Setting focus to a previously selected row in IG after Page Submit

1) Create a dynamic action on "selection change (interactive grid)"

The true action is "execute javascript code"

//set the static id field on your interactive grid and put the value on gridID variable

var gridID = "dept";

var ig$ = apex.region(gridID).widget();

var grid = ig$.interactiveGrid("getViews","grid");

var selectedRecord = grid.getSelectedRecords();

console.log(selectedRecord);

localStorage.setItem('lastSelectedRecord', JSON.stringify(selectedRecord));

2 - Create a dynamic action on "page load"

//set the static id field on your interactive grid and put the value on gridID variable

var gridID = "dept";

var ig$ = apex.region(gridID).widget();

var grid = ig$.interactiveGrid("getViews","grid");

grid.setSelectedRecords(JSON.parse(localStorage.getItem('lastSelectedRecord')));