Update to latest eslint-plugin-react-hooks (#36702)

Co-authored-by: diondiondion <mail@diondiondion.com>

app/javascript/mastodon/components/alt_text_badge.tsx

@@ -47,7 +47,7 @@ export const AltTextBadge: React.FC<{ description: string }> = ({
         rootClose
         onHide={handleClose}
         show={open}
-        target={anchorRef.current}
+        target={anchorRef}
         placement='top-end'
         flip
         offset={offset}

app/javascript/mastodon/components/carousel/index.tsx

@@ -76,6 +76,11 @@ export const Carousel = <
   // Handle slide change
   const [slideIndex, setSlideIndex] = useState(0);
   const wrapperRef = useRef<HTMLDivElement>(null);
+  // Handle slide heights
+  const [currentSlideHeight, setCurrentSlideHeight] = useState(
+    () => wrapperRef.current?.scrollHeight ?? 0,
+  );
+  const previousSlideHeight = usePrevious(currentSlideHeight);
   const handleSlideChange = useCallback(
     (direction: number) => {
       setSlideIndex((prev) => {
@@ -101,16 +106,11 @@ export const Carousel = <
     [items.length, onChangeSlide],
   );
 
-  // Handle slide heights
-  const [currentSlideHeight, setCurrentSlideHeight] = useState(
-    wrapperRef.current?.scrollHeight ?? 0,
-  );
-  const previousSlideHeight = usePrevious(currentSlideHeight);
-  const observerRef = useRef<ResizeObserver>(
-    new ResizeObserver(() => {
+  const observerRef = useRef<ResizeObserver | null>(null);
+  observerRef.current ??= new ResizeObserver(() => {
     handleSlideChange(0);
-    }),
-  );
+  });
+
   const wrapperStyles = useSpring({
     x: `-${slideIndex * 100}%`,
     height: currentSlideHeight,
@@ -200,7 +200,7 @@ export const Carousel = <
 };
 
 type CarouselSlideWrapperProps<SlideProps extends CarouselSlideProps> = {
-  observer: ResizeObserver;
+  observer: ResizeObserver | null;
   className: string;
   active: boolean;
   item: SlideProps;
@@ -217,7 +217,7 @@ const CarouselSlideWrapper = <SlideProps extends CarouselSlideProps>({
 }: CarouselSlideWrapperProps<SlideProps>) => {
   const handleRef = useCallback(
     (instance: HTMLDivElement | null) => {
-      if (instance) {
+      if (observer && instance) {
         observer.observe(instance);
       }
     },

app/javascript/mastodon/components/column_search_header.tsx

@@ -1,4 +1,4 @@
-import { useCallback, useState, useEffect, useRef } from 'react';
+import { useCallback, useState, useRef } from 'react';
 
 import { FormattedMessage } from 'react-intl';
 
@@ -12,11 +12,15 @@ export const ColumnSearchHeader: React.FC<{
   const inputRef = useRef<HTMLInputElement>(null);
   const [value, setValue] = useState('');
 
-  useEffect(() => {
+  // Reset the component when it turns from active to inactive.
+  // [More on this pattern](https://react.dev/learn/you-might-not-need-an-effect#adjusting-some-state-when-a-prop-changes)
+  const [previousActive, setPreviousActive] = useState(active);
+  if (active !== previousActive) {
+    setPreviousActive(active);
     if (!active) {
       setValue('');
     }
-  }, [active]);
+  }
 
   const handleChange = useCallback(
     ({ target: { value } }: React.ChangeEvent<HTMLInputElement>) => {

app/javascript/mastodon/components/dropdown/index.tsx

@@ -109,7 +109,7 @@ export const Dropdown: FC<
         placement='bottom-start'
         onHide={handleClose}
         flip
-        target={buttonRef.current}
+        target={buttonRef}
         popperConfig={{
           strategy: 'fixed',
           modifiers: [matchWidth],

app/javascript/mastodon/components/exit_animation_wrapper.tsx

@@ -27,22 +27,23 @@ export const ExitAnimationWrapper: React.FC<{
    */
   children: (delayedIsActive: boolean) => React.ReactNode;
 }> = ({ isActive = false, delayMs = 500, withEntryDelay, children }) => {
-  const [delayedIsActive, setDelayedIsActive] = useState(false);
+  const [delayedIsActive, setDelayedIsActive] = useState(
+    isActive && !withEntryDelay,
+  );
 
   useEffect(() => {
-    if (isActive && !withEntryDelay) {
-      setDelayedIsActive(true);
+    const withDelay = !isActive || withEntryDelay;
 
