Ajax Drag and Drop Tutorial (with a cool video)

Adding items to a shopping cart in common e-commerce applications isn't very close to the actual "add to cart" metaphor, since it requires clicking an "add to cart" button, watch a new page (the shopping cart), and then go back to the shop or checkout with buttons. Ajax allows to get closer to the cart metaphor, by enabling drag-and-drop interactions and giving immediate visual feedback, without leaving the shop.

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