Identify if SelectAll is selected in case of oj-table when Multi Selection Mode is ON

Summary:

We want to fetch the keys/indexes of checked rows on the oj-table. We have enabled the Selection Mode, Row = Multiple.

Ideally, when the table loads, checkboxes are auto-populated, and based on the selection, we get the keys/indexes from TableSelectedChangeChain event.

There is a SELECT ALL checkbox at the header, when we click that field keys[] event has no data. This is the same when there is no row selected.

How to identify if SELECT ALL is selected in this case?

Content (required):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):