-      return () => '';
-    } else {
-      const timeout = setTimeout(() => {
+    const timeout = setTimeout(
+      () => {
         setDelayedIsActive(isActive);
-      }, delayMs);
+      },
+      withDelay ? delayMs : 0,
+    );
 
     return () => {
       clearTimeout(timeout);
     };
-    }
   }, [isActive, delayMs, withEntryDelay]);
 
   if (!isActive && !delayedIsActive) {

app/javascript/mastodon/components/hover_card_controller.tsx

@@ -27,7 +27,6 @@ export const HoverCardController: React.FC = () => {
   const [setLeaveTimeout, cancelLeaveTimeout] = useTimeout();
   const [setEnterTimeout, cancelEnterTimeout, delayEnterTimeout] = useTimeout();
   const [setScrollTimeout] = useTimeout();
-  const location = useLocation();
 
   const handleClose = useCallback(() => {
     cancelEnterTimeout();
@@ -36,9 +35,12 @@ export const HoverCardController: React.FC = () => {
     setAnchor(null);
   }, [cancelEnterTimeout, cancelLeaveTimeout, setOpen, setAnchor]);
 
-  useEffect(() => {
+  const location = useLocation();
+  const [previousLocation, setPreviousLocation] = useState(location);
+  if (location !== previousLocation) {
+    setPreviousLocation(location);
     handleClose();
-  }, [handleClose, location]);
+  }
 
   useEffect(() => {
     let isScrolling = false;

app/javascript/mastodon/components/icon_button.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, useCallback, forwardRef } from 'react';
+import { useCallback, forwardRef } from 'react';
 
 import classNames from 'classnames';
 
@@ -55,23 +55,6 @@ export const IconButton = forwardRef<HTMLButtonElement, Props>(
     },
     buttonRef,
   ) => {
-    const [activate, setActivate] = useState(false);
-    const [deactivate, setDeactivate] = useState(false);
-
-    useEffect(() => {
-      if (!animate) {
-        return;
-      }
-
-      if (activate && !active) {
-        setActivate(false);
-        setDeactivate(true);
-      } else if (!activate && active) {
-        setActivate(true);
-        setDeactivate(false);
-      }
-    }, [setActivate, setDeactivate, animate, active, activate]);
-
     const handleClick: React.MouseEventHandler<HTMLButtonElement> = useCallback(
       (e) => {
         e.preventDefault();
@@ -112,8 +95,8 @@ export const IconButton = forwardRef<HTMLButtonElement, Props>(
       active,
       disabled,
       inverted,
-      activate,
-      deactivate,
+      activate: animate && active,
+      deactivate: animate && !active,
       overlayed: overlay,
       'icon-button--with-counter': typeof counter !== 'undefined',
     });

app/javascript/mastodon/components/poll.tsx

@@ -35,6 +35,9 @@ const messages = defineMessages({
   },
 });
 
+const isPollExpired = (expiresAt: Model.Poll['expires_at']) =>
+  new Date(expiresAt).getTime() < Date.now();
+
 interface PollProps {
   pollId: string;
   status: Status;
@@ -58,8 +61,7 @@ export const Poll: React.FC<PollProps> = ({ pollId, disabled, status }) => {
     if (!poll) {
       return false;
     }
-    const expiresAt = poll.expires_at;
-    return poll.expired || new Date(expiresAt).getTime() < Date.now();
+    return poll.expired || isPollExpired(poll.expires_at);
   }, [poll]);
   const timeRemaining = useMemo(() => {
     if (!poll) {

app/javascript/mastodon/components/status_action_bar/remove_quote_hint.tsx

@@ -44,6 +44,7 @@ export const RemoveQuoteHint: React.FC<{
 
     if (!firstHintId) {
       firstHintId = uniqueId;
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setIsOnlyHint(true);
     }
 
@@ -64,8 +65,8 @@ export const RemoveQuoteHint: React.FC<{
           flip
           offset={[12, 10]}
           placement='bottom-end'
-          target={anchorRef.current}
-          container={anchorRef.current}
+          target={anchorRef}
+          container={anchorRef}
         >
           {({ props, placement }) => (
             <div

app/javascript/mastodon/containers/scroll_container/scroll_context.tsx

@@ -86,6 +86,7 @@ export const ScrollContext: React.FC<ScrollContextProps> = ({
         ) =>
           // Hack to allow accessing scrollBehavior._stateStorage
           shouldUpdateScroll.call(
+            // eslint-disable-next-line react-hooks/immutability
             scrollBehavior,
             prevLocationContext,
             locationContext,

app/javascript/mastodon/features/alt_text_modal/index.tsx

@@ -101,16 +101,17 @@ const Preview: React.FC<{
   position: FocalPoint;
   onPositionChange: (arg0: FocalPoint) => void;
 }> = ({ mediaId, position, onPositionChange }) => {
-  const draggingRef = useRef<boolean>(false);
   const nodeRef = useRef<HTMLImageElement | HTMLVideoElement | null>(null);
 
