VirtualizedList populated with getItem() only displaying the first 10 items

[agmathew]

Description

When populating a VirtualizedList using getItem() (i.e. not using data), the list only shows the first 10 items even if getItemCount() returns a number more than 10. This seems to happen irrespective of the setting of initialNumberToRender and windowSize. I'd expect that you would be able to see all items in the list.

Reproduction Steps and Sample Code

export default class ListTest extends Component {
  render() {
    return (
      <View>
        <VirtualizedList
          initialNumberToRender={20}
          windowSize={21}
          getItemCount={(data) => 365}
          getItem={(data, index) => {
            return { key: index };
          }}
          keyExtractor={(item, index) => {
            return item.key;
          }}
          renderItem={({ item, index }) => {
            return (
              <View style={{height:50}}>
                <Text>{item.key}</Text>
              </View>
            );
          }}
        />
      </View>
    );
  }
}

Solution

I peeked at the source code, but couldn't find a clear fix.

Additional Information

• React Native version: 0.43.3
• Platform: iOS
• Development Operating System: MacOS
• Dev tools: XCode 8.2.1

[hramos]

Hi there! This issue is being closed because it has been inactive for a while. Maybe the issue has been fixed in a recent release, or perhaps it is not affecting a lot of people. Either way, we're automatically closing issues after a period of inactivity. Please do not take it personally!

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[gastonmorixe]

+1

[gastonmorixe]

The property is called initialNumToRender not initialNumberToRender this is the first thing I have noticed that affects this issue. Still not resolved yet.

[MohamedOsman1998]

+1 this issue should be reopened

[gastonmorixe]

guys, you need to pass a data prop , either an array or your custom class and use it accordingly. data is mandatory.

[rmarimon]

Adding data={[]} to the example seems to solve the problem.