In order for the client to understand that the product that he wanted to buy in the online store was added to the cart, you need to clearly show it. You can make a color change button to add goods to the cart, or change the text.
And you can do it through the animation of the object. And there is already enough imagination. You can make the product card itself fly into the cart and more.
Let me give you an example of such a small animation implemented using jQuery.
The add to cart button should be wrapped.
For example, you can create such HTML code
and this CSS
The result should be like this
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