I am converting a VSTO Excel add-in to a Web Excel add-in (using JavaScript API for Office). In my VSTO C# code I have the following line:
worksheet.Rows[rowStart + ":" + rowEnd].Group()
and a similar line for columns:
worksheet.Columns[colStart + ":" + colEnd].Group();
What is the equivalent API call for Office-JS? Could not find a relevant entry in the API Docs
I'm afraid that that kind of grouping is not yet supported in office.js. Please vote up the suggestion in the Office Developer Suggestion box: Grouping and ungrouping rows and columns.