<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 [text, setText] = useState("Make this #text #bold with start with (#)hash tag");
const formatTextWithHashTags = (text) => {
return text.replace(/#\w+/g, '<strong>$&</strong>');
<div className='container'>
<h1>React Js make text with (#)hash tag bold</h1>
<p>Normal Text: {text}</p>
<p dangerouslySetInnerHTML={{ __html: formatTextWithHashTags(text) }}></p>
ReactDOM.render(<App />, document.getElementById('app'));
box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
/* Styles remain unchanged */