Prefetch adjacent Home pages (#6904)

src/view/com/feeds/FeedPage.tsx

@@ -32,6 +32,7 @@ const POLL_FREQ = 60e3 // 60sec
 export function FeedPage({
   testID,
   isPageFocused,
+  isPageAdjacent,
   feed,
   feedParams,
   renderEmptyState,
@@ -42,6 +43,7 @@ export function FeedPage({
   feed: FeedDescriptor
   feedParams?: FeedParams
   isPageFocused: boolean
+  isPageAdjacent: boolean
   renderEmptyState: () => JSX.Element
   renderEndOfFeed?: () => JSX.Element
   savedFeedConfig?: AppBskyActorDefs.SavedFeed
@@ -111,11 +113,11 @@ export function FeedPage({
         <FeedFeedbackProvider value={feedFeedback}>
           <Feed
             testID={testID ? `${testID}-feed` : undefined}
-            enabled={isPageFocused}
+            enabled={isPageFocused || isPageAdjacent}
             feed={feed}
             feedParams={feedParams}
             pollInterval={POLL_FREQ}
-            disablePoll={hasNew}
+            disablePoll={hasNew || !isPageFocused}
             scrollElRef={scrollElRef}
             onScrolledDownChange={setIsScrolledDown}
             onHasNew={setHasNew}

src/view/com/posts/Feed.tsx

@@ -216,7 +216,7 @@ let Feed = ({
     checkForNewRef.current = checkForNew
   }, [checkForNew])
   React.useEffect(() => {
-    if (enabled) {
+    if (enabled && !disablePoll) {
       const timeSinceFirstLoad = Date.now() - lastFetchRef.current
       // DISABLED need to check if this is causing random feed refreshes -prf
       /*if (timeSinceFirstLoad > REFRESH_AFTER) {
@@ -231,7 +231,7 @@ let Feed = ({
         checkForNewRef.current()
       }
     }
-  }, [enabled, feed, queryClient, scrollElRef])
+  }, [enabled, disablePoll, feed, queryClient, scrollElRef])
   React.useEffect(() => {
     let cleanup1: () => void | undefined, cleanup2: () => void | undefined
     const subscription = AppState.addEventListener('change', nextAppState => {