# Learning REACT Chapter 4 **URL:** \ **Category:** programming\ **Created:** [December 21, 2020, 9:58pm UTC](https://forum.kirupa.com/t/learning-react-chapter-4/645420 "2020-12-21T21:58:09Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![joeReact](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@joeReact](https://forum.kirupa.com/u/joeReact)\ **Post date:** [December 21, 2020, 9:58pm UTC](https://forum.kirupa.com/t/learning-react-chapter-4/645420/1 "2020-12-21T21:58:09Z")
Hi Kirupa, I am a beginner in React and following your book. Got stuck in chapter 2. The code is not working. className not doing anything. If I use div div div it’s fine. If I change it to .letter - nothing is happening . Could you please enlighten me, what is that I am doing wrong? Here is the code: ``` React ! React ! React!
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**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\ **Post date:** [December 22, 2020, 6:53pm UTC](https://forum.kirupa.com/t/learning-react-chapter-4/645420/2 "2020-12-22T18:53:48Z")
It is because you aren’t using the `Letter` component 🙂 If you replace the child `div` elements in your `render` function with the `Letter` element, you’ll see the correct behavior.