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[Perf] ChatForumLastMessage: Avoid redundant topic titles rendering

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This commit is contained in:
Alexander Zinchuk 2023-01-22 18:12:35 +01:00
parent 5ee98fd33c
commit 6213ed60d5
1 changed files with 6 additions and 1 deletions
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7
src/components/common/ChatForumLastMessage.tsx
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@ -28,6 +28,7 @@ type OwnProps = {
}; };
const NO_CORNER_THRESHOLD = Number(REM); const NO_CORNER_THRESHOLD = Number(REM);
const MAX_TOPICS = 3;
const ChatForumLastMessage: FC<OwnProps> = ({ const ChatForumLastMessage: FC<OwnProps> = ({
chat, chat,
@ -46,7 +47,11 @@ const ChatForumLastMessage: FC<OwnProps> = ({
const lastMessage = renderLastMessage(); const lastMessage = renderLastMessage();
const [lastActiveTopic, ...otherTopics] = useMemo(() => { const [lastActiveTopic, ...otherTopics] = useMemo(() => {
return chat.topics ? getOrderedTopics(Object.values(chat.topics), undefined, true) : []; if (!chat.topics) {
return [];
}
return getOrderedTopics(Object.values(chat.topics), undefined, true).slice(0, MAX_TOPICS);
}, [chat.topics]); }, [chat.topics]);
const [isReversedCorner, setIsReversedCorner] = useState(false); const [isReversedCorner, setIsReversedCorner] = useState(false);