React js Check if array empty or not

<!DOCTYPE html>
<html>

function App() {
            const myArray = []; // Replace this with your array

return (
                <div className='container'>
                    <h3>React Js check array is empty or not</h3>

{myArray.length === 0 ? (
                        <p>Array is empty</p>
                    ) : (
                        <p>Array is not empty</p>
                    )}
                </div>
            );
        }

ReactDOM.render(<App />, document.getElementById("app"));
    </script>

.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;
        }

h3 {
            margin-bottom: 10px;
            color: #333;
        }

p {
            font-size: 16px;
            color: #666;
        }

.container p {
            margin: 0;
        }

.container p:first-child {
            margin-top: 0;
        }
    </style>
</body>

</html>