初始化项目

web/.env.example

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+# Drizzle
+DATABASE_URL=local.db
+
+ORIGIN=""
+
+# Better Auth
+# For production use 32 characters and generated with high entropy
+# https://www.better-auth.com/docs/installation
+BETTER_AUTH_SECRET=""

web/.gitignore

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+node_modules
+
+# Output
+.output
+.vercel
+.netlify
+.wrangler
+/.svelte-kit
+/build
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Env
+.env
+.env.*
+!.env.example
+!.env.test
+
+# Vite
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*
+# Paraglide
+src/lib/paraglide
+project.inlang/cache/
+# SQLite
+*.db

web/.npmrc

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+engine-strict=true

web/.prettierignore

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+# Package Managers
+package-lock.json
+pnpm-lock.yaml
+yarn.lock
+bun.lock
+bun.lockb
+
+# Miscellaneous
+/static/
+/drizzle/

web/.prettierrc

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+{
+	"useTabs": true,
+	"singleQuote": true,
+	"trailingComma": "none",
+	"printWidth": 100,
+	"plugins": ["prettier-plugin-svelte"],
+	"overrides": [
+		{
+			"files": "*.svelte",
+			"options": {
+				"parser": "svelte"
+			}
+		}
+	]
+}

web/.vscode/extensions.json

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+{
+	"recommendations": ["svelte.svelte-vscode", "esbenp.prettier-vscode", "dbaeumer.vscode-eslint"]
+}

web/README.md

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+# sv
+
+Everything you need to build a Svelte project, powered by [`sv`](https://github.com/sveltejs/cli).
+
+## Creating a project
+
+If you're seeing this, you've probably already done this step. Congrats!
+
+```sh
+# create a new project
+npx sv create my-app
+```
+
+To recreate this project with the same configuration:
+
+```sh
+# recreate this project
+pnpm dlx sv@0.12.6 create --template minimal --types jsdoc --add prettier vitest="usages:unit,component" eslint sveltekit-adapter="adapter:auto" devtools-json better-auth="demo:password" mdsvex paraglide="languageTags:en, zh+demo:yes" drizzle="database:sqlite+sqlite:better-sqlite3" --install pnpm web/
+```
+
+## Developing
+
+Once you've created a project and installed dependencies with `npm install` (or `pnpm install` or `yarn`), start a development server:
+
+```sh
+npm run dev
+
+# or start the server and open the app in a new browser tab
+npm run dev -- --open
+```
+
+## Building
+
+To create a production version of your app:
+
+```sh
+npm run build
+```
+
+You can preview the production build with `npm run preview`.
+
+> To deploy your app, you may need to install an [adapter](https://svelte.dev/docs/kit/adapters) for your target environment.

web/drizzle.config.js

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+import { defineConfig } from 'drizzle-kit';
+
+if (!process.env.DATABASE_URL) throw new Error('DATABASE_URL is not set');
+
+export default defineConfig({
+	schema: './src/lib/server/db/schema.js',
+	dialect: 'sqlite',
+	dbCredentials: { url: process.env.DATABASE_URL },
+	verbose: true,
+	strict: true
+});

web/eslint.config.js

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+import prettier from 'eslint-config-prettier';
+import path from 'node:path';
+import { includeIgnoreFile } from '@eslint/compat';
+import js from '@eslint/js';
+import svelte from 'eslint-plugin-svelte';
+import { defineConfig } from 'eslint/config';
+import globals from 'globals';
+import svelteConfig from './svelte.config.js';
+
+const gitignorePath = path.resolve(import.meta.dirname, '.gitignore');
+
+export default defineConfig(
+	[
+		includeIgnoreFile(gitignorePath),
+		js.configs.recommended,
+		svelte.configs.recommended,
+		{
+			languageOptions: { globals: { ...globals.browser, ...globals.node } }
+		},
+
+		{
+			files: ['**/*.svelte', '**/*.svelte.js'],
+			languageOptions: { parserOptions: { svelteConfig } }
+		}
+	],
+	prettier,
+	svelte.configs.prettier
+);

