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177 lines
5.0 KiB
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177 lines
5.0 KiB
Plaintext
---
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title: Stylová příručka
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icon: paintbrush
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description: Konvence kódu a osvědčené postupy pro přispívání do Twenty.
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---
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## React
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### Pouze funkcionální komponenty
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Vždy používejte funkcionální komponenty TSX s pojmenovanými exporty.
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```tsx
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// ❌ Bad
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const MyComponent = () => {
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return <div>Hello World</div>;
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};
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export default MyComponent;
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// ✅ Good
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export function MyComponent() {
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return <div>Hello World</div>;
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};
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```
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### Vlastnosti
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Vytvořte typ s názvem `{ComponentName}Props`. Používejte destrukturalizaci. Nepoužívejte `React.FC`.
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```tsx
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type MyComponentProps = {
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name: string;
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};
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export const MyComponent = ({ name }: MyComponentProps) => <div>Hello {name}</div>;
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```
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### Nepoužívejte prop spreading jediné proměnné
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```tsx
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// ❌ Bad
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const MyComponent = (props: MyComponentProps) => <Other {...props} />;
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// ✅ Good
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const MyComponent = ({ prop1, prop2 }: MyComponentProps) => <Other {...{ prop1, prop2 }} />;
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```
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## Správa stavu
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### Atomy Jotai pro globální stav
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```tsx
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import { createAtomState } from '@/ui/utilities/state/jotai/utils/createAtomState';
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import { useAtomState } from '@/ui/utilities/state/jotai/hooks/useAtomState';
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export const myAtomState = createAtomState<string>({
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key: 'myAtomState',
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defaultValue: 'default value',
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});
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```
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* Upřednostňujte atomy před prop drillingem
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* Nepoužívejte `useRef` pro stav — použijte `useState` nebo atomy
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* Používejte rodiny atomů a selektory pro seznamy
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### Vyhněte se zbytečnému opakovanému vykreslování
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* Přesuňte `useEffect` a načítání dat do sesterských sidecar komponent
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* Upřednostňujte obslužné funkce událostí (`handleClick`, `handleChange`) před `useEffect`
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* Nepoužívejte `React.memo()` — místo toho opravte kořenovou příčinu
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* Omezte používání `useCallback` / `useMemo`
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```tsx
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// ❌ Bad — useEffect in the same component causes re-renders
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export const Page = () => {
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const [data, setData] = useAtomState(dataState);
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const [dep] = useAtomState(depState);
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useEffect(() => { setData(dep); }, [dep]);
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return <div>{data}</div>;
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};
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// ✅ Good — extract into sibling
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export const PageData = () => {
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const [data, setData] = useAtomState(dataState);
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const [dep] = useAtomState(depState);
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useEffect(() => { setData(dep); }, [dep]);
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return <></>;
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};
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export const Page = () => {
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const [data] = useAtomState(dataState);
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return <div>{data}</div>;
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};
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```
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## TypeScript
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* **`type` místo `interface`** — flexibilnější, lépe kombinovatelný
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* **Řetězcové literály místo výčtů** — s výjimkou enumů GraphQL codegenu a interních API knihoven
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* **Žádné `any`** — vynucený přísný TypeScript
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* **Žádné importy typů** — používejte běžné importy (vynuceno nástrojem Oxlint `typescript/consistent-type-imports`)
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* **Používejte [Zod](https://github.com/colinhacks/zod)** pro runtime validaci netypovaných objektů
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## JavaScript
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```tsx
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// Use nullish-coalescing (??) instead of ||
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const value = process.env.MY_VALUE ?? 'default';
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// Use optional chaining
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onClick?.();
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```
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## Pojmenovávání
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* **Proměnné**: camelCase, popisné (`email` nikoli `value`, `fieldMetadata` nikoli `fm`)
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* **Konstanty**: SCREAMING_SNAKE_CASE
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* **Typy/Třídy**: PascalCase
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* **Soubory/adresáře**: kebab-case (`.component.tsx`, `.service.ts`, `.entity.ts`)
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* **Obslužné funkce událostí**: `handleClick` (nikoli `onClick` pro obslužnou funkci)
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* **Vlastnosti komponenty (props)**: předponu tvoří název komponenty (`ButtonProps`)
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* **Stylované komponenty**: předpona `Styled` (`StyledTitle`)
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## Styling
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Používejte stylované komponenty [Linaria](https://github.com/callstack/linaria). Používejte hodnoty z tématu — vyhněte se napevno zadaným `px`, `rem` nebo barvám.
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```tsx
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// ❌ Bad
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const StyledButton = styled.button`
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color: #333333;
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font-size: 1rem;
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margin-left: 4px;
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`;
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// ✅ Good
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const StyledButton = styled.button`
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color: ${({ theme }) => theme.font.color.primary};
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font-size: ${({ theme }) => theme.font.size.md};
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margin-left: ${({ theme }) => theme.spacing(1)};
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`;
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```
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## Importy
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Používejte aliasy místo relativních cest:
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```tsx
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// ❌ Bad
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import { Foo } from '../../../../../testing/decorators/Foo';
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// ✅ Good
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import { Foo } from '~/testing/decorators/Foo';
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import { Bar } from '@/modules/bar/components/Bar';
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```
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## Struktura složek
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```
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front
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└── modules/ # Feature modules
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│ └── module1/
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│ ├── components/
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│ ├── constants/
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│ ├── contexts/
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│ ├── graphql/ (fragments, queries, mutations)
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│ ├── hooks/
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│ ├── states/ (atoms, selectors)
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│ ├── types/
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│ └── utils/
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└── pages/ # Route-level components
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└── ui/ # Reusable UI components (display, input, feedback, ...)
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```
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* Moduly mohou importovat z jiných modulů, ale `ui/` by mělo zůstat bez závislostí
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* Používejte podadresáře `internal/` pro interní kód modulu
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* Komponenty do 300 řádků, služby do 500 řádků
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