Hello, Rashmi,
I assume that the issue occurs because the example is made to use the row data instead of a single cell data.
A possible way will be to get the content of the target element based on where the context menu is opened and programmatically set the value to the clipboard:
https://stackblitz.com/edit/react-xhmatr?file=app/main.jsx (test in full screen as the iframe of stackblitz is preventing the clipboard operation.)
If the issue still occurs, please share an example of it and I will be happy to assist further.
Regards,
Stefan
Progress Telerik