web/jsconfig.json

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+{
+	"extends": "./.svelte-kit/tsconfig.json",
+	"compilerOptions": {
+		"allowJs": true,
+		"checkJs": true,
+		"esModuleInterop": true,
+		"forceConsistentCasingInFileNames": true,
+		"resolveJsonModule": true,
+		"skipLibCheck": true,
+		"sourceMap": true,
+		"strict": true,
+		"moduleResolution": "bundler"
+	}
+	// Path aliases are handled by https://svelte.dev/docs/kit/configuration#alias
+	// except $lib which is handled by https://svelte.dev/docs/kit/configuration#files
+	//
+	// If you want to overwrite includes/excludes, make sure to copy over the relevant includes/excludes
+	// from the referenced tsconfig.json - TypeScript does not merge them in
+}

web/messages/en.json

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+{
+	"$schema": "https://inlang.com/schema/inlang-message-format",
+	"hello_world": "Hello, {name} from en!"
+}

web/messages/zh.json

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+{
+	"$schema": "https://inlang.com/schema/inlang-message-format",
+	"hello_world": "Hello, {name} from zh!"
+}

web/package.json

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+{
+	"name": "web",
+	"private": true,
+	"version": "0.0.1",
+	"type": "module",
+	"scripts": {
+		"dev": "vite dev",
+		"build": "vite build",
+		"preview": "vite preview",
+		"prepare": "svelte-kit sync || echo ''",
+		"check": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json",
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json --watch",
+		"lint": "prettier --check . && eslint .",
+		"format": "prettier --write .",
+		"test:unit": "vitest",
+		"test": "npm run test:unit -- --run",
+		"auth:schema": "better-auth generate --config src/lib/server/auth.js --output src/lib/server/db/auth.schema.js --yes"
+	},
+	"devDependencies": {
+		"@better-auth/cli": "~1.4.21",
+		"@eslint/compat": "^2.0.2",
+		"@eslint/js": "^9.39.2",
+		"@inlang/paraglide-js": "^2.10.0",
+		"@sveltejs/adapter-auto": "^7.0.0",
+		"@sveltejs/kit": "^2.50.2",
+		"@sveltejs/vite-plugin-svelte": "^6.2.4",
+		"@types/better-sqlite3": "^7.6.13",
+		"@types/node": "^22",
+		"@vitest/browser-playwright": "^4.0.18",
+		"better-auth": "~1.4.21",
+		"eslint": "^9.39.2",
+		"eslint-config-prettier": "^10.1.8",
+		"eslint-plugin-svelte": "^3.14.0",
+		"globals": "^17.3.0",
+		"mdsvex": "^0.12.6",
+		"playwright": "^1.58.2",
+		"prettier": "^3.8.1",
+		"prettier-plugin-svelte": "^3.4.1",
+		"svelte": "^5.51.0",
+		"svelte-check": "^4.4.2",
+		"typescript": "^5.9.3",
+		"vite": "^7.3.1",
+		"vite-plugin-devtools-json": "^1.0.0",
+		"vitest": "^4.0.18",
+		"vitest-browser-svelte": "^2.0.2"
+	},
+	"dependencies": {
+	}
+}

web/pnpm-workspace.yaml

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+onlyBuiltDependencies:
+  - esbuild

web/project.inlang/settings.json

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+{
+	"$schema": "https://inlang.com/schema/project-settings",
+	"modules": [
+		"https://cdn.jsdelivr.net/npm/@inlang/plugin-message-format@4/dist/index.js",
+		"https://cdn.jsdelivr.net/npm/@inlang/plugin-m-function-matcher@2/dist/index.js"
+	],
+	"plugin.inlang.messageFormat": {
+		"pathPattern": "./messages/{locale}.json"
+	},
+	"baseLocale": "en",
+	"locales": ["en", "zh"]
+}

