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---
title: 样式指南
icon: paintbrush
description: 为 Twenty 做出贡献的代码约定和最佳实践。
---
## React
### 仅使用函数组件
始终使用带命名导出的 TSX 函数组件。
```tsx
// ❌ Bad
const MyComponent = () => {
return <div>Hello World</div>;
};
export default MyComponent;
// ✅ Good
export function MyComponent() {
return <div>Hello World</div>;
};
```
### 属性
创建一个名为 `{ComponentName}Props` 的类型。 使用解构。 不要使用 `React.FC`。
```tsx
type MyComponentProps = {
name: string;
};
export const MyComponent = ({ name }: MyComponentProps) => <div>Hello {name}</div>;
```
### 禁止仅为单个 prop 使用展开
```tsx
// ❌ Bad
const MyComponent = (props: MyComponentProps) => <Other {...props} />;
// ✅ Good
const MyComponent = ({ prop1, prop2 }: MyComponentProps) => <Other {...{ prop1, prop2 }} />;
```
## 状态管理
### 使用 Jotai 原子管理全局状态
```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',
});
```
* 优先使用原子,而非 props 逐层传递
* 不要将 `useRef` 用于状态 — 使用 `useState` 或原子。
* 对列表使用原子族和选择器。
### 避免不必要的重新渲染
* 将 `useEffect` 和数据获取提取到同级的 sidecar 组件中。
* 优先使用事件处理器(`handleClick`、`handleChange`)而不是 `useEffect`。
* 不要使用 `React.memo()` — 请改为修复根本原因。
* 限制 `useCallback` / `useMemo` 的使用。
```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
* **优先用 `type` 而非 `interface`** — 更灵活、更易组合。
* **优先用字符串字面量而非枚举** — 但 GraphQL 代码生成的枚举和内部库 API 除外。
* **禁止 `any`** — 强制启用严格的 TypeScript。
* **不使用类型导入** — 使用常规导入(由 Oxlint `typescript/consistent-type-imports` 强制执行)。
* **使用 [Zod](https://github.com/colinhacks/zod)** 对无类型对象进行运行时校验。
## JavaScript
```tsx
// Use nullish-coalescing (??) instead of ||
const value = process.env.MY_VALUE ?? 'default';
// Use optional chaining
onClick?.();
```
## 命名
* **变量**:使用 camelCase,具描述性(`email` 而非 `value`,`fieldMetadata` 而非 `fm`)。
* **常量**:SCREAMING_SNAKE_CASE
* **类型/类**:PascalCase
* **文件/目录**:kebab-case(`.component.tsx`、`.service.ts`、`.entity.ts`)
* **事件处理器**:`handleClick`(处理函数不要使用 `onClick` 作为名称)
* **组件 props**:以组件名作为前缀(`ButtonProps`)。
* **样式化组件**:以 `Styled` 作为前缀(`StyledTitle`)。
## 样式
使用 [Linaria](https://github.com/callstack/linaria) 的样式化组件。 使用主题值 — 避免硬编码 `px`、`rem` 或颜色。
```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)};
`;
```
## 导入
使用别名而不是相对路径:
```tsx
// ❌ Bad
import { Foo } from '../../../../../testing/decorators/Foo';
// ✅ Good
import { Foo } from '~/testing/decorators/Foo';
import { Bar } from '@/modules/bar/components/Bar';
```
## 文件夹架构
```
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, ...)
```
* 模块可以相互导入,但 `ui/` 应保持无依赖
* 将模块私有代码放在 `internal/` 子文件夹中
* 组件不超过 300 行,服务不超过 500 行。