Excel JavaScript API overview - Office Add-ins
An Excel add-in interacts with objects in Excel by using the Office JavaScript API, which includes two JavaScript object models: Excel JavaScript API: These are the application-specific APIs for Excel. Introduced with Office 2016, the Excel JavaScript API provides strongly-typed objects that you can use to access worksheets, ranges, tables, charts, and more.
https://docs.microsoft.com/ko-kr/office/dev/add-ins/reference/overview/excel-add-ins-reference-overview