+  const [dragging, setDragging] = useState<'started' | 'moving' | null>(null);
+
   const [x, y] = position;
   const style = useSpring({
     to: {
       left: `${x * 100}%`,
       top: `${y * 100}%`,
     },
-    immediate: draggingRef.current,
+    immediate: dragging === 'moving',
   });
   const media = useAppSelector((state) =>
     (
@@ -123,8 +124,6 @@ const Preview: React.FC<{
     me ? state.accounts.get(me) : undefined,
   );
 
-  const [dragging, setDragging] = useState(false);
-
   const setRef = useCallback(
     (e: HTMLImageElement | HTMLVideoElement | null) => {
       nodeRef.current = e;
@@ -140,20 +139,20 @@ const Preview: React.FC<{
 
       const handleMouseMove = (e: MouseEvent) => {
         const { x, y } = getPointerPosition(nodeRef.current, e);
-        draggingRef.current = true; // This will disable the animation for quicker feedback, only do this if the mouse actually moves
+
+        setDragging('moving'); // This will disable the animation for quicker feedback, only do this if the mouse actually moves
         onPositionChange([x, y]);
       };
 
       const handleMouseUp = () => {
-        setDragging(false);
-        draggingRef.current = false;
+        setDragging(null);
         document.removeEventListener('mouseup', handleMouseUp);
         document.removeEventListener('mousemove', handleMouseMove);
       };
 
       const { x, y } = getPointerPosition(nodeRef.current, e.nativeEvent);
 
-      setDragging(true);
+      setDragging('started');
       onPositionChange([x, y]);
 
       document.addEventListener('mouseup', handleMouseUp);

app/javascript/mastodon/features/annual_report/index.tsx

@@ -31,15 +31,13 @@ export const AnnualReport: React.FC<{
   year: string;
 }> = ({ year }) => {
   const [response, setResponse] = useState<AnnualReportResponse | null>(null);
-  const [loading, setLoading] = useState(false);
+  const [loading, setLoading] = useState(true);
   const currentAccount = useAppSelector((state) =>
     me ? state.accounts.get(me) : undefined,
   );
   const dispatch = useAppDispatch();
 
   useEffect(() => {
-    setLoading(true);
-
     apiRequestGet<AnnualReportResponse>(`v1/annual_reports/${year}`)
       .then((data) => {
         dispatch(importFetchedStatuses(data.statuses));

app/javascript/mastodon/features/compose/components/language_dropdown.tsx

@@ -55,6 +55,8 @@ const getFrequentlyUsedLanguages = createSelector(
       .toArray(),
 );
 
+const isTextLongEnoughForGuess = (text: string) => text.length > 20;
+
 const LanguageDropdownMenu: React.FC<{
   value: string;
   guess?: string;
@@ -375,14 +377,27 @@ export const LanguageDropdown: React.FC = () => {
   );
 
   useEffect(() => {
-    if (text.length > 20) {
+    if (isTextLongEnoughForGuess(text)) {
       debouncedGuess(text, setGuess);
     } else {
       debouncedGuess.cancel();
-      setGuess('');
     }
   }, [text, setGuess]);
 
+  // Keeping track of the previous render's text length here
+  // to be able to reset the guess when the text length drops
+  // below the threshold needed to make a guess
+  const [wasLongText, setWasLongText] = useState(() =>
+    isTextLongEnoughForGuess(text),
+  );
+  if (wasLongText !== isTextLongEnoughForGuess(text)) {
+    setWasLongText(isTextLongEnoughForGuess(text));
+
+    if (wasLongText) {
+      setGuess('');
+    }
+  }
+
   return (
     <div ref={targetRef}>
       <button

app/javascript/mastodon/features/compose/components/search.tsx

@@ -1,4 +1,4 @@
-import { useCallback, useState, useRef, useEffect } from 'react';
+import { useCallback, useState, useRef, useEffect, useMemo } from 'react';
 
 import {
   defineMessages,
@@ -97,19 +97,29 @@ export const Search: React.FC<{
   const [expanded, setExpanded] = useState(false);
   const [selectedOption, setSelectedOption] = useState(-1);
   const [quickActions, setQuickActions] = useState<SearchOption[]>([]);
-  useEffect(() => {
-    setValue(initialValue ?? '');
-    setQuickActions([]);
-  }, [initialValue]);
-  const searchOptions: SearchOption[] = [];
 
   const unfocus = useCallback(() => {
     document.querySelector('.ui')?.parentElement?.focus();
     setExpanded(false);
   }, []);
 
