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---
title: Guia de Estilo
icon: paintbrush
description: Convenções de código e práticas recomendadas para contribuir para o Twenty.
---
## React
### Apenas componentes funcionais
Use sempre componentes funcionais TSX com exportações nomeadas.
```tsx
// ❌ Bad
const MyComponent = () => {
return <div>Hello World</div>;
};
export default MyComponent;
// ✅ Good
export function MyComponent() {
return <div>Hello World</div>;
};
```
### Propriedades
Crie um tipo chamado `{ComponentName}Props`. Use desestruturação. Não use `React.FC`.
```tsx
type MyComponentProps = {
name: string;
};
export const MyComponent = ({ name }: MyComponentProps) => <div>Hello {name}</div>;
```
### Sem spread de props de uma única variável
```tsx
// ❌ Bad
const MyComponent = (props: MyComponentProps) => <Other {...props} />;
// ✅ Good
const MyComponent = ({ prop1, prop2 }: MyComponentProps) => <Other {...{ prop1, prop2 }} />;
```
## Gerenciamento de Estado
### Átomos do Jotai para estado global
```tsx
import { createAtomState } from '@/ui/utilities/state/jotai/utils/createAtomState';
import { useAtomState } from '@/ui/utilities/state/jotai/hooks/useAtomState';
export const myAtomState = createAtomState<string>({
key: 'myAtomState',
defaultValue: 'default value',
});
```
* Prefira átomos em vez de prop drilling
* Não use `useRef` para estado — use `useState` ou átomos
* Use famílias de átomos e seletores para listas
### Evite re-renderizações desnecessárias
* Extraia `useEffect` e busca de dados em componentes sidecar irmãos
* Prefira manipuladores de eventos (`handleClick`, `handleChange`) em vez de `useEffect`
* Não use `React.memo()` — corrija a causa raiz em vez disso
* Limite o uso de `useCallback` / `useMemo`
```tsx
// ❌ Bad — useEffect in the same component causes re-renders
export const Page = () => {
const [data, setData] = useAtomState(dataState);
const [dep] = useAtomState(depState);
useEffect(() => { setData(dep); }, [dep]);
return <div>{data}</div>;
};
// ✅ Good — extract into sibling
export const PageData = () => {
const [data, setData] = useAtomState(dataState);
const [dep] = useAtomState(depState);
useEffect(() => { setData(dep); }, [dep]);
return <></>;
};
export const Page = () => {
const [data] = useAtomState(dataState);
return <div>{data}</div>;
};
```
## TypeScript
* **`type` em vez de `interface`** — mais flexível, mais fácil de compor
* **Literais de string em vez de enums** — exceto para enums do codegen do GraphQL e APIs internas da biblioteca
* **Sem `any`** — TypeScript estrito aplicado
* **Sem imports de tipos** — use imports normais (aplicado pelo Oxlint `typescript/consistent-type-imports`)
* **Use [Zod](https://github.com/colinhacks/zod)** para validação em tempo de execução de objetos não tipados
## JavaScript
```tsx
// Use nullish-coalescing (??) instead of ||
const value = process.env.MY_VALUE ?? 'default';
// Use optional chaining
onClick?.();
```
## Nomenclatura
* **Variáveis**: camelCase, descritivas (`email` não `value`, `fieldMetadata` não `fm`)
* **Constantes**: SCREAMING_SNAKE_CASE
* **Tipos/Classes**: PascalCase
* **Arquivos/diretórios**: kebab-case (`.component.tsx`, `.service.ts`, `.entity.ts`)
* **Manipuladores de eventos**: `handleClick` (não `onClick` para a função manipuladora)
* **Props do componente**: prefixe com o nome do componente (`ButtonProps`)
* **Componentes estilizados**: prefixe com `Styled` (`StyledTitle`)
## Estilização
Use componentes estilizados do [Linaria](https://github.com/callstack/linaria). Use valores do tema — evite `px`, `rem` ou cores hardcoded.
```tsx
// ❌ Bad
const StyledButton = styled.button`
color: #333333;
font-size: 1rem;
margin-left: 4px;
`;
// ✅ Good
const StyledButton = styled.button`
color: ${({ theme }) => theme.font.color.primary};
font-size: ${({ theme }) => theme.font.size.md};
margin-left: ${({ theme }) => theme.spacing(1)};
`;
```
## Importações
Use aliases em vez de caminhos relativos:
```tsx
// ❌ Bad
import { Foo } from '../../../../../testing/decorators/Foo';
// ✅ Good
import { Foo } from '~/testing/decorators/Foo';
import { Bar } from '@/modules/bar/components/Bar';
```
## Estrutura de pastas
```
front
└── modules/ # Feature modules
│ └── module1/
│ ├── components/
│ ├── constants/
│ ├── contexts/
│ ├── graphql/ (fragments, queries, mutations)
│ ├── hooks/
│ ├── states/ (atoms, selectors)
│ ├── types/
│ └── utils/
└── pages/ # Route-level components
└── ui/ # Reusable UI components (display, input, feedback, ...)
```
* Módulos podem importar de outros módulos, mas `ui/` deve permanecer sem dependências
* Use subpastas `internal/` para código privado do módulo
* Componentes com menos de 300 linhas, serviços com menos de 500 linhas