MS Office Web Add-ins
Office.js, FluentUI, React, TypeScript, JavaScript, Python, FastAPI, SQL
Example - Excel Add-in
Office Web Add-in that extends Excel with an interactive task pane and custom functions.
Why are Web add-ins better than legacy solutions?
Office Add-ins are web add-ins:

They provide the following advantages over add-ins built using VBA, COM, or VSTO:
- Cross-platform support: Office Add-ins run in Office on the web, Windows, Mac, and iPad.
- Centralized deployment and distribution: Admins can deploy Office Add-ins centrally across an organization.
- Easy access via Microsoft Marketplace: You can make your solution available to a broad audience by submitting it to Microsoft Marketplace.
- Based on standard web technology: You can use any library you like to build Office Add-ins.

Which MS Office applications support Office Web Add-ins?
- Excel
- OneNote
- Outlook
- PowerPoint
- Project
- Visio
- Web