React Js Get All Dates Between Two Dates

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState, useEffect } = React;
        function App() {
            const [startDate, setStartDate] = useState('');
            const [endDate, setEndDate] = useState('');
            const [dateArray, setDateArray] = useState([]);
            const [startDateError, setStartDateError] = useState('');
            const [endDateError, setEndDateError] = useState('');

useEffect(() => {
                getDates();
            }, [startDate, endDate]);

const validateInput = () => {
                const start = new Date(startDate);
                const end = new Date(endDate);
                setStartDateError('');
                setEndDateError('');
                if (start > end) {
                    setStartDateError('Start date must be before end date');
                }
            };

return (
                <div className='container'>
                    <h3>React Js Get All Dates Between Two Dates</h3>
                    <div>
                        <label htmlFor="start-date">Start Date:</label>
                        <input
                            type="date"
                            id="start-date"
                            value={startDate}
                            onChange={(e) => setStartDate(e.target.value)}
                            onBlur={validateInput}
                        />

</div>
                    <div>
                        <label htmlFor="end-date">End Date:</label>
                        <input
                            type="date"
                            id="end-date"
                            value={endDate}
                            onChange={(e) => setEndDate(e.target.value)}
                            onBlur={validateInput}
                        />
                        {startDateError && <div className="error">{startDateError}</div>}
                        {endDateError && <div className="error">{endDateError}</div>}
                    </div>
                    <ul>
                        {dateArray.map((date) => (
                            <li key={date}>{formatDate(date)}</li>
                        ))}
                    </ul>
                </div>
            );
        }

ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        * {
            box-sizing: border-box;
        }

body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
        }

.container {
            text-align: center;
            padding: 20px;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
            margin: 0 auto;
            width: 600px;
        }

h3 {
            color: #333;
            font-size: 24px;
            margin-bottom: 20px;
        }

label {
            display: block;
            margin-bottom: 5px;
        }

input[type="date"] {
            width: 100%;
            padding: 8px;
            border: 1px solid #ccc;
            border-radius: 4px;
        }

.error {
            color: red;
            margin-top: 5px;
        }

ul {
            list-style-type: none;
            padding: 0;
        }

li {
            margin-bottom: 5px;
        }

li:before {
            content: "•";
            margin-right: 5px;
            color: #333;
        }
    </style>
</body>

</html>