React-native FlatList separator

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The extraData prop is used to re-render the FlatList items dynamically . So what we are doing is that we make 2 Array in our tutorial and render the FlatList using first array object.

React Native FlatList Component

React Native FlatList Example

flatlist-simple By passing extraData={selectedId} to FlatList we make sure FlatList itself will re-render when the state changes. Without setting this prop, FlatList would not know it needs to re-render any items because it is a PureComponent and the prop comparison will not show any changes.19 Oca 2022