I have a search bar that wont update whenever I press backspace - reactjs

Question

So I have a basic messenger chap application, the search bar to retrieve chats works fine whenever I type in letters, yet whenever I backspace, the event handler wont update, and I am left with the chat room lists that fit the search, even though the search bar is left empty.
Examples below
1.All chatrooms are shown below:
2.Typing "funny" filters a list with chatrooms labeled "funny":
3.Pressing backspace does not show all the chatrooms:
import { Avatar, IconButton } from '#material-ui/core';
import React, { useEffect, useState } from 'react';
import './Sidebar.css';
import SearchIcon from '#material-ui/icons/Search';
import { RateReviewOutlined } from '#material-ui/icons';
import { SidebarChat } from './SidebarChat';
import { useSelector } from 'react-redux';
import { selectUser } from './features/userSlice';
import db, { auth } from './firebase';
import { makeStyles } from '#material-ui/core/styles';
import Modal from '#material-ui/core/Modal';
import Backdrop from '#material-ui/core/Backdrop';
import Fade from '#material-ui/core/Fade';
const useStyles = makeStyles((theme) => ({
modal: {
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
},
paper: {
backgroundColor: theme.palette.background.paper,
border: '2px solid #000',
boxShadow: theme.shadows[5],
padding: theme.spacing(2, 4, 3),
},
}));
export function Sidebar(props) {
const user = useSelector(selectUser);
const [chats, setChats] = useState([]);
const classes = useStyles();
const [open, setOpen] = useState(false);
const [search, setSearch] = useState('');
const handleOpen = () => {
setOpen(true);
};
const handleClose = () => {
setOpen(false);
};
useEffect(() => {
db.collection('chats').onSnapshot((snapshot) =>
setChats(
snapshot.docs.map((doc) => ({
id: doc.id,
data: doc.data(),
}))
)
);
}, []);
const addChat = () => {
const chatName = prompt('Please enter a chat name');
if (chatName) {
db.collection('chats').add({
chatName: chatName,
});
}
};
const searchFunction = (e) => {
setSearch(e);
console.log(search);
console.log(chats);
const filtered = chats.filter(chat => {
return chat.data.chatName.toLowerCase().includes(e.toLowerCase())
});
// console.log(filtered)
setChats(filtered);
};
return (
<div className="sidebar">
<div className="sidebar__header">
<Avatar
onClick={handleOpen}
src={user.photo}
className="sidebar__avatar"
/>
<div className="sidebar__input">
<SearchIcon />
<input
placeholder="Search"
value={search}
onChange={(e) => searchFunction(e.target.value)}
/>
</div>
<IconButton variant="outlined" className="sidebar__inputButton">
<RateReviewOutlined onClick={addChat} />
</IconButton>
</div>
<div className="sidebar__chats">
{chats.map(({ id, data: { chatName } }) => (
<SidebarChat key={id} id={id} chatName={chatName} />
))}
</div>
<Modal
aria-labelledby="transition-modal-title"
aria-describedby="transition-modal-description"
className={classes.modal}
open={open}
onClose={handleClose}
closeAfterTransition
BackdropComponent={Backdrop}
BackdropProps={{
timeout: 500,
}}
>
<Fade in={open}>
<div className={classes.paper}>
<h2 id="transition-modal-title">
Are you sure you want to sign out?
</h2>
<button onClick={() => auth.signOut()}>Yes</button>
<button onClick={handleClose}>No</button>
</div>
</Fade>
</Modal>
</div>
);
}

Answer 1

In your searchFunction it is constantly updating filtered to have less and less chatrooms. You could store chat rooms as a separate state and then filter that instead to preserve all chat rooms.