The simplest Office.js add-in for Microsoft Excel

This is the simplest possible Office.js add-in for Microsoft Excel (task pane only). It only consists of two files (and an icon in a few sizes):

• manifest-officejs-hello.xml
• taskpane.html

The HTML file is being served by GitHub pages.

You can play around with the add-in by sideloading manifest-officejs-hello.xml according to the office.js docs.

Note that this sample uses the raw Excel JavaScript API (no Python/xlwings).