I want to select only four fow in child table after four row not add any row
frappe.ui.form.on("Child Table Name", {
field_name_add: (frm, cdt, cdn) => {
if(Object.keys(locals[cdt]).length == 4){
$(".grid-add-row").hide();
} else {
$(".grid-add-row").show();
}
}
})