-  if (searchEnabled) {
-    searchOptions.push(
+  const insertText = useCallback((text: string) => {
+    setValue((currentValue) => {
+      if (currentValue === '') {
+        return text;
+      } else if (currentValue.endsWith(' ')) {
+        return `${currentValue}${text}`;
+      } else {
+        return `${currentValue} ${text}`;
+      }
+    });
+  }, []);
+
+  const searchOptions = useMemo(() => {
+    if (!searchEnabled) {
+      return [];
+    } else {
+      const options: SearchOption[] = [
         {
           key: 'prompt-has',
           label: (
@@ -131,7 +141,10 @@ export const Search: React.FC<{
           label: (
             <>
               <mark>is:</mark>{' '}
-            <FormattedList type='disjunction' value={['reply', 'sensitive']} />
+              <FormattedList
+                type='disjunction'
+                value={['reply', 'sensitive']}
+              />
             </>
           ),
           action: (e) => {
@@ -232,10 +245,14 @@ export const Search: React.FC<{
             insertText('in:');
           },
         },
-    );
+      ];
+      return options;
     }
+  }, [insertText]);
 
-  const recentOptions: SearchOption[] = recent.map((search) => ({
+  const recentOptions: SearchOption[] = useMemo(
+    () =>
+      recent.map((search) => ({
         key: `${search.type}/${search.q}`,
         label: labelForRecentSearch(search),
         action: () => {
@@ -248,7 +265,10 @@ export const Search: React.FC<{
           } else {
             const queryParams = new URLSearchParams({ q: search.q });
             if (search.type) queryParams.set('type', search.type);
-        history.push({ pathname: '/search', search: queryParams.toString() });
+            history.push({
+              pathname: '/search',
+              search: queryParams.toString(),
+            });
           }
 
           unfocus();
@@ -257,23 +277,17 @@ export const Search: React.FC<{
           e.stopPropagation();
           void dispatch(forgetSearchResult(search));
         },
-  }));
+      })),
+    [dispatch, history, recent, unfocus],
+  );
 
-  const navigableOptions = hasValue
+  const navigableOptions: SearchOption[] = useMemo(
+    () =>
+      hasValue
         ? quickActions.concat(searchOptions)
-    : recentOptions.concat(quickActions, searchOptions);
-
-  const insertText = (text: string) => {
-    setValue((currentValue) => {
-      if (currentValue === '') {
-        return text;
-      } else if (currentValue.endsWith(' ')) {
-        return `${currentValue}${text}`;
-      } else {
-        return `${currentValue} ${text}`;
-      }
-    });
-  };
+        : recentOptions.concat(quickActions, searchOptions),
+    [hasValue, quickActions, recentOptions, searchOptions],
+  );
 
   const submit = useCallback(
     (q: string, type?: SearchType) => {

app/javascript/mastodon/features/domain_blocks/index.tsx

@@ -19,14 +19,12 @@ const messages = defineMessages({
 const Blocks: React.FC<{ multiColumn: boolean }> = ({ multiColumn }) => {
   const intl = useIntl();
   const [domains, setDomains] = useState<string[]>([]);
-  const [loading, setLoading] = useState(false);
+  const [loading, setLoading] = useState(true);
   const [next, setNext] = useState<string | undefined>();
   const hasMore = !!next;
   const columnRef = useRef<ColumnRef>(null);
 
   useEffect(() => {
-    setLoading(true);
-
     void apiGetDomainBlocks()
       .then(({ domains, links }) => {
         const next = links.refs.find((link) => link.rel === 'next');
@@ -40,7 +38,7 @@ const Blocks: React.FC<{ multiColumn: boolean }> = ({ multiColumn }) => {
       .catch(() => {
         setLoading(false);
       });
-  }, [setLoading, setDomains, setNext]);
+  }, []);
 
   const handleLoadMore = useCallback(() => {
     setLoading(true);

app/javascript/mastodon/features/home_timeline/components/announcements/announcement.tsx

@@ -35,12 +35,17 @@ export const Announcement: FC<AnnouncementProps> = ({
   }, [active, id, dispatch, read]);
 
   // But visually show the announcement as read only when it goes out of view.
-  const [unread, setUnread] = useState(!read);
-  useEffect(() => {
-    if (!active && unread !== !read) {
-      setUnread(!read);
+  const [isVisuallyRead, setIsVisuallyRead] = useState(read);
+  const [previousActive, setPreviousActive] = useState(active);
+  if (active !== previousActive) {
+    setPreviousActive(active);
+
+    // This marks the announcement as read in the UI only after it
+    // went from active to inactive.
+    if (!active && isVisuallyRead !== read) {
+      setIsVisuallyRead(read);
+    }
   }
-  }, [active, unread, read]);
 
   return (
     <AnimateEmojiProvider>
@@ -63,7 +68,7 @@ export const Announcement: FC<AnnouncementProps> = ({
 
