How to determine if an Office Add-in is running under Excel or Excel Online?

Question

I\'m writing an Office Add-in (formerly, Apps for Office). I\'m using office.js and in some point of code I want to check if the app is running in excel (deskto

Answer 1

You can use document type:

if (Microsoft.Office.WebExtension.context.document instanceof OSF.DDA.ExcelWebAppDocument) {
                                    //Your app running on the web
                                }

if (Microsoft.Office.WebExtension.context.document instanceof OSF.DDA.ExcelDocument) {
                                    //Your app running in excel
                                }