web/src/app.d.ts

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+import type { User, Session } from 'better-auth/minimal';
+
+// See https://svelte.dev/docs/kit/types#app.d.ts
+// for information about these interfaces
+declare global {
+	namespace App {
+		interface Locals {
+			user?: User;
+			session?: Session;
+		}
+
+		// interface Error {}
+		// interface PageData {}
+		// interface PageState {}
+		// interface Platform {}
+	}
+}
+
+export {};

web/src/app.html

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+<!doctype html>
+
+<html lang="%paraglide.lang%" dir="%paraglide.dir%">
+	<head>
+		<meta charset="utf-8" />
+
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+
+		%sveltekit.head%
+	</head>
+
+	<body data-sveltekit-preload-data="hover">
+		<div style="display: contents">%sveltekit.body%</div>
+	</body>
+</html>

web/src/hooks.js

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+import { deLocalizeUrl } from '$lib/paraglide/runtime';
+
+export const reroute = (request) => deLocalizeUrl(request.url).pathname;

web/src/hooks.server.js

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+import { sequence } from '@sveltejs/kit/hooks';
+import { building } from '$app/environment';
+import { auth } from '$lib/server/auth';
+import { svelteKitHandler } from 'better-auth/svelte-kit';
+import { getTextDirection } from '$lib/paraglide/runtime';
+import { paraglideMiddleware } from '$lib/paraglide/server';
+
+/** @type {import('@sveltejs/kit').Handle} */ const handleParaglide = ({ event, resolve }) =>
+	paraglideMiddleware(event.request, ({ request, locale }) => {
+		event.request = request;
+
+		return resolve(event, {
+			transformPageChunk: ({ html }) =>
+				html
+					.replace('%paraglide.lang%', locale)
+					.replace('%paraglide.dir%', getTextDirection(locale))
+		});
+	});
+
+/** @type {import('@sveltejs/kit').Handle} */ const handleBetterAuth = async ({
+	event,
+	resolve
+}) => {
+	const session = await auth.api.getSession({
+		/** @type {import('@sveltejs/kit').Handle} */ headers: event.request.headers
+	});
+
+	if (session) {
+		event.locals.session = session.session;
+		event.locals.user = session.user;
+	}
+
+	return svelteKitHandler({ event, resolve, auth, building });
+};
+
+export /** @type {import('@sveltejs/kit').Handle} */ const handle = sequence(
+	handleParaglide,
+	handleBetterAuth
+);
+/** @type {import('@sveltejs/kit').Handle} */

web/src/lib/assets/favicon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="107" height="128" viewBox="0 0 107 128"><title>svelte-logo</title><path d="M94.157 22.819c-10.4-14.885-30.94-19.297-45.792-9.835L22.282 29.608A29.92 29.92 0 0 0 8.764 49.65a31.5 31.5 0 0 0 3.108 20.231 30 30 0 0 0-4.477 11.183 31.9 31.9 0 0 0 5.448 24.116c10.402 14.887 30.942 19.297 45.791 9.835l26.083-16.624A29.92 29.92 0 0 0 98.235 78.35a31.53 31.53 0 0 0-3.105-20.232 30 30 0 0 0 4.474-11.182 31.88 31.88 0 0 0-5.447-24.116" style="fill:#ff3e00"/><path d="M45.817 106.582a20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.503 18 18 0 0 1 .624-2.435l.49-1.498 1.337.981a33.6 33.6 0 0 0 10.203 5.098l.97.294-.09.968a5.85 5.85 0 0 0 1.052 3.878 6.24 6.24 0 0 0 6.695 2.485 5.8 5.8 0 0 0 1.603-.704L69.27 76.28a5.43 5.43 0 0 0 2.45-3.631 5.8 5.8 0 0 0-.987-4.371 6.24 6.24 0 0 0-6.698-2.487 5.7 5.7 0 0 0-1.6.704l-9.953 6.345a19 19 0 0 1-5.296 2.326 20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.502 17.99 17.99 0 0 1 8.13-12.052l26.081-16.623a19 19 0 0 1 5.3-2.329 20.72 20.72 0 0 1 22.237 8.243 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-.624 2.435l-.49 1.498-1.337-.98a33.6 33.6 0 0 0-10.203-5.1l-.97-.294.09-.968a5.86 5.86 0 0 0-1.052-3.878 6.24 6.24 0 0 0-6.696-2.485 5.8 5.8 0 0 0-1.602.704L37.73 51.72a5.42 5.42 0 0 0-2.449 3.63 5.79 5.79 0 0 0 .986 4.372 6.24 6.24 0 0 0 6.698 2.486 5.8 5.8 0 0 0 1.602-.704l9.952-6.342a19 19 0 0 1 5.295-2.328 20.72 20.72 0 0 1 22.237 8.242 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-8.13 12.053l-26.081 16.622a19 19 0 0 1-5.3 2.328" style="fill:#fff"/></svg>