       <ReactionsBar reactions={announcement.reactions} id={announcement.id} />
 
-      {unread && <span className='announcements__unread' />}
+      {!isVisuallyRead && <span className='announcements__unread' />}
     </AnimateEmojiProvider>
   );
 };

app/javascript/mastodon/features/lists/members.tsx

@@ -164,12 +164,11 @@ const ListMembers: React.FC<{
   const [searching, setSearching] = useState(false);
   const [accountIds, setAccountIds] = useState<string[]>([]);
   const [searchAccountIds, setSearchAccountIds] = useState<string[]>([]);
-  const [loading, setLoading] = useState(true);
+  const [loading, setLoading] = useState(!!id);
   const [mode, setMode] = useState<Mode>('remove');
 
   useEffect(() => {
     if (id) {
-      setLoading(true);
       dispatch(fetchList(id));
 
       void apiGetAccounts(id)

app/javascript/mastodon/features/navigation_panel/components/list_panel.tsx

@@ -27,17 +27,15 @@ export const ListPanel: React.FC = () => {
   const intl = useIntl();
   const dispatch = useAppDispatch();
   const lists = useAppSelector((state) => getOrderedLists(state));
-  const [loading, setLoading] = useState(false);
+  const [loading, setLoading] = useState(true);
 
   useEffect(() => {
-    setLoading(true);
-
     void dispatch(fetchLists()).then(() => {
       setLoading(false);
 
       return '';
     });
-  }, [dispatch, setLoading]);
+  }, [dispatch]);
 
   return (
     <CollapsiblePanel

app/javascript/mastodon/features/search/index.tsx

@@ -225,7 +225,7 @@ export const SearchResults: React.FC<{ multiColumn: boolean }> = ({
       />
 
       <div className='explore__search-header'>
-        <Search singleColumn initialValue={trimmedValue} />
+        <Search singleColumn initialValue={trimmedValue} key={trimmedValue} />
       </div>
 
       <div className='account__section-headline'>

app/javascript/mastodon/features/ui/components/domain_block_modal.tsx

@@ -53,8 +53,6 @@ export const DomainBlockModal: React.FC<{
   }, [dispatch]);
 
   useEffect(() => {
-    setLoading(true);
-
     apiRequest<DomainBlockPreviewResponse>('GET', 'v1/domain_blocks/preview', {
       params: { domain },
       timeout: 5000,
@@ -68,7 +66,7 @@ export const DomainBlockModal: React.FC<{
         setPreview('error');
         setLoading(false);
       });
-  }, [setPreview, setLoading, domain]);
+  }, [domain]);
 
   return (
     <div className='modal-root__modal safety-action-modal' aria-live='polite'>

app/javascript/mastodon/features/ui/components/hashtag_menu_controller.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useRef, useState, useCallback, useMemo } from 'react';
+import { useEffect, useState, useCallback, useMemo } from 'react';
 
 import { useIntl, defineMessages } from 'react-intl';
 
@@ -41,40 +41,44 @@ const isHashtagLink = (
 };
 
 interface TargetParams {
-  hashtag?: string;
-  accountId?: string;
+  element: HTMLAnchorElement | null;
+  hashtag: string;
+  accountId: string;
 }
 
 export const HashtagMenuController: React.FC = () => {
   const intl = useIntl();
   const { signedIn } = useIdentity();
-  const [open, setOpen] = useState(false);
-  const [{ accountId, hashtag }, setTargetParams] = useState<TargetParams>({});
-  const targetRef = useRef<HTMLAnchorElement | null>(null);
-  const location = useLocation();
+
+  const [target, setTarget] = useState<TargetParams | null>(null);
+  const { element = null, accountId, hashtag } = target ?? {};
+  const open = !!element;
+
   const account = useAppSelector((state) =>
     accountId ? state.accounts.get(accountId) : undefined,
   );
 
-  useEffect(() => {
-    setOpen(false);
-    targetRef.current = null;
-  }, [setOpen, location]);
+  const location = useLocation();
+  const [previousLocation, setPreviousLocation] = useState(location);
+  if (location !== previousLocation) {
+    setPreviousLocation(location);
+    setTarget(null);
+  }
 
   useEffect(() => {
     const handleClick = (e: MouseEvent) => {
-      const target = (e.target as HTMLElement).closest('a');
+      const targetElement = (e.target as HTMLElement).closest('a');
 
       if (e.button !== 0 || e.ctrlKey || e.metaKey) {
         return;
       }
 
-      if (!isHashtagLink(target)) {
+      if (!isHashtagLink(targetElement)) {
         return;
       }
 
