discussion on stackoverflow: https://stackoverflow.com/questions/27957766/how-do-i-render...

There are online viewers from MS and Google. They are only good though if you have no Electron offline scenario and want to send your data :-/

JavaScript conversion always has its limits:

https://github.com/lalalic/docx2html — docx to html, most elements are supported, but project seems to be dead

https://github.com/mwilliamson/mammoth.js — supports headings, lists, tables, endnotes, footnotes, images and text boxes

https://www.npmjs.com/package/docx2html — Converts DOCX documents to HTML in the browser or nodejs, based on lalalic library, thus also dead

https://github.com/artburkart/docx2html — apparently, works in the browser, also dead

not sure, if there is a complete and supported project out there