What happens to list elements if their keys (indices) change?

If the keys of list items change, React will lose the connection between current elements and their states, leading to the following consequences:

• Components will be recreated instead of updated, reducing performance.
• Local component states (e.g., input text) will be lost.
• Visual artifacts or unexpected effects may occur during rendering.

Therefore, it is important to use stable and unique keys that do not change between renders so that React can efficiently differentiate and update list items.