How to save add/delete column in handson table

Getting help Questions
1

Like on persistentState, to save column width, sorting and move on localStorage
I want If any column I have add/delete, its saved on localstorage

If any other idea to implement this, please share.

2

You can get an actual set of data via getData() method. It will (by the number of objects/arrays) tell you how many columns and rows are in a current dataset.