function UserList() { const [users, setUsers] = useState([]) fetch('/api/users') .then(res => res.json()) .then(setUsers) return <div>{users.length}人</div> }
function UserList() { const [users, setUsers] = useState([]) fetch('/api/users') .then(res => res.json()) .then(setUsers) return <div>{users.length}人</div> }
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