-      const hashtag = target.text.replace(/^#/, '');
-      const accountId = target.getAttribute('data-menu-hashtag');
+      const hashtag = targetElement.text.replace(/^#/, '');
+      const accountId = targetElement.getAttribute('data-menu-hashtag');
 
       if (!hashtag || !accountId) {
         return;
@@ -82,9 +86,7 @@ export const HashtagMenuController: React.FC = () => {
 
       e.preventDefault();
       e.stopPropagation();
-      targetRef.current = target;
-      setOpen(true);
-      setTargetParams({ hashtag, accountId });
+      setTarget({ element: targetElement, hashtag, accountId });
     };
 
     document.addEventListener('click', handleClick, { capture: true });
@@ -92,12 +94,11 @@ export const HashtagMenuController: React.FC = () => {
     return () => {
       document.removeEventListener('click', handleClick);
     };
-  }, [setTargetParams, setOpen]);
+  }, []);
 
   const handleClose = useCallback(() => {
-    setOpen(false);
-    targetRef.current = null;
-  }, [setOpen]);
+    setTarget(null);
+  }, []);
 
   const menu = useMemo(() => {
     const arr: MenuItem[] = [
@@ -139,7 +140,7 @@ export const HashtagMenuController: React.FC = () => {
       offset={offset}
       placement='bottom'
       flip
-      target={targetRef}
+      target={element}
       popperConfig={popperConfig}
     >
       {({ props, arrowProps, placement }) => (

app/javascript/mastodon/features/ui/components/media_modal.tsx

@@ -66,6 +66,7 @@ export const MediaModal: FC<MediaModalProps> = forwardRef<
     _ref,
   ) => {
     const [index, setIndex] = useState(startIndex);
+    const [zoomedIn, setZoomedIn] = useState(false);
     const currentMedia = media.get(index);
 
     const handleChangeIndex = useCallback(
@@ -134,7 +135,6 @@ export const MediaModal: FC<MediaModalProps> = forwardRef<
       }
     }, []);
 
-    const [zoomedIn, setZoomedIn] = useState(false);
     const zoomable =
       currentMedia?.get('type') === 'image' &&
       ((currentMedia.getIn(['meta', 'original', 'width']) as number) >

app/javascript/mastodon/features/ui/hooks/useBreakpoint.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect } from 'react';
+import { useSyncExternalStore } from 'react';
 
 const breakpoints = {
   narrow: 479, // Device width under which horizontal space is constrained
@@ -9,25 +9,20 @@ const breakpoints = {
 type Breakpoint = keyof typeof breakpoints;
 
 export const useBreakpoint = (breakpoint: Breakpoint) => {
-  const [isMatching, setIsMatching] = useState(false);
+  const query = `(max-width: ${breakpoints[breakpoint]}px)`;
 
-  useEffect(() => {
-    const mediaWatcher = window.matchMedia(
-      `(max-width: ${breakpoints[breakpoint]}px)`,
-    );
+  const isMatching = useSyncExternalStore(
+    (callback) => {
+      const mediaWatcher = window.matchMedia(query);
 
-    setIsMatching(mediaWatcher.matches);
-
-    const handleChange = (e: MediaQueryListEvent) => {
-      setIsMatching(e.matches);
-    };
-
-    mediaWatcher.addEventListener('change', handleChange);
+      mediaWatcher.addEventListener('change', callback);
 
       return () => {
-      mediaWatcher.removeEventListener('change', handleChange);
+        mediaWatcher.removeEventListener('change', callback);
       };
-  }, [breakpoint, setIsMatching]);
+    },
+    () => window.matchMedia(query).matches,
+  );
 
   return isMatching;
 };

app/javascript/mastodon/hooks/usePrevious.ts

@@ -1,4 +1,4 @@
-import { useRef, useEffect } from 'react';
+import { useState } from 'react';
 
 /**
  * Returns the previous state of the passed in value.
@@ -6,11 +6,21 @@ import { useRef, useEffect } from 'react';
  */
 
 export function usePrevious<T>(value: T): T | undefined {
-  const ref = useRef<T>();
+  const [{ previous, current }, setMemory] = useState<{
+    previous: T | undefined;
+    current: T;
+  }>(() => ({ previous: undefined, current: value }));
 
-  useEffect(() => {
-    ref.current = value;
-  }, [value]);
+  let result = previous;
 
-  return ref.current;
+  if (value !== current) {
+    setMemory({
+      previous: current,
+      current: value,
+    });
+    // Ensure that the returned result updates synchronously
+    result = current;
+  }
+
+  return result;
 }

eslint.config.mjs

@@ -184,7 +184,7 @@ export default tseslint.config([
   ]),
   react.configs.flat.recommended,
   react.configs.flat['jsx-runtime'],
-  reactHooks.configs['recommended-latest'],
+  reactHooks.configs.flat.recommended,
   jsxA11Y.flatConfigs.recommended,
   importPlugin.flatConfigs.react,
   // @ts-expect-error -- For some reason the formatjs package exports an empty object?
@@ -329,7 +329,7 @@ export default tseslint.config([
       tseslint.configs.stylisticTypeChecked,
       react.configs.flat.recommended,
       react.configs.flat['jsx-runtime'],
-      reactHooks.configs['recommended-latest'],
+      reactHooks.configs.flat.recommended,
       jsxA11Y.flatConfigs.recommended,
       importPlugin.flatConfigs.react,
       importPlugin.flatConfigs.typescript,

