Applying Subtotal and Changing Direction of Outline Summary Rows Below Detail

This article explains how to apply a subtotal to data and change the direction of Outline Summary Rows Below Detail.

You can apply a subtotal to data using the Worksheet.getCells().subtotal() method. It takes the following parameters.

• CellArea – The range to which the subtotal is applied.
• GroupBy – The field to group by, as a zero‑based integer offset.
• Function – The subtotal function.
• TotalList – An array of zero‑based field offsets indicating the fields to which the subtotals are added.
• Replace – Indicates whether to replace the current subtotals.
• PageBreaks – Indicates whether to add a page break between groups.
• SummaryBelowData – Indicates whether to add a summary below the data.

You can also control the direction of Outline Summary Rows Below Detail, as shown in the following screenshot, using the Worksheet.Outline.SummaryRowBelow property. This setting can be opened in Microsoft Excel via Data > Outline > Settings.

Images of source and output files

The following screenshot shows the source Excel file used in the sample code below, which contains some data in columns A and B.

The following screenshot shows the output Excel file generated by the sample code. As you can see, a subtotal has been applied to range A2:B11, and the outline direction is set to summary rows below detail.

Node.js code to apply a subtotal and change the direction of outline summary rows

Here is the sample code that produces the output shown above.