No observer of history cursor index

[Nourbol]

Problem:
There is no built-in library feature that allows us to trigger a callback when the history cursor changes.

Example:
Consider a page with multiple spreadsheets, each having a custom toolbar with undo and redo operations. The requirement is that these undo and redo operations must apply across all spreadsheets. While a universal history helps achieve this, it becomes difficult to track whether the cursor is at the beginning or end of the history, which is needed to disable these operations appropriately.

Workaround:
Using setInterval to periodically check if the cursor's index has changed.

But we are not satisfied by using this workaround.

[Nourbol]

Version of jspreadsheet is 11.18.4.

[Ruan-Miguel]

Instead of using setInterval, you can do this check in the onevent event.

Also, based on the jspreadsheet version you provided, you are using the pro version, so you can send emails to support instead of creating issues in this repository.