<html>
<head>
<meta charset="UTF-8" />
<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>
</head>
<body>
<div id="app"></div>
<script type="text/babel">
const { useState, useEffect } = React;
function App() {
const array = [1, 2, 3, 4, 3, 2, 1];
const element = 3;
const lastIndex = array.lastIndexOf(element);
return (
<div className='container'>
<h3>React Js lastIndexOf() Method</h3>
<p>Last index of <span>{element}</span> in the array: <span>{lastIndex}</span></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
}
h3 {
font-size: 18px;
margin-bottom: 10px;
}
.container p {
font-size: 18px;
color: #333;
margin: 0;
}
.container p span {
font-weight: bold;
}
</style>
</body>
</html>