Microsoft Office Products Excel JavaScript API API for creating Excel add-ins and automating spreadsheet operations. Documentation GitHub Documentation 📖 Documentation https://learn.microsoft.com/en-us/javascript/api/excel Other Resources 🔗 REST API https://learn.microsoft.com/en-us/graph/api/resources/excel 🔗 Samples https://github.com/OfficeDev/Excel-Add-in-samples 🔗 Tutorial https://learn.microsoft.com/en-us/office/dev/add-ins/tutorials/excel-tutorial