Add section in SectionListRenderItemInfo

types/react-native/index.d.ts

@@ -3973,7 +3973,7 @@ export interface SectionBase<ItemT> {
 
     key?: string;
 
-    renderItem?: ListRenderItem<ItemT>;
+    renderItem?: SectionListRenderItem<ItemT>;
 
     ItemSeparatorComponent?: React.ComponentClass<any> | (() => React.ReactElement<any>) | null;
 
@@ -3984,6 +3984,16 @@ export interface SectionListData<ItemT> extends SectionBase<ItemT> {
     [key: string]: any;
 }
 
+/**
+ * @see https://facebook.github.io/react-native/docs/sectionlist.html#props
+ */
+
+export interface SectionListRenderItemInfo<ItemT> extends ListRenderItemInfo<ItemT> {
+  section: SectionListData<ItemT>;
+}
+
+export type SectionListRenderItem<ItemT> = (info: SectionListRenderItemInfo<ItemT>) => React.ReactElement<any> | null;
+
 export interface SectionListProps<ItemT> extends ScrollViewProps {
     /**
      * Rendered in between adjacent Items within each section.
@@ -4087,7 +4097,7 @@ export interface SectionListProps<ItemT> extends ScrollViewProps {
     /**
      * Default renderer for every item in every section. Can be over-ridden on a per-section basis.
      */
-    renderItem?: ListRenderItem<ItemT>;
+    renderItem?: SectionListRenderItem<ItemT>;
 
     /**
      * Rendered at the top of each section. Sticky headers are not yet supported.

types/react-native/test/index.tsx

@@ -49,6 +49,7 @@ import {
     findNodeHandle,
     ScrollView,
     ScrollViewProps,
+    SectionListRenderItemInfo,
     RefreshControl,
     TabBarIOS,
     NativeModules,
@@ -350,9 +351,9 @@ export class SectionListTest extends React.Component<SectionListProps<string>, {
                             <Text>{section.title}</Text>
                         </View>
                     )}
-                    renderItem={(info: { item: string }) => (
+                    renderItem={(info: SectionListRenderItemInfo<string>) => (
                         <View>
-                            <Text>{info.item}</Text>
+                            <Text>{`${info.section.title} - ${info.item}`}</Text>
                         </View>
                     )}
                 />