web/src/lib/index.js

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+// place files you want to import through the `$lib` alias in this folder.

web/src/lib/server/auth.js

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+import { betterAuth } from 'better-auth/minimal';
+import { drizzleAdapter } from 'better-auth/adapters/drizzle';
+import { sveltekitCookies } from 'better-auth/svelte-kit';
+import { env } from '$env/dynamic/private';
+import { getRequestEvent } from '$app/server';
+
+export const auth = betterAuth({
+	baseURL: env.ORIGIN,
+	secret: env.BETTER_AUTH_SECRET,
+//	database: drizzleAdapter(db, { provider: 'sqlite' }),
+	emailAndPassword: { enabled: true },
+	plugins: [sveltekitCookies(getRequestEvent)] // make sure this is the last plugin in the array
+});

web/src/lib/server/db/auth.schema.js

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+// If you see this file, you have not run the auth:schema script yet, but you should!

web/src/lib/server/db/index.js

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+import { drizzle } from 'drizzle-orm/better-sqlite3';
+import Database from 'better-sqlite3';
+import * as schema from './schema';
+import { env } from '$env/dynamic/private';
+
+if (!env.DATABASE_URL) throw new Error('DATABASE_URL is not set');
+
+const client = new Database(env.DATABASE_URL);
+
+export const db = drizzle(client, { schema });

web/src/lib/server/db/schema.js

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+import { integer, sqliteTable, text } from 'drizzle-orm/sqlite-core';
+
+export const task = sqliteTable('task', {
+	id: text('id')
+		.primaryKey()
+		.$defaultFn(() => crypto.randomUUID()),
+	title: text('title').notNull(),
+	priority: integer('priority').notNull().default(1)
+});
+
+export * from './auth.schema';

web/src/lib/vitest-examples/Welcome.svelte

@@ -0,0 +1,8 @@
+<script>
+	import { greet } from './greet';
+
+	let { host = 'SvelteKit', guest = 'Vitest' } = $props();
+</script>
+
+<h1>{greet(host)}</h1>
+<p>{greet(guest)}</p>

web/src/lib/vitest-examples/Welcome.svelte.spec.js

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+import { page } from 'vitest/browser';
+import { describe, expect, it } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import Welcome from './Welcome.svelte';
+
+describe('Welcome.svelte', () => {
+	it('renders greetings for host and guest', async () => {
+		render(Welcome, { host: 'SvelteKit', guest: 'Vitest' });
+
+		await expect
+			.element(page.getByRole('heading', { level: 1 }))
+			.toHaveTextContent('Hello, SvelteKit!');
+		await expect.element(page.getByText('Hello, Vitest!')).toBeInTheDocument();
+	});
+});

web/src/lib/vitest-examples/greet.js

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+export function greet(name) {
+	return 'Hello, ' + name + '!';
+}

