I need add the text "+/-" in the header of the collapse/expand column for details rows in kendo react. I also want to add and event so when the user clicks on that column, it expands or collapse all the rows. I've used this to create the details rows.
Telerik provided an answer for this: https://stackblitz.com/edit/react-abh1id?file=app/main.jsx
I've debugged kendo-react library and it's not possible to make it happen. I've open a feature request for kendo React https://feedback.telerik.com/kendo-react-ui/1408002-change-header-detail-rows