React Days Between Two Dates

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Days Between Two Dates</title>
</head>
<body>
    <h1 class="title">Javascript Calculate Days Between Two Dates</h1>
    <label for="date1" class="input-label">Enter the first date:</label>
    <input type="date" id="date1" class="date-input">
    <label for="date2" class="input-label">Enter the second date:</label>
    <input type="date" id="date2" class="date-input">

<button onclick="calculateDays()" class="calculate-button">Calculate</button>

const oneDay = 24 * 60 * 60 * 1000; // hours*minutes*seconds*milliseconds

const firstDate = new Date(date1);
            const secondDate = new Date(date2);

const diffDays = Math.round(Math.abs((firstDate - secondDate) / oneDay));

document.getElementById('result').textContent = `The number of days between ${date1} and ${date2} is: ${diffDays} days`;
        }
    </script>
    <style>
        body {
            width: 50%;
            margin: 0 auto
        }

.title {
            text-align: center;
            color: #333;
        }

.input-label {
            display: block;
            margin-top: 10px;
            font-weight: bold;
        }

.date-input {
            width: 100%;
            padding: 8px;
            margin-top: 5px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 5px;
            box-sizing: border-box;
        }

.calculate-button {
            background-color: #4caf50;
            color: white;
            padding: 10px 15px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
        }

.calculate-button:hover {
            background-color: #45a049;
        }
    </style>
</body>

</html>