Uncaught ReferenceError: cb is not defined

[salmanmuneer007]

Uncaught ReferenceError: cb is not defined
at HTMLButtonElement. (appAnalytics:3449)
at HTMLButtonElement.dispatch (jquery.min.js:3)
at HTMLButtonElement.r.handle (jquery.min.js:3)

Here is the code for btn reset and the error on line no 6

1 $("#btn-reset").click(function () {
2 $('.selectpicker').selectpicker('deselectAll');
3 $("#hidden-select-brand").val(0);
4 $("#hidden-select-store").val(0);
5 $("#hidden-select-region").val(0);
6 $("#hidden-select-app").val(0);
7 cb(moment().subtract(7, 'days'), moment());
8 });