React Js Convert String to Array | Splitting by commas.

<!DOCTYPE html>
<html>

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

function App() {
            const [testString, setTestString] = useState("font,awesome,icons");
            const [testArray, setTestArray] = useState([]);

useEffect(() => {
                const newArray = testString.split("|");
                setTestArray(newArray);
            }, []); // empty dependency array ensures it only runs once on mount

return (
                <div className='container'>
                    <h3>React Js Convert String into Array</h3>
                    <p>String = {testString}</p>
                    <p>Array = {JSON.stringify(testArray)}</p>
                </div>
            );
        }
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        * {
            box-sizing: border-box;
        }

.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 {
            color: #333;
            font-size: 24px;
            margin-bottom: 10px;
        }

p {
            color: #666;
            font-size: 16px;
            margin-bottom: 8px;
        }

p:last-child {
            margin-bottom: 0;
        }
    </style>
</body>

</html>