Sorry:
Please try this.
frappe.ui.form.on("Finished Goods Process Child", "finish_goods_process_child_add", function(frm) {
if ('grid' in cur_frm.fields_dict.finish_goods_process_child) {
var grid = cur_frm.fields_dict.finish_goods_process_child.grid;
var interval = setInterval(function () {
if ('cur_grid' in grid.frm) {
if(cur_frm.doc.typ != "Carton"){
grid.frm.cur_grid.fields_dict.carton_no.$wrapper.hide();
}else{
grid.frm.cur_grid.fields_dict.carton_no.$wrapper.show();
}
clearInterval(interval)
};
})
};
});