10/5/2023 0 Comments Key prop on react fragmentBy following these simple steps, you can optimize the rendering of your React components and improve the overall performance of your application. This means that React will only update the child elements that have changed, instead of updating all the child elements in the React Fragment.Īdding a key prop to a React Fragment may seem like a small optimization, but it can have a big impact on the performance of your application. This may seem not much, but as the depth of the tree increases, the added benefit of saving extra nodes also increases. We can use either an id property on the passed object or use the auto-assigning unique keys. React use this unique key mainly for performance improvements. See docs here Yes, you can add a key in the below form Fragment which is not possible in the shorter version of Fragments (i.e, <></>) You can also use this way to auto assign key to your component list.Thus, we are saving extra 45 - 31 14 nodes. The Warning: Each child in a list should have a unique key' prop happens in react when we create a list of elements without a key for each element. In older versions of React, we have to use 2d -1 + (2 (d-1) -2 ) 45 nodes.
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