Posted in react
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11:55 pm, October 11, 2021
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How to Define a HTML Class in JSX in React

When writing JSX you cant add classes like you would in HTML so this code would not work:

JSX

<div class="my-class"></div>

Instead we have to use className.

JSX uses camel case for a lot of its attributes, like onClick for onclick and onChange for onchange.

HTML

<div id="root"></div>

Scripts

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/18.0.0-alpha-5fa4d79b0-20211008/umd/react.production.min.js" integrity="sha512-5PVmWGoNJocWPdQJmJd1aRbz3cFcFgXctWKLWcitqtgX64jF+ttfg9g2oLltmeQ1HUo3gT6QchaMK3h+S+JG4Q==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/18.0.0-alpha-5fa4d79b0-20211008/umd/react-dom.production.min.js" integrity="sha512-pUsjUv+9XgkTn+UbLyNIT4YNZPF2p0E45FBKmDL7Ti8iovYwp2CUkQs6Q7J9y5scLxWaOM+T5jJc0ls+WHUcmQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
<script type="text/babel">
const JSX = (
  <div className="myDiv">
    <h1>Add a class to this div</h1>
  </div>
);
ReactDOM.render(JSX, document.getElementById('root'))
</script>

Add a class to this div

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