PDFKIT Version 0.11.0, not working in IE11

[THISISSUBBU]

Hi, I upgraded our pdfkit version to 0.11.0 (Latest), It is working fine in All browsers except IE11.
In IE11 failing with thy syntax error class

I'm using the standalone version of pdfkit by following instruction in
https://github.com/foliojs/pdfkit/wiki/How-to-compile-standalone-PDFKit-for-use-in-the-browser

Moreover, In IE11 demo page also not working https://pdfkit.org/demo/browser.html
Is PDFKIT not support IE11? or let me know what i'm missing.

Using the pdfkit.standalone.js, and error is Syntax error
class PDFAbstractReference {
toString() {
throw new Error('Must be implemented by subclasses');
}
}

IE11 not supporting class.

[JeffDerk]

Same issue here :(

[rdebeasi]

This issue may be related to foliojs/dfa#2.

[blikblum]

Recent releases of pdfkit are not compatible with IE11 due to change in dependencies.

To support IE11, dev must use bundler like webpack. You can see an example of webpack config that enables IE11 support at pdfmake: https://github.com/bpampuch/pdfmake/blob/master/webpack.config.js