# React - Criar um elemento JSX simples

**URL:** <https://forum.freecodecamp.org/t/react-criar-um-elemento-jsx-simples/750393>\
**Category:** General\
**Tags:** português\
**Created:** [June 10, 2025, 3:14pm UTC](https://forum.freecodecamp.org/t/react-criar-um-elemento-jsx-simples/750393 "2025-06-10T15:14:29Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![cauehenrique0211](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/cauehenrique0211/32/393843_2.png) [@cauehenrique0211](https://forum.freecodecamp.org/u/cauehenrique0211)\
**Post date:** [June 10, 2025, 3:14pm UTC](https://forum.freecodecamp.org/t/react-criar-um-elemento-jsx-simples/750393/1 "2025-06-10T15:14:29Z")

</div>

### Conte-nos o que está acontecendo:

na hora de executar os teste, esta travando e nao sai da pagina

### Seu código até o momento

```jsx
const JSX=<h1></h1>;
const JSX = <h1>Hello JSX!</h1>;

```

a hora de apertar executar teste esta travando e nao vai

### Informações do desafio:

React - Criar um elemento JSX simples

> **[freeCodeCamp.org](https://www.freecodecamp.org/portuguese/learn/front-end-development-libraries/react/create-a-simple-jsx-element)**
>
> Aprenda a programar — de graça

---

<div class="post-metadata">

**Author:** ![ILM](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/ilm/32/363239_2.png) [@ILM](https://forum.freecodecamp.org/u/ILM)\
**Post date:** [June 10, 2025, 3:18pm UTC](https://forum.freecodecamp.org/t/react-criar-um-elemento-jsx-simples/750393/2 "2025-06-10T15:18:57Z")

</div>

you can’t have two variables with the same name, you need to delete one of the lines

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<div class="post-metadata">

**Author:** ![cauehenrique0211](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/cauehenrique0211/32/393843_2.png) [@cauehenrique0211](https://forum.freecodecamp.org/u/cauehenrique0211)\
**Post date:** [June 11, 2025, 3:25pm UTC](https://forum.freecodecamp.org/t/react-criar-um-elemento-jsx-simples/750393/3 "2025-06-11T15:25:54Z")

</div>

### Tell us what’s happening:

nao consigo sair da pagina da um erro mesmo os codigos estando certo  
SyntaxError: unknown: Identifier ‘JSX’ has already been declared. (2:6)

### Your code so far

```jsx
const JSX=<h1></h1>;
const JSX = <h1>Hello JSX!</h1>;

```

### Your browser information:

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36`

### Challenge Information:

React - Create a Simple JSX Element

> **[freeCodeCamp.org](https://www.freecodecamp.org/learn/front-end-development-libraries/react/create-a-simple-jsx-element)**
>
> Learn to Code — For Free

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<div class="post-metadata">

**Author:** ![ILM](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/ilm/32/363239_2.png) [@ILM](https://forum.freecodecamp.org/u/ILM)\
**Post date:** [June 11, 2025, 3:30pm UTC](https://forum.freecodecamp.org/t/react-criar-um-elemento-jsx-simples/750393/4 "2025-06-11T15:30:14Z")

</div>

> [@cauehenrique0211](#):
>
> yntaxError: unknown: Identifier ‘JSX’ has already been declared. (2:6)

do you understand this error? you can’t have `JSX` twice

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<div class="post-metadata">

**Author:** ![ILM](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/ilm/32/363239_2.png) [@ILM](https://forum.freecodecamp.org/u/ILM)\
**Post date:** [January 16, 2026, 5:21pm UTC](https://forum.freecodecamp.org/t/react-criar-um-elemento-jsx-simples/750393/5 "2026-01-16T17:21:01Z")

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Closed on January 16, 2026, 5:21pm UTC