SectionList #

A performant interface for rendering sectioned lists, supporting the most handy features:

  • Fully cross-platform.
  • Configurable viewability callbacks.
  • List header support.
  • List footer support.
  • Item separator support.
  • Section header support.
  • Section separator support.
  • Heterogeneous data and item rendering support.
  • Pull to Refresh.
  • Scroll loading.

If you don't need section support and want a simpler interface, use <FlatList>.

Simple Examples:

<SectionList renderItem={({item}) => <ListItem title={item} />} renderSectionHeader={({section}) => <Header title={section.title} />} sections={[ // homogenous rendering between sections {data: [...], title: ...}, {data: [...], title: ...}, {data: [...], title: ...}, ]} /> <SectionList sections={[ // heterogeneous rendering between sections {data: [...], renderItem: ...}, {data: [...], renderItem: ...}, {data: [...], renderItem: ...}, ]} />

This is a convenience wrapper around <VirtualizedList>, and thus inherits its props (as well as those of ScrollView) that aren't explicitly listed here, along with the following caveats:

  • Internal state is not preserved when content scrolls out of the render window. Make sure all your data is captured in the item data or external stores like Flux, Redux, or Relay.
  • This is a PureComponent which means that it will not re-render if props remain shallow- equal. Make sure that everything your renderItem function depends on is passed as a prop (e.g. extraData) that is not === after updates, otherwise your UI may not update on changes. This includes the data prop and parent component state.
  • In order to constrain memory and enable smooth scrolling, content is rendered asynchronously offscreen. This means it's possible to scroll faster than the fill rate and momentarily see blank content. This is a tradeoff that can be adjusted to suit the needs of each application, and we are working on improving it behind the scenes.
  • By default, the list looks for a key prop on each item and uses that for the React key. Alternatively, you can provide a custom keyExtractor prop.

Props #

stickySectionHeadersEnabled?: #

Methods #

scrollToLocation(params: object) #

Scrolls to the item at the specified sectionIndex and itemIndex (within the section) positioned in the viewable area such that viewPosition 0 places it at the top (and may be covered by a sticky header), 1 at the bottom, and 0.5 centered in the middle. viewOffset is a fixed number of pixels to offset the final target position, e.g. to compensate for sticky headers.

Note: cannot scroll to locations outside the render window without specifying the getItemLayout prop.

recordInteraction() #

Tells the list an interaction has occured, which should trigger viewability calculations, e.g. if waitForInteractions is true and the user has not scrolled. This is typically called by taps on items or by navigation actions.

flashScrollIndicators() #

Displays the scroll indicators momentarily.

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