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initialize playground
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‎package.json

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"prettier": "^2.8.8",
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"prettier-plugin-svelte": "^2.10.0"
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},
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"pnpm": {
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"overrides": {
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"svelte": "workspace:*"
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}
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},
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"packageManager": "[email protected]"
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}

‎packages/playground/.gitignore

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# Logs
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logs
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*.log
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*
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pnpm-debug.log*
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lerna-debug.log*
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node_modules
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dist
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dist-ssr
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*.local
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# Editor directories and files
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.vscode/*
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!.vscode/extensions.json
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.idea
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.DS_Store
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*.suo
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*.ntvs*
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*.njsproj
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*.sln
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*.sw?

‎packages/playground/README.md

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# Svelte + Vite
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This template should help get you started developing with Svelte in Vite.
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## Recommended IDE Setup
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[VS Code](https://code.visualstudio.com/) + [Svelte](https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode).
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## Need an official Svelte framework?
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Check out [SvelteKit](https://github.com/sveltejs/kit#readme), which is also powered by Vite. Deploy anywhere with its serverless-first approach and adapt to various platforms, with out of the box support for TypeScript, SCSS, and Less, and easily-added support for mdsvex, GraphQL, PostCSS, Tailwind CSS, and more.
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## Technical considerations
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**Why use this over SvelteKit?**
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- It brings its own routing solution which might not be preferable for some users.
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- It is first and foremost a framework that just happens to use Vite under the hood, not a Vite app.
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This template contains as little as possible to get started with Vite + Svelte, while taking into account the developer experience with regards to HMR and intellisense. It demonstrates capabilities on par with the other `create-vite` templates and is a good starting point for beginners dipping their toes into a Vite + Svelte project.
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Should you later need the extended capabilities and extensibility provided by SvelteKit, the template has been structured similarly to SvelteKit so that it is easy to migrate.
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**Why `global.d.ts` instead of `compilerOptions.types` inside `jsconfig.json` or `tsconfig.json`?**
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Setting `compilerOptions.types` shuts out all other types not explicitly listed in the configuration. Using triple-slash references keeps the default TypeScript setting of accepting type information from the entire workspace, while also adding `svelte` and `vite/client` type information.
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**Why include `.vscode/extensions.json`?**
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Other templates indirectly recommend extensions via the README, but this file allows VS Code to prompt the user to install the recommended extension upon opening the project.
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**Why enable `checkJs` in the JS template?**
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It is likely that most cases of changing variable types in runtime are likely to be accidental, rather than deliberate. This provides advanced typechecking out of the box. Should you like to take advantage of the dynamically-typed nature of JavaScript, it is trivial to change the configuration.
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**Why is HMR not preserving my local component state?**
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HMR state preservation comes with a number of gotchas! It has been disabled by default in both `svelte-hmr` and `@sveltejs/vite-plugin-svelte` due to its often surprising behavior. You can read the details [here](https://github.com/rixo/svelte-hmr#svelte-hmr).
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If you have state that's important to retain within a component, consider creating an external store which would not be replaced by HMR.
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```js
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// store.js
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// An extremely simple external store
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import { writable } from 'svelte/store'
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export default writable(0)
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```

‎packages/playground/index.html

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<link rel="icon" type="image/svg+xml" href="/vite.svg" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Vite + Svelte</title>
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<!--app-head-->
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</head>
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<body>
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<div id="app"><!--app-html--></div>
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<script type="module" src="/src/entry-client.js"></script>
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</body>
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</html>

‎packages/playground/jsconfig.json

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{
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"compilerOptions": {
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"moduleResolution": "Node",
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"target": "ESNext",
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"module": "ESNext",
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/**
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* svelte-preprocess cannot figure out whether you have
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* a value or a type, so tell TypeScript to enforce using
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* `import type` instead of `import` for Types.
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*/
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"importsNotUsedAsValues": "error",
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"isolatedModules": true,
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"resolveJsonModule": true,
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/**
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* To have warnings / errors of the Svelte compiler at the
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* correct position, enable source maps by default.
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*/
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"sourceMap": true,
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"esModuleInterop": true,
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"skipLibCheck": true,
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"forceConsistentCasingInFileNames": true,
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/**
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* Typecheck JS in `.svelte` and `.js` files by default.
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* Disable this if you'd like to use dynamic types.
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*/
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"checkJs": true
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},
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/**
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* Use global.d.ts instead of compilerOptions.types
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* to avoid limiting type declarations.
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*/
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"include": ["src/**/*.d.ts", "src/**/*.js", "src/**/*.svelte"]
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}

