Open Cart module in Modal window

-- url of the page with the problem -- : www.biolegend.com/

The page www.biolegend.com/ has a "My Cart" link in the upper right corner that opens in a modal window.

Can this be done with the HikaShop Cart Module?

Hi,

HikaShop's cart module has by default a dropdown display so that when you click on a link like that, you get the cart module details appearing below it in a similar way, but without the rest of the screen going grey.
So it's not exactly the same effect, but it's pretty close.
Now to have the module details in a modal popup, you can use an extension like that:
extensions.joomla.org/extension/module-in-modal/
And include the HikaShop cart module inside it.