package.json

@@ -174,7 +174,7 @@
     "eslint-plugin-jsx-a11y": "~6.10.2",
     "eslint-plugin-promise": "~7.2.1",
     "eslint-plugin-react": "^7.37.4",
-    "eslint-plugin-react-hooks": "^5.2.0",
+    "eslint-plugin-react-hooks": "^7.0.1",
     "eslint-plugin-storybook": "^10.0.2",
     "fake-indexeddb": "^6.0.1",
     "globals": "^16.0.0",

yarn.lock

@@ -299,10 +299,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@babel/helper-validator-identifier@npm:^7.27.1":
-  version: 7.27.1
-  resolution: "@babel/helper-validator-identifier@npm:7.27.1"
-  checksum: 10c0/c558f11c4871d526498e49d07a84752d1800bf72ac0d3dad100309a2eaba24efbf56ea59af5137ff15e3a00280ebe588560534b0e894a4750f8b1411d8f78b84
+"@babel/helper-validator-identifier@npm:^7.27.1, @babel/helper-validator-identifier@npm:^7.28.5":
+  version: 7.28.5
+  resolution: "@babel/helper-validator-identifier@npm:7.28.5"
+  checksum: 10c0/42aaebed91f739a41f3d80b72752d1f95fd7c72394e8e4bd7cdd88817e0774d80a432451bcba17c2c642c257c483bf1d409dd4548883429ea9493a3bc4ab0847
   languageName: node
   linkType: hard
 
@@ -334,14 +334,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@babel/parser@npm:^7.1.0, @babel/parser@npm:^7.20.7, @babel/parser@npm:^7.25.4, @babel/parser@npm:^7.27.2, @babel/parser@npm:^7.28.3, @babel/parser@npm:^7.28.4":
-  version: 7.28.4
-  resolution: "@babel/parser@npm:7.28.4"
+"@babel/parser@npm:^7.1.0, @babel/parser@npm:^7.20.7, @babel/parser@npm:^7.24.4, @babel/parser@npm:^7.25.4, @babel/parser@npm:^7.27.2, @babel/parser@npm:^7.28.3, @babel/parser@npm:^7.28.4":
+  version: 7.28.5
+  resolution: "@babel/parser@npm:7.28.5"
   dependencies:
-    "@babel/types": "npm:^7.28.4"
+    "@babel/types": "npm:^7.28.5"
   bin:
     parser: ./bin/babel-parser.js
-  checksum: 10c0/58b239a5b1477ac7ed7e29d86d675cc81075ca055424eba6485872626db2dc556ce63c45043e5a679cd925e999471dba8a3ed4864e7ab1dbf64306ab72c52707
+  checksum: 10c0/5bbe48bf2c79594ac02b490a41ffde7ef5aa22a9a88ad6bcc78432a6ba8a9d638d531d868bd1f104633f1f6bba9905746e15185b8276a3756c42b765d131b1ef
   languageName: node
   linkType: hard
 
@@ -1209,13 +1209,13 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@babel/types@npm:^7.0.0, @babel/types@npm:^7.18.9, @babel/types@npm:^7.20.7, @babel/types@npm:^7.21.3, @babel/types@npm:^7.25.4, @babel/types@npm:^7.26.10, @babel/types@npm:^7.27.1, @babel/types@npm:^7.27.3, @babel/types@npm:^7.28.2, @babel/types@npm:^7.28.4, @babel/types@npm:^7.4.4":
-  version: 7.28.4
-  resolution: "@babel/types@npm:7.28.4"
+"@babel/types@npm:^7.0.0, @babel/types@npm:^7.18.9, @babel/types@npm:^7.20.7, @babel/types@npm:^7.21.3, @babel/types@npm:^7.25.4, @babel/types@npm:^7.26.10, @babel/types@npm:^7.27.1, @babel/types@npm:^7.27.3, @babel/types@npm:^7.28.2, @babel/types@npm:^7.28.4, @babel/types@npm:^7.28.5, @babel/types@npm:^7.4.4":
+  version: 7.28.5
+  resolution: "@babel/types@npm:7.28.5"
   dependencies:
     "@babel/helper-string-parser": "npm:^7.27.1"
-    "@babel/helper-validator-identifier": "npm:^7.27.1"
-  checksum: 10c0/ac6f909d6191319e08c80efbfac7bd9a25f80cc83b43cd6d82e7233f7a6b9d6e7b90236f3af7400a3f83b576895bcab9188a22b584eb0f224e80e6d4e95f4517
+    "@babel/helper-validator-identifier": "npm:^7.28.5"
+  checksum: 10c0/a5a483d2100befbf125793640dec26b90b95fd233a94c19573325898a5ce1e52cdfa96e495c7dcc31b5eca5b66ce3e6d4a0f5a4a62daec271455959f208ab08a
   languageName: node
   linkType: hard
 
