Office suite (Excel, Word etc..) supports add-ins, either in web or desktop app (app is Windows-only). This document will explain how to create one using Office JavaScript API, step by step. A dual ...

This sample shows how to build an Excel add-in using .NET Blazor technologies. Blazor Webassembly allows you to build Office Add-ins using .NET, C#, and JavaScript to interact with the Office JS API.

Before we go further, it is important to note that this is just a proof of concept and to even use custom functions in Excel, you first need to be using the Office Insider version of Excel and to ...

At the Build 2018 developer conference that's taking place these days in Seattle, USA, Microsoft announced support for custom JavaScript functions in Excel. What this means is that Excel users will be ...

At its Ignite conference, Microsoft today announced an update to Excel that brings a new JavaScript API to the venerable spreadsheet app. With this new API, developers will be able to create custom ...