Known issues
• If I have a problem with PDF rendering, I checked if my PDF renders properly in Mozilla Firefox

Description

IE11 does not render PDFs with 5.0.0-beta.3 or latest version 4.1

Steps to reproduce

Steps to reproduce the behavior:

1. Use IE11
2. Load any PDF using a URL (or local file)
3. See the following error

Also noting that with this library I have to add a worker SRC otherwise the PDF will not load.

import { Document, Page, pdfjs } from 'react-pdf'
...
pdfjs.GlobalWorkerOptions.workerSrc = `//cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjs.version}/pdf.worker.js`

Expected behavior

IE11 should load PDF js documents. Also noting that @mikecousins/react-pdf will load. So perhaps there is a method or configuration to support IE11 that is missing.

Additional information

Environment

• Browser (if applicable) [e.g. Chrome 57, Firefox 59]: IE11 (chrome & firefox have no issue)
• React-PDF version [e.g. 3.0.4]: 4.1 and also tested on 5.0.0-beta.3
• React version [e.g. 16.3.0]: 16.13.0
• Webpack version (if applicable) [e.g. 4.16.2]: 4.42.0

[wojtekmaj]

Unfortunately, in v5, support for IE 11 has been dropped. There’s nothing we can do about it. Sorry about that!

If you still need to continue support IE 11, you’re stuck at v4.x.

See thread: https://github.com/wojtekmaj/react-pdf/issues/495#issuecomment-662036968

[david-pulse]

Facing issues with IE11 as well… I do think it needs to be a babel configuration problem… It appears that my webpack configuration is not compiling the react-pdf import of pdfjs-dist to es5.

When I look at the compiled code, it is still using es6 code which is why it’s failing on IE11. It would be great if we could get an IE11 compatible config.