What is React Native FlatList?

Quick Summary

React Native FlatList is a component that allows developers to render lists with minimal code and zero hassle. It is a performant interface for generating essential, flat lists, supporting the most handy features such as fully cross-platform, optional horizontal mode, configurable viewability callbacks, header support, footer support, separator support, pull to refresh, scroll loading, and scrollToIndex support.

What is React Native FlatList?

It is a component that renders items in a scrollable view. It is scrollable and eliminates the need for developers to write a loop function.

Developers only need to supply a list of items in an array, and the FlatList will render it for them in the most excellent ways possible.

React Native FlatList is a powerful element that offers several benefits to builders. It is a need-to-have factor for any React Native developer. FlatList is scrollable and eliminates the need for builders to write a loop characteristic.

It supports go-platform, optionally available horizontal mode, configurable viewability callbacks, header aid, footer help, separator help, pull to refresh, scroll loading, and scrollToIndex assist. FlatList is reasonably customizable and has several beneficial homes to trade its appearance and capability.

Basic Structure of FlatList

The FlatList component requires two primary properties for showing data on the screen: data and renderItem. The data is the elements to be rendered, while the renderItem takes each item and returns a formatted version.

Primary Props

• Data: The array to render.

• renderItem: Each item from the array will be rendered here.

Optional Props

• keyExtractor: Extract keys for each item in the array.

• ItemSeparatorComponent: Rendered in between each item.

• ListHeaderComponent: Rendered at the top of the list.

• ListFooterComponent: Rendered at the bottom of the list.

• onEndReached: Called when all rows have been rendered, and the list has been scrolled to the end.

• onEndReachedThreshold: How far from the end (in units of visible length of the list) the bottom edge of the list must be from the end of the content to trigger the onEndReached callback.

• onRefresh: Called when the view starts refreshing.

• Refreshing: Set this true while waiting for new data from a refresh.

FlatList Syntax

Copy Code

javascript

import { FlatList } from "react-native";

<FlatList 

  data={/* the array to render */}

  renderItem={/* each item from the array will be rendered here */}

  keyExtractor={/* extract keys for each item in the array */}

  ItemSeparatorComponent={/* rendered in between each item */}

  ListHeaderComponent={/* rendered at the top of the list */}

  ListFooterComponent={/* rendered at the bottom of the list */}

  onEndReached={/* called when all rows have been rendered and the list has been scrolled to the end */}

  onEndReachedThreshold={/* how far from the end (in units of visible length of the list) the bottom edge of the list must be from the end of the content to trigger the onEndReached callback */}

  onRefresh={/* called when the view starts refreshing */}

  refreshing={/* set this true while waiting for new data from a refresh */}
/>

What is the FlatList component?

FlatList is a React Native component that displays a collection of structured and often dynamic data in a scrollable view. It is a convenience wrapper around VirtualizedList and thus inherits its props (as well as those of ScrollView) that aren’t explicitly listed.

FlatList is scrollable and eliminates the need for developers to write a loop function. Developers only need to supply a list of items in an array, and the FlatList will render it for them in the most excellent ways possible.

Benefits of the FlatList component

React Native FlatList is an effective issue that offers numerous blessings to developers.

Some advantages of the FlatList issue are Render’s gadgets in a scrollable view: FlatList is a scrollable factor that permits builders to show a collection of based and frequently dynamic statistics in a scrollable view.

It is an excellent way to display gadgets in a scrollable list view.

• Eliminates the need for builders to write a loop characteristic : FlatList removes the need for developers to write a loop feature to render a listing of items. Developers most straightforwardly need to deliver a listing of gadgets in an array, and the FlatList will render it for them in the most excellent of methods possible.

• Supports fully move-platform: FlatList is a move-platform issue that works on both iOS and Android structures. It is a performant interface for rendering simple, flat lists, and it helps the most reachable capabilities inclusive of non-obligatory horizontal mode, configurable viewability callbacks, header support, footer aid, separator aid, pull to refresh, scroll loading, and scrollToIndex assist.

• Configurable viewability callbacks: Flatlist in react native supports configurable viewability callbacks that allow builders to personalize the advent and capability of the list. Developers can use those callbacks to decide which objects are presently seen on the display screen and perform moves based on those statistics.

• Header and footer support: FlatList helps header and footer components that permit builders to add custom headers and footers to the listing. This feature is beneficial when builders want to add additional information to the listing, such as a name or a summary.

• Separator guide: FlatList supports separator additives that allow builders to feature custom separators between items inside the listing. This function is beneficial when builders want to feature visual separation among objects inside the list.

• Pull to refresh: Flatlist in react native helps pull to refresh functionality that allows customers to refresh the list by knocking it down on the display screen. This feature is beneficial when developers need to permit customers to refresh the list manually.

• Scroll loading: FlatList helps scroll loading capability that lets builders load more excellent gadgets into the listing because the consumer scrolls down. This feature is beneficial when builders want to show an extensive list of devices that can not be loaded.

• ScrollToIndex assist: FlatList supports scrollToIndex capability that allows builders to scroll to a specific item in the list. This feature is helpful when builders want to enable users to jump to a particular item in the list.

Methods in FlatList

FlatList is an influential element in React Native that permits builders to render lists with minimal code and zero hassle. It is scrollable and eliminates the need for developers to write a loop feature. Flatlist react native has several methods that builders can use to govern the list. These techniques encompass

1. scrollToIndex: Scrolls to the item at the specified index.

This approach allows developers to scroll to the object at the required index. It takes an item as an issue that carries the index of the object to scroll to, the animated flag, and the view function. For example, scrollToIndex( index: five, animated: proper, viewPosition: zero. Five ) will scroll to the object at index five with animation and function inside the middle of the display.

2. scrollToEnd: Scroll to the end of the list.

This approach lets builders scroll to the end of the listing. It takes an item as an issue that consists of the animated flag. For example, scrollToEnd( lively: genuine ) will scroll to the end of the list with animation.

3. scrollToItem: Scroll to the item with the given itemIndex and sectionIndex.

This technique allows developers to scroll to the item with the given item index and section index. It takes an object as a controversy that carries the itemIndex, section Index, and animated flag and considers position. For example, scrollToItem( itemIndex: 5, sectionIndex: 2, animated: real, viewPosition: 0. Five ) will scroll to the item at itemIndex five and sectionIndex 2 with animation and position it within the middle of the screen.

4. scrollToOffset: Scrolls to the offset in the list.

This technique permits builders to scroll to the offset within the listing. It takes an object as an argument that contains the offset lively flag and considers position.

For example, scrollToOffset( offset: 500, lively: real, viewPosition: 0.5 ) will scroll to the offset 500 with animation and role it in the center of the screen.

These methods are functions that may be found in the FlatList class. Each React Native component is its magnificence, and it no longer best carries props; however, it has a few methods that allow the FlatList to perform certain moves.

When an occasion is precipitated, those strategies can carry out specific operations. Ultimately, Flatlist react native will enable builders to render lists with minimum code and zero hassle. It helps fully move-platform, non-compulsory horizontal mode, configurable viewability callbacks, header aid, footer support, separator help, pull to refresh, scroll loading, and scrollToIndex guide.

FlatList has several techniques that developers can use to control the list, which include scrollToIndex, scrollToEnd, scrollToItem, and scrollToOffset.

These methods permit developers to scroll to a specific position inside the list, scroll to the end of the listing, or scroll to the item with the given item index and section index.

Conclusion

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