I’ve forked pdfjs-dist and made a branch with updated version with hope to make it work in IE11 and P3: https://github.com/platosha/pdfjs-dist/tree/chore/2.1.266

Unfortunately, even after the update, it does not work in IE11 with Polymer 3. I have this error:

SCRIPT28 Out of stack space

Similar symptoms as in here: webcomponents/webcomponentsjs#972

Basically, both the @webcomponents/webcomponentsjs v2 polyfill, and the PDF.js build include different Symbol polyfills, which are incompatible between each other. An error is thrown as soon as the PDF.js main bundle or the worker script is loaded after the webcomponentjs polyfills.

With P2, however, it works, because @webcomponents/webcomponentsjs v1 doesn’t include a Symbol polyfill.

Potential ways to tackle this are, and none of them are easy:

• Make PDF.js not depend on core-js Symbol polyfill, requires changes in PDF.js
• Make webcomponentsjs use core-js Symbol, requires changes in webcomponentsjs
• Include the core-js polyfills before webcomponentsjs, requires multiple changes in, basically, every our repo.

The next thing to try here would be making a custom PDF.js build and bundling it with the component.

All committers have signed the CLA.