How to organize viewing of files like xls, doc, ppt and other office types?

Question

JavaScript

In general, there is a server on nodejs and some visualization of the file system. You need to add the ability to view files. Such types as pdf, audio, video, pictures naturally do not cause problems, but what about office formats?
PS: it works locally, which means that all external APIs do not roll

Answer 1

It seems that there is no ready-made solution, but you can convert office formats to more suitable ones (for example, pdf or html).
This can be done in NodeJS via Child Process .