<script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.development.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.development.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
<script type="text/babel">
const { useState } = React;
const [originalArray, setOriginalArray] = useState(["Hello", "World", "React", "JS"]);
const convertArrayToLowerCase = () => {
const lowercaseArray = originalArray.map(item => item.toLowerCase());
setOriginalArray(lowercaseArray);
<div className='container'>
<h2>React Js Array Element to Lowercase</h2>
<button onClick={convertArrayToLowerCase}>Convert to Lowercase</button>
<p>{JSON.stringify(originalArray)}</p>
ReactDOM.render(<App />, document.getElementById("app"));
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
background-color: #3498db;
transition: background-color 0.3s ease;
background-color: #2980b9;