React Js Set Input Field Default Value

<!DOCTYPE html>
<html>

<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React

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

label {
            font-size: 14px;
            font-weight: bold;
            margin-bottom: 10px;
        }

input[type="text"] {
            width: 100%;
            padding: 8px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 14px;
        }

button[type="submit"] {
            margin-top: 20px;
            padding: 10px 16px;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            font-weight: bold;
            background-color: #007bff;
            color: #fff;
            cursor: pointer;
        }

button[type="submit"]:hover {
            background-color: #0056b3;
        }
    </style>
</body>

</html>