Add to Cart functionality issue

[developeryashraj]

Bug report

Describe the bug

When you click multiple times on "Add to Card" button multiple times. It pushes same product for multiple times in array. Whether it should only update the quantity if product is already in cart.

To Reproduce

Steps to reproduce the behavior, please provide code snippets or a repository:

1. Go to https://demo.reactstorefront.io/p/3
2. Click on 'Add to Card' multiple times. Just close the popup if it opens.
3. Go to Cart page https://demo.reactstorefront.io/cart
4. See Multiple entries of same product

Expected behavior

Quantity of the product should get updated in case if it's already in cart and user clicks on "Add to Card"

Screenshots

Product Page

Cart Page

System information

• OS: [e.g. macOS, Windows]
• Browser (if applies) [e.g. chrome, safari]
• Version of React Storefront: [e.g. 7.0.2]

Additional context

Add any other context about the problem here.