SectionList
SectionList is a specialized version of FlatList designed for rendering grouped data, where items are organized into sections with headers, such as a contacts list grouped by alphabet.
Basic Usage
Understanding the Data Structure
SectionList requires data to be structured as an array of section objects, each containing a title and a data array representing the items within that section.
Sticky Section Headers
The stickySectionHeadersEnabled prop keeps the current section header visible at the top of the screen while scrolling through its items, similar to iOS contact apps.
Adding Section Footers
The renderSectionFooter prop allows you to render custom content at the end of each section, useful for spacing or summary information.
Common Use Cases
- Alphabetically grouped contact lists
- Categorized product listings
- Date-grouped chat messages or notifications
SectionList vs FlatList
Use FlatList for simple, flat lists of data, and SectionList when your data naturally groups into categories that benefit from clear section headers.
Conclusion
SectionList provides an efficient and organized way to render grouped data with headers in React Native. It combines the performance benefits of FlatList with additional structure for categorized content.
