Office JS add-in minimum supported Office versions

Question

I am planning to develop a Office JS add-in for MS Office in both Windows and Mac OS for Word, Excel and PPT. But i am not sure from which Office version the add-in will work.

Kindly clarify it asap.

Answer 1

Office.js was introduced with Office 2013, so it won't work at all with earlier versions. The more recent the edition of Office, the more add-in features that are supported. Here is Microsoft's page about Office versions and Office.js Requirement Sets:
https://learn.microsoft.com/en-us/office/dev/add-ins/develop/office-versions-and-requirement-sets