How to add in cart for temporary basis for without database?

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Javascript

Ajax

MVC

Hi,

I am working on a project. First see this website http://trolley.ae/[^].

In this website we can add the list of product either in login or without login.
Login Part we can add it to database and retrieve from there.

But challenging part is without login. How temorary basis stored the ProductId in the client side itself and once the user login we can add it to respective Database with customerid.

Any help

Thanks in advance