web/src/lib/vitest-examples/greet.spec.js

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+import { describe, it, expect } from 'vitest';
+import { greet } from './greet';
+
+describe('greet', () => {
+	it('returns a greeting', () => {
+		expect(greet('Svelte')).toBe('Hello, Svelte!');
+	});
+});

web/src/routes/+layout.svelte

@@ -0,0 +1,16 @@
+<script>
+	import { page } from '$app/state';
+	import { locales, localizeHref } from '$lib/paraglide/runtime';
+	import favicon from '$lib/assets/favicon.svg';
+
+	let { children } = $props();
+</script>
+
+<svelte:head><link rel="icon" href={favicon} /></svelte:head>
+{@render children()}
+
+<div style="display:none">
+	{#each locales as locale}
+		<a href={localizeHref(page.url.pathname, { locale })}>{locale}</a>
+	{/each}
+</div>

web/src/routes/+page.svelte

@@ -0,0 +1,2 @@
+<h1>Welcome to SvelteKit</h1>
+<p>Visit <a href="https://svelte.dev/docs/kit">svelte.dev/docs/kit</a> to read the documentation</p>

web/src/routes/demo/+page.svelte

@@ -0,0 +1,6 @@
+<script>
+	import { resolve } from '$app/paths';
+</script>
+
+<a href={resolve('/demo/better-auth')}>better-auth</a>
+<a href={resolve('/demo/paraglide')}>paraglide</a>

web/src/routes/demo/better-auth/+page.server.js

@@ -0,0 +1,19 @@
+import { redirect } from '@sveltejs/kit';
+
+import { auth } from '$lib/server/auth';
+
+export const load = async (event) => {
+	if (!event.locals.user) {
+		return redirect(302, '/demo/better-auth/login');
+	}
+	return { user: event.locals.user };
+};
+
+export const actions = {
+	signOut: async (event) => {
+		await auth.api.signOut({
+			headers: event.request.headers
+		});
+		return redirect(302, '/demo/better-auth/login');
+	}
+};

web/src/routes/demo/better-auth/+page.svelte

@@ -0,0 +1,11 @@
+<script>
+	import { enhance } from '$app/forms';
+
+	let { data } = $props();
+</script>
+
+<h1>Hi, {data.user.name}!</h1>
+<p>Your user ID is {data.user.id}.</p>
+<form method="post" action="?/signOut" use:enhance>
+	<button>Sign out</button>
+</form>

web/src/routes/demo/better-auth/login/+page.server.js

@@ -0,0 +1,60 @@
+import { fail, redirect } from '@sveltejs/kit';
+
+import { auth } from '$lib/server/auth';
+import { APIError } from 'better-auth/api';
+
+export const load = async (event) => {
+	if (event.locals.user) {
+		return redirect(302, '/demo/better-auth');
+	}
+	return {};
+};
+
+export const actions = {
+	signInEmail: async (event) => {
+		const formData = await event.request.formData();
+		const email = formData.get('email')?.toString() ?? '';
+		const password = formData.get('password')?.toString() ?? '';
+
+		try {
+			await auth.api.signInEmail({
+				body: {
+					email,
+					password,
+					callbackURL: '/auth/verification-success'
+				}
+			});
+		} catch (error) {
+			if (error instanceof APIError) {
+				return fail(400, { message: error.message || 'Signin failed' });
+			}
+			return fail(500, { message: 'Unexpected error' });
+		}
+
+		return redirect(302, '/demo/better-auth');
+	},
+	signUpEmail: async (event) => {
+		const formData = await event.request.formData();
+		const email = formData.get('email')?.toString() ?? '';
+		const password = formData.get('password')?.toString() ?? '';
+		const name = formData.get('name')?.toString() ?? '';
+
+		try {
+			await auth.api.signUpEmail({
+				body: {
+					email,
+					password,
+					name,
+					callbackURL: '/auth/verification-success'
+				}
+			});
+		} catch (error) {
+			if (error instanceof APIError) {
+				return fail(400, { message: error.message || 'Registration failed' });
+			}
+			return fail(500, { message: 'Unexpected error' });
+		}
+
+		return redirect(302, '/demo/better-auth');
+	}
+};

