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What are keys in React and why are they important? #542
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What are keys in React and why are they important? |
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Keys are unique identifiers used in lists to help React identify which items have changed, been added, or removed. Without keys, React would recreate all items in the list instead of updating only the affected ones. |
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Keys in React are unique identifiers used to differentiate elements in a list, helping React identify which items have changed, been added, or removed. They optimize rendering performance by enabling efficient updates to the virtual DOM. |
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Keys are unique identifiers used in lists to help React identify which items have changed, been added, or removed. Without keys, React would recreate all items in the list instead of updating only the affected ones.