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FlatList onViewableItemsChanged method does't trigger when first render? #25812

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@wenzhihao123

Description

@wenzhihao123

React Native version: +

Steps To Reproduce

When i used FlatList in Android, when i first entered the page, why onViewableItemsChanged method does't trigger? Generally speaking, first render also means that the visibility of items have changed?

Describe what you expected to happen:

When first enter the page , onViewableItemsChanged method will trigger without scroll event !

My code just like this:

const VIEWABILITY_CONFIG = {
    minimumViewTime: 300,
    viewAreaCoveragePercentThreshold: 10,
    waitForInteraction: false,
};
...

<FlatList
      ...
      horizontal={false}
      numColumns={2}
      renderItem={({ item, index }) => this.renderItem(item, index)}
      ItemSeparatorComponent={this.renderSeparator}
      ListFooterComponent={this.footerView}
      ListHeaderComponent={this.rederListHeader()}
      onViewableItemsChanged={this._onViewableItemsChanged}
      viewabilityConfig={VIEWABILITY_CONFIG} />

Please write soon, thanks !

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