web/src/routes/demo/better-auth/login/+page.svelte

@@ -0,0 +1,24 @@
+<script>
+	import { enhance } from '$app/forms';
+
+	let { form } = $props();
+</script>
+
+<h1>Login</h1>
+<form method="post" action="?/signInEmail" use:enhance>
+	<label>
+		Email
+		<input type="email" name="email" />
+	</label>
+	<label>
+		Password
+		<input type="password" name="password" />
+	</label>
+	<label>
+		Name (for registration)
+		<input name="name" />
+	</label>
+	<button>Login</button>
+	<button formaction="?/signUpEmail">Register</button>
+</form>
+<p style="color: red">{form?.message ?? ''}</p>

web/src/routes/demo/paraglide/+page.svelte

@@ -0,0 +1,22 @@
+<script>
+	import { setLocale } from '$lib/paraglide/runtime';
+	import { m } from '$lib/paraglide/messages.js';
+</script>
+
+<h1>{m.hello_world({ name: 'SvelteKit User' })}</h1>
+
+<div>
+	<button onclick={() => setLocale('en')}>en</button>
+	<button onclick={() => setLocale('zh')}>zh</button>
+</div>
+
+<p>
+	If you use VSCode, install the
+
+	<a
+		href="https://marketplace.visualstudio.com/items?itemName=inlang.vs-code-extension"
+		target="_blank">Sherlock i18n extension</a
+	>
+
+	for a better i18n experience.
+</p>

web/static/robots.txt

@@ -0,0 +1,3 @@
+# allow crawling everything by default
+User-agent: *
+Disallow:

web/svelte.config.js

@@ -0,0 +1,19 @@
+import { mdsvex } from 'mdsvex';
+import adapter from '@sveltejs/adapter-auto';
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+	kit: {
+		// adapter-auto only supports some environments, see https://svelte.dev/docs/kit/adapter-auto for a list.
+		// If your environment is not supported, or you settled on a specific environment, switch out the adapter.
+		// See https://svelte.dev/docs/kit/adapters for more information about adapters.
+		adapter: adapter()
+	},
+	vitePlugin: {
+		dynamicCompileOptions: ({ filename }) => ({ runes: !filename.includes('node_modules') })
+	},
+	preprocess: [mdsvex()],
+	extensions: ['.svelte', '.svx']
+};
+
+export default config;

web/vite.config.js

@@ -0,0 +1,41 @@
+import { paraglideVitePlugin } from '@inlang/paraglide-js';
+import devtoolsJson from 'vite-plugin-devtools-json';
+import { defineConfig } from 'vitest/config';
+import { playwright } from '@vitest/browser-playwright';
+import { sveltekit } from '@sveltejs/kit/vite';
+
+export default defineConfig({
+	plugins: [
+		sveltekit(),
+		devtoolsJson(),
+		paraglideVitePlugin({ project: './project.inlang', outdir: './src/lib/paraglide' })
+	],
+	test: {
+		expect: { requireAssertions: true },
+		projects: [
+			{
+				extends: './vite.config.js',
+				test: {
+					name: 'client',
+					browser: {
+						enabled: true,
+						provider: playwright(),
+						instances: [{ browser: 'chromium', headless: true }]
+					},
+					include: ['src/**/*.svelte.{test,spec}.{js,ts}'],
+					exclude: ['src/lib/server/**']
+				}
+			},
+
+			{
+				extends: './vite.config.js',
+				test: {
+					name: 'server',
+					environment: 'node',
+					include: ['src/**/*.{test,spec}.{js,ts}'],
+					exclude: ['src/**/*.svelte.{test,spec}.{js,ts}']
+				}
+			}
+		]
+	}
+});