We have two Add-Ins that were developed with VB script, one each for word document and excel document. These Add-Ins do some background work to replace placeholders in the template with the corresponding values provided.

We have an Angular application where user selects a word or excel template, at that time, the above mentioned Add-In based on the template type needs to be added/attached to the template.

I know how to create Add-in through Angular code, however, I don't know how to attach/add Add-in to the templates through Angular code.

Is it possible to attach an existing Add-in to the template in Angular application?