There has been no development activity on the Open-Xml-Sdk for JavaScript for several years. I am unaware of any new tools for writing Open XML code using JavaScript. Sorry, I wish I had a better answer for you, but I do not.
For others who may stumble into this thread, I’ve been using https://github.com/dolanmiu/docx to do some light docx generation. It’s not feature complete but it does a decent job. (it’s lack of feature completeness is the reason i’m kicking around fora looking for other examples of other tools that are more complete).
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