Callback come faster then setState
Nobody has claimed this yet.
Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 25/100
- Issue type
- Bug
- Clarity
- Needs clarification
- Activity status
- Stale
- Tech stack
- firebase, javascript, react
- Domain
- frontend
Research direction
No file or test is named. Start with the commentsRef.on("child_changed") callback and the setGuests call shown in the issue, then trace how guests is captured across repeated callbacks. Done means successive child_changed events retain earlier updates and guests reflects each changed guest.
Written by the indexing model from the issue text.
Description
Hi all,
I am trying to setState the value of callback on data change,
The issue that the callback is faster then my setState ,
that making the prev state to update not correct values,
What can be done?
commentsRef.on("child_changed", (data) => {
if (guests) {
const key = data.key;
const updatedGuest = data.val();
//guests ->isnt updated from last trigger
const cloneGuests =_.cloneDeep(guests);
cloneGuests.forEach((element, index) => {
if (element.guestID === key) {
cloneGuests[index] = updatedGuest;
}
});
setGuests(cloneGuests);
}
});
- Dominant language
- JavaScript
- Stars
- 1.3k
- Forks
- 246
- PR merge metrics
- No merged PRs in 30d
Contributor guide
First steps
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- Open a pull request that references the issue number.
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