Created
February 3, 2020 22:55
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Markdium-From React to Web Components: using hooks
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| useEffect(() => { | |
| const handleNewMessages = snap => { | |
| // avoid updating messages when there are no changes | |
| const changes = snap.docChanges() | |
| if (changes.length) { | |
| setMessages(snap.docs.map(doc => doc.data())) | |
| } | |
| } | |
| const unsubscribe = chatRoomMessages.onSnapshot(handleNewMessages); | |
| return unsubscribe; | |
| }); |
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