@@ -2796,7 +2796,7 @@ __metadata:
     eslint-plugin-jsx-a11y: "npm:~6.10.2"
     eslint-plugin-promise: "npm:~7.2.1"
     eslint-plugin-react: "npm:^7.37.4"
-    eslint-plugin-react-hooks: "npm:^5.2.0"
+    eslint-plugin-react-hooks: "npm:^7.0.1"
     eslint-plugin-storybook: "npm:^10.0.2"
     fake-indexeddb: "npm:^6.0.1"
     fast-glob: "npm:^3.3.3"
@@ -7178,12 +7178,18 @@ __metadata:
   languageName: node
   linkType: hard
 
-"eslint-plugin-react-hooks@npm:^5.2.0":
-  version: 5.2.0
-  resolution: "eslint-plugin-react-hooks@npm:5.2.0"
+"eslint-plugin-react-hooks@npm:^7.0.1":
+  version: 7.0.1
+  resolution: "eslint-plugin-react-hooks@npm:7.0.1"
+  dependencies:
+    "@babel/core": "npm:^7.24.4"
+    "@babel/parser": "npm:^7.24.4"
+    hermes-parser: "npm:^0.25.1"
+    zod: "npm:^3.25.0 || ^4.0.0"
+    zod-validation-error: "npm:^3.5.0 || ^4.0.0"
   peerDependencies:
     eslint: ^3.0.0 || ^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0-0 || ^9.0.0
-  checksum: 10c0/1c8d50fa5984c6dea32470651807d2922cc3934cf3425e78f84a24c2dfd972e7f019bee84aefb27e0cf2c13fea0ac1d4473267727408feeb1c56333ca1489385
+  checksum: 10c0/1e711d1a9d1fa9cfc51fa1572500656577201199c70c795c6a27adfc1df39e5c598f69aab6aa91117753d23cc1f11388579a2bed14921cf9a4efe60ae8618496
   languageName: node
   linkType: hard
 
@@ -8090,6 +8096,22 @@ __metadata:
   languageName: node
   linkType: hard
 
+"hermes-estree@npm:0.25.1":
+  version: 0.25.1
+  resolution: "hermes-estree@npm:0.25.1"
+  checksum: 10c0/48be3b2fa37a0cbc77a112a89096fa212f25d06de92781b163d67853d210a8a5c3784fac23d7d48335058f7ed283115c87b4332c2a2abaaccc76d0ead1a282ac
+  languageName: node
+  linkType: hard
+
+"hermes-parser@npm:^0.25.1":
+  version: 0.25.1
+  resolution: "hermes-parser@npm:0.25.1"
+  dependencies:
+    hermes-estree: "npm:0.25.1"
+  checksum: 10c0/3abaa4c6f1bcc25273f267297a89a4904963ea29af19b8e4f6eabe04f1c2c7e9abd7bfc4730ddb1d58f2ea04b6fee74053d8bddb5656ec6ebf6c79cc8d14202c
+  languageName: node
+  linkType: hard
+
 "history@npm:^4.10.1, history@npm:^4.9.0":
   version: 4.10.1
   resolution: "history@npm:4.10.1"
@@ -14736,3 +14758,19 @@ __metadata:
   checksum: 10c0/2d110bfcb0f8b8dbf225423f6556da9c5bca95c8b849c1218983676158a24b5cd0350357e0c4d504e27f8c7e18d471d9712576f35114a81a51bcf83453f02beb
   languageName: node
   linkType: hard
+
+"zod-validation-error@npm:^3.5.0 || ^4.0.0":
+  version: 4.0.2
+  resolution: "zod-validation-error@npm:4.0.2"
+  peerDependencies:
+    zod: ^3.25.0 || ^4.0.0
+  checksum: 10c0/0ccfec48c46de1be440b719cd02044d4abb89ed0e14c13e637cd55bf29102f67ccdba373f25def0fc7130e5f15025be4d557a7edcc95d5a3811599aade689e1b
+  languageName: node
+  linkType: hard
+
+"zod@npm:^3.25.0 || ^4.0.0":
+  version: 4.1.12
+  resolution: "zod@npm:4.1.12"
+  checksum: 10c0/b64c1feb19e99d77075261eaf613e0b2be4dfcd3551eff65ad8b4f2a079b61e379854d066f7d447491fcf193f45babd8095551a9d47973d30b46b6d8e2c46774
+  languageName: node
+  linkType: hard