Error virtualizedlists should never be nested inside plain scrollviews with the same orientation because it can break windowing and other functionality – use another virtualizedlist-backed container instead.

The error message “error virtualizedlists should never be nested inside plain scrollviews with the same orientation because it can break windowing and other functionality – use another virtualizedlist-backed container instead.” suggests that nesting a VirtualizedList component inside a ScrollView component with the same orientation can cause issues with the windowing and other functionalities of the app.

Windowing is a technique used in virtualized lists to efficiently render large lists by only rendering the visible items on the screen. The VirtualizedList component handles this optimization internally. However, when a VirtualizedList is nested inside a ScrollView with the same orientation, it can lead to conflicts between the two components and break the expected behavior.

To resolve this error, you need to use another container component that is backed by VirtualizedList instead of nesting it inside a ScrollView. One suitable container component is the FlatList, which is also a virtualized list component but specifically designed to be used as a top-level component.

Here’s an example of how you can modify your code to replace the ScrollView with a FlatList:

import React from "react";
import { FlatList, View, Text } from "react-native";

const YourComponent = () => {
  const data = [
    { id: 1, name: "Item 1" },
    { id: 2, name: "Item 2" },
    { id: 3, name: "Item 3" },
    // Additional items...
  ];

  const renderItem = ({ item }) => (
    <View style={{ padding: 16 }}>
      <Text>{item.name}</Text>
    </View>
  );

  return (
    <View style={{ flex: 1 }}>
      <FlatList
        data={data}
        renderItem={renderItem}
        keyExtractor={(item) => item.id.toString()}
      />
    </View>
  );
}

export default YourComponent;
   

In this example, we replaced the ScrollView with a FlatList component. The data prop of the FlatList represents the list of items to be rendered, the renderItem prop specifies how each item is rendered, and the keyExtractor prop defines a unique key for each item. You can customize the renderItem function to render your desired content for each item.

By using the FlatList component instead of nesting a VirtualizedList inside a ScrollView, you ensure that the windowing and other functionalities work as intended without conflicting with the ScrollView.