React Js Array filter Method

<!DOCTYPE html>
<html>

<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React
        function App() {
            const [strings, setStrings] = useState(['apple', 'banana', 'cherry', 'date']);
            const [filter, setFilter] = useState('');

const filteredStrings = strings.filter((str) => str.includes(filter));

return (
                <div className="container">
                    <h1>React Js Filtering strings containing a specific substring</h1>
                    <input
                        type="text"
                        value={filter}
                        onChange={(e) => setFilter(e.target.value)}
                        placeholder="Filter by substring"
                    />
                    <ul>
                        {filteredStrings.map((str, index) => (
                            <li key={index}>{str}</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
        }

h1 {
            font-size: 24px;
            margin-bottom: 20px;
        }

input[type="text"] {
            width: 100%;
            padding: 10px;
            font-size: 16px;
            border: 1px solid #ccc;
            border-radius: 4px;
            margin-bottom: 20px;
        }

ul {
            list-style-type: none;
            padding: 0;
            margin: 0;
            text-align: left;
        }

li {
            font-size: 18px;
            line-height: 24px;
            margin-bottom: 10px;
            border-bottom: 1px solid #ccc;
            padding-bottom: 10px;
        }

li:last-child {
            border-bottom: none;
        }
    </style>
</body>

</html>

 
<!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 } = React
        function App() {
            const [strings, setStrings] = useState(['apple', 'banana', 'cherry', 'date']);
            const [filter, setFilter] = useState('');
​
            const filteredStrings = strings.filter((str) => str.includes(filter));
​
            return (
                <div className="container">
                    <h1>React Js Filtering strings containing a specific substring</h1>
                    <input
                        type="text"
                        value={filter}
                        onChange={(e) => setFilter(e.target.value)}
                        placeholder="Filter by substring"
                    />
                    <ul>
                        {filteredStrings.map((str, index) => (
                            <li key={index}>{str}</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
        }
​
        h1 {
            font-size: 24px;
            margin-bottom: 20px;
        }
​
        input[type="text"] {
            width: 100%;
            padding: 10px;
            font-size: 16px;
            border: 1px solid #ccc;
            border-radius: 4px;
            margin-bottom: 20px;
        }
​
        ul {
            list-style-type: none;
            padding: 0;
            margin: 0;
            text-align: left;
        }
​
        li {
            font-size: 18px;
            line-height: 24px;
            margin-bottom: 10px;
            border-bottom: 1px solid #ccc;
            padding-bottom: 10px;
        }
​
        li:last-child {
            border-bottom: none;
        }
    </style>
</body>
​
</html>