freeCodeCamp/guide/english/certifications/front-end-libraries/react/define-an-html-class-in-jsx/index.md

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title: Define an HTML Class in JSX
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# Define an HTML Class in JSX

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## Problem Explanation
- HTML and JSX may seem that they are exactly the same but there are a few differences between them.
- One of these differences is the naming convention.
- HTML attributes and event references in JSX become camelCase(onclick => onClick).
- There may also be some words reserved in JavaScript.For instance the word "class" cant be use to define HTML classes
in JSX.Therefore instead of using "class" you can use "className".


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## Hints

### Hint 1
- You may want to change "class" to "className".


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## Solutions

<details><summary>Solution 1 (Click to Show/Hide)</summary>

```javascript
const JSX = (
  <div className='myDiv'>
    <h1>Add a class to this div</h1>
  </div>
);
```
</details>