mygrid.setOnGridReconstructed(onGridReconstructed);

is this how i set the handler ?:

mygrid.setOnGridReconstructed(onGridReconstructed);



am i missing anything?

Starting from dhtmlxgrid 1.6 the component fully deprecate old event setters ( if you still need them use dhtmlxgrid_deprecated.js )
Correct syntax is
    grid.attachEvent(“onGridReconstructed”,onGridReconstructed)
first - name of event
second - event handler function

dhtmlx.com/docs/products/dht … codeevents