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---
title: Руководство по стилю
icon: paintbrush
description: Соглашения по коду и лучшие практики для внесения вклада в Twenty.
---
## React
### Только функциональные компоненты
Всегда используйте функциональные компоненты TSX с именованными экспортами.
```tsx
// ❌ Bad
const MyComponent = () => {
return <div>Hello World</div>;
};
export default MyComponent;
// ✅ Good
export function MyComponent() {
return <div>Hello World</div>;
};
```
### Свойства
Создайте тип с именем `{ComponentName}Props`. Используйте деструктуризацию. Не используйте `React.FC`.
```tsx
type MyComponentProps = {
name: string;
};
export const MyComponent = ({ name }: MyComponentProps) => <div>Hello {name}</div>;
```
### Не используйте спред одного объекта пропсов
```tsx
// ❌ Bad
const MyComponent = (props: MyComponentProps) => <Other {...props} />;
// ✅ Good
const MyComponent = ({ prop1, prop2 }: MyComponentProps) => <Other {...{ prop1, prop2 }} />;
```
## Управление состоянием
### Атомы Jotai для глобального состояния
```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',
});
```
* Предпочитайте атомы вместо проброса пропсов
* Не используйте `useRef` для состояния — используйте `useState` или атомы
* Используйте семейства атомов и селекторы для списков
### Избегайте лишних повторных рендеров
* Выносите `useEffect` и загрузку данных в соседние сайдкар-компоненты
* Предпочитайте обработчики событий (`handleClick`, `handleChange`) вместо `useEffect`
* Не используйте `React.memo()` — вместо этого исправьте первопричину
* Ограничьте использование `useCallback` или `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` вместо `interface`** — более гибкий, проще компоновать
* **Строковые литералы вместо перечислений** — за исключением перечислений из GraphQL codegen и внутренних API библиотеки
* **Без `any`** — строгий режим TypeScript обязателен
* **Без type-импортов** — используйте обычные импорты (принудительно через Oxlint `typescript/consistent-type-imports`)
* **Используйте [Zod](https://github.com/colinhacks/zod)** для проверки во время выполнения нетипизированных объектов
## JavaScript
```tsx
// Use nullish-coalescing (??) instead of ||
const value = process.env.MY_VALUE ?? 'default';
// Use optional chaining
onClick?.();
```
## Именование
* **Переменные**: camelCase, информативные (`email`, а не `value`, `fieldMetadata`, а не `fm`)
* **Константы**: SCREAMING_SNAKE_CASE
* **Типы/Классы**: PascalCase
* **Файлы/директории**: kebab-case (`.component.tsx`, `.service.ts`, `.entity.ts`)
* **Обработчики событий**: `handleClick` (не `onClick` для функции-обработчика)
* **Пропсы компонента**: используйте префикс имени компонента (`ButtonProps`)
* **Стилизованные компоненты**: префикс `Styled` (`StyledTitle`)
## Стилизация
Используйте стилизованные компоненты [Linaria](https://github.com/callstack/linaria). Используйте значения темы — избегайте жестко заданных `px`, `rem` или цветов.
```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)};
`;
```
## Импорт
Используйте алиасы вместо относительных путей:
```tsx
// ❌ Bad
import { Foo } from '../../../../../testing/decorators/Foo';
// ✅ Good
import { Foo } from '~/testing/decorators/Foo';
import { Bar } from '@/modules/bar/components/Bar';
```
## Структура папок
```
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, ...)
```
* Модули могут импортировать из других модулей, но `ui/` должен оставаться без зависимостей
* Используйте подпапки `internal/` для приватного кода модуля
* Компоненты — до 300 строк, сервисы — до 500 строк