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177 lines
4.8 KiB
Plaintext
177 lines
4.8 KiB
Plaintext
---
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title: Guida di stile
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icon: paintbrush
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description: Convenzioni di codice e buone pratiche per contribuire a Twenty.
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---
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## React
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### Solo componenti funzionali
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Usa sempre componenti funzionali TSX con export nominati.
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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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### Props
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Crea un tipo denominato `{ComponentName}Props`. Usa la destrutturazione. Non usare `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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### Niente spread di una singola variabile nelle props
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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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## Gestione dello stato
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### Atomi Jotai per lo stato globale
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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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* Preferisci gli atomi al prop drilling
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* Non usare `useRef` per lo stato — usa `useState` o gli atomi
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* Usa famiglie di atomi e selettori per le liste
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### Evita i re-render inutili
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* Estrai `useEffect` e il recupero dei dati in componenti sidecar fratelli
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* Preferisci i gestori di eventi (`handleClick`, `handleChange`) a `useEffect`
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* Non usare `React.memo()` — risolvi invece la causa principale
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* Limita l'uso di `useCallback` o `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` invece di `interface`** — più flessibile, più facile da comporre
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* **Letterali di stringa invece degli enum** — tranne per gli enum generati da GraphQL codegen e le API interne della libreria
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* **Niente `any`** — TypeScript rigoroso applicato
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* **Niente import di tipo** — usa import normali (applicato da Oxlint `typescript/consistent-type-imports`)
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* **Usa [Zod](https://github.com/colinhacks/zod)** per la validazione a runtime di oggetti non tipizzati
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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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## Denominazione
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* **Variabili**: camelCase, descrittive (`email` non `value`, `fieldMetadata` non `fm`)
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* **Costanti**: SCREAMING_SNAKE_CASE
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* **Tipi/Classi**: PascalCase
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* **File/directory**: kebab-case (`.component.tsx`, `.service.ts`, `.entity.ts`)
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* **Gestori di eventi**: `handleClick` (non `onClick` per la funzione gestore)
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* **Props dei componenti**: metti come prefisso il nome del componente (`ButtonProps`)
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* **Componenti styled**: metti come prefisso `Styled` (`StyledTitle`)
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## Stile
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Usa i componenti styled di [Linaria](https://github.com/callstack/linaria). Usa i valori del tema — evita `px`, `rem` o colori hardcoded.
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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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## Importazioni
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Usa gli alias invece dei percorsi relativi:
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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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## Struttura delle cartelle
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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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* I moduli possono importare da altri moduli, ma `ui/` dovrebbe restare privo di dipendenze
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* Usa le sottocartelle `internal/` per il codice privato del modulo
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* Componenti sotto le 300 righe, servizi sotto le 500 righe
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