Learn how to build the simplest Office Add-in with only a manifest, HTML web page, and a logo. This sample will help you understand the fundamental parts of an Office Add-in. Display hello world in ...

Custom functions in Excel Custom functions enable you to add new functions to Excel by defining those functions in JavaScript as part of an add-in. Users within Excel can access custom functions just ...

Javascript custom functions are now supported in the Insider program's Excel (build 9325) so that developers can extend Excel's built-in function set.

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 ...

I mean, what could possibly go wrong? Last December, Microsoft published a Dev Center article that talked about using the new Excel JavaScript API to create add-ins for Excel 2016.

Microsoft is opening up Excel to developers with a new JavaScript API. It will let developers use custom data types like images, cards, and arrays.