38 lines
1.8 KiB
Markdown
38 lines
1.8 KiB
Markdown
# Frontend
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Svelte 5 SPA bundled with esbuild and styled with Tailwind CSS 4.
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## Structure
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- Entry point: `src/index.ts`, main component: `src/App.svelte`.
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- `src/lib/` — utilities, stores, actions, API layer.
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- `src/widgets/` — reusable UI components (Button, Input, Form, etc.).
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- `src/css/` — global styles and Tailwind imports.
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- Keep route components in a `src/routes/` folder when needed.
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## Conventions
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- PascalCase component names; export props at the top of `<script>` tag.
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- Keep code and comments in English.
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- SSR safety: guard browser-only code with `typeof window !== "undefined"`.
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- API behavior: PUT responses return only changed fields; filter by id uses `_id`; API requests reject non-2xx with `{ response, data }` and error payload in `error.data.error`.
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## Tailwind CSS
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- Always use canonical Tailwind utility classes instead of arbitrary values when a standard equivalent exists (e.g. `h-16.5` not `h-[66px]`, `min-h-3` not `min-h-[12px]`).
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- Only use arbitrary values (`[...]`) when no standard utility covers the needed value.
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## i18n
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- `svelte-i18n` is configured in `src/lib/i18n/index.ts` with lazy loading for locale files.
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- Locale files live in `src/lib/i18n/locales/{lang}.json`.
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- URL-based language routing: `/{lang}/...` (e.g. `/de/`, `/en/about`).
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- Language utilities in `src/lib/i18n.ts`: `extractLanguageFromPath()`, `localizedPath()`, `getLanguageSwitchUrl()`.
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- Use `$_("key")` from `svelte-i18n` for translations in components.
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## Related tests
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- When developing frontend features: extend or create corresponding E2E tests in `tests/e2e/`.
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- After frontend changes, run only the affected E2E tests: `npx playwright test tests/e2e/filename.spec.ts` or `-g "test name"`.
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- When tests fail, clarify whether the frontend or the test needs adjustment — coordinate with the user.
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