You can use grid's view getNode()
method. It returns HTMLElement of the grid record's row. If you want to do something with row HTML element you can use Ext.get()
method to obtain Ext.dom.Element
object.
// selected record
var selectedRecord = grid.getSelectionModel().getLastSelected();
// row HTMLElement
var node = grid.view.getNode(selectedRecord);
// Ext.dom.Element object
var el = Ext.get(node);