React Js Array Includes Method

<!DOCTYPE html>
<html>

</head>

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

function App() {
            const stringArray = ['apple', 'banana', 'orange', 'grape'];
            const searchString = 'banana';

const doesExist = stringArray.includes(searchString);

return (
                <div className='container'>
                    <h3>React Js includes Method</h3>
                    <p>String Array: {stringArray.join(', ')}</p>
                    <p>Search String: {searchString}</p>
                    <p>Does Exist? {doesExist ? 'Yes' : 'No'}</p>
                </div>
            );
        }

ReactDOM.render(<App />, document.getElementById('app'));
    </script>
    <style>
        .container {
            width: 400px;
            margin: 0 auto;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
            padding: 20px;
        }

</style>
</body>

</html>