‎packages/playground/package.json

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{
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"name": "playground",
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"private": true,
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"version": "0.0.0",
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"type": "module",
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"scripts": {
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"dev": "node server",
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"build": "npm run build:client && npm run build:server",
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"build:client": "vite build --ssrManifest --outDir dist/client",
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"build:server": "vite build --ssr src/entry-server.js --outDir dist/server",
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"preview": "cross-env NODE_ENV=production node server"
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},
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"dependencies": {
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"compression": "^1.7.4",
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"express": "^4.18.2",
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"sirv": "^2.0.2"
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},
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"devDependencies": {
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"@sveltejs/vite-plugin-svelte": "^2.4.1",
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"cross-env": "^7.0.3",
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"svelte": "^3.54.0",
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"vite": "^4.0.4"
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}
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}

‎packages/playground/public/vite.svg

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‎packages/playground/server.js

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import fs from 'node:fs/promises'
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import express from 'express'
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// Constants
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const isProduction = process.env.NODE_ENV === 'production'
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const port = process.env.PORT || 5173
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const base = process.env.BASE || '/'
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// Cached production assets
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const templateHtml = isProduction
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? await fs.readFile('./dist/client/index.html', 'utf-8')
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: ''
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const ssrManifest = isProduction
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? await fs.readFile('./dist/client/ssr-manifest.json', 'utf-8')
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: undefined
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// Create http server
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const app = express()
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// Add Vite or respective production middlewares
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let vite
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if (!isProduction) {
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const { createServer } = await import('vite')
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vite = await createServer({
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server: { middlewareMode: true },
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appType: 'custom',
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base
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})
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app.use(vite.middlewares)
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} else {
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const compression = (await import('compression')).default
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const sirv = (await import('sirv')).default
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app.use(compression())
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app.use(base, sirv('./dist/client', { extensions: [] }))
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}
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// Serve HTML
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app.use('*', async (req, res) => {
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try {
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const url = req.originalUrl.replace(base, '')
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let template
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let render
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if (!isProduction) {
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// Always read fresh template in development
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template = await fs.readFile('./index.html', 'utf-8')
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template = await vite.transformIndexHtml(url, template)
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render = (await vite.ssrLoadModule('/src/entry-server.js')).render
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} else {
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template = templateHtml
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render = (await import('./dist/server/entry-server.js')).render
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}
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const rendered = await render(url, ssrManifest)
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const html = template
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.replace(`<!--app-head-->`, rendered.head ?? '')
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.replace(`<!--app-html-->`, rendered.html ?? '')
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res.status(200).set({ 'Content-Type': 'text/html' }).end(html)
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} catch (e) {
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vite?.ssrFixStacktrace(e)
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console.log(e.stack)
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res.status(500).end(e.stack)
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}
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})
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// Start http server
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app.listen(port, () => {
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console.log(`Server started at http://localhost:${port}`)
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})

‎packages/playground/src/App.svelte

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<script>
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import svelteLogo from './assets/svelte.svg'
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import Counter from './lib/Counter.svelte'
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</script>
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<main>
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<div>
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<a href="https://vitejs.dev" target="_blank" rel="noreferrer">
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<img src="/vite.svg" class="logo" alt="Vite Logo" />
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</a>
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<a href="https://svelte.dev" target="_blank" rel="noreferrer">
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<img src={svelteLogo} class="logo svelte" alt="Svelte Logo" />
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</a>
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</div>
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<h1>Vite + Svelte</h1>
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<div class="card">
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<Counter />
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</div>
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<p>
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Check out <a href="https://github.com/sveltejs/kit#readme" target="_blank" rel="noreferrer">SvelteKit</a>, the official Svelte app framework powered by Vite!
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</p>
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<p class="read-the-docs">
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Click on the Vite and Svelte logos to learn more
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</p>
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</main>
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<style>
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.logo {
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height: 6em;
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padding: 1.5em;
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will-change: filter;
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}
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.logo:hover {
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filter: drop-shadow(0 0 2em #646cffaa);
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}
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.logo.svelte:hover {
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filter: drop-shadow(0 0 2em #ff3e00aa);
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}
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.read-the-docs {
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color: #888;
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}
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</style>

‎packages/playground/src/app.css

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:root {
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font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
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line-height: 1.5;
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font-weight: 400;
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color-scheme: light dark;
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color: rgba(255, 255, 255, 0.87);
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background-color: #242424;
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font-synthesis: none;
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text-rendering: optimizeLegibility;
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-webkit-font-smoothing: antialiased;
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-moz-osx-font-smoothing: grayscale;
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-webkit-text-size-adjust: 100%;
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}
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a {
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font-weight: 500;
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color: #646cff;
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text-decoration: inherit;
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}
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a:hover {
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color: #535bf2;
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}
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body {
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margin: 0;
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display: flex;
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place-items: center;
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min-width: 320px;
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min-height: 100vh;
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}
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h1 {
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font-size: 3.2em;
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line-height: 1.1;
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}
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.card {
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padding: 2em;
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}
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#app {
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max-width: 1280px;
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margin: 0 auto;
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padding: 2rem;
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text-align: center;
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}
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button {
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border-radius: 8px;
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border: 1px solid transparent;
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padding: 0.6em 1.2em;
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font-size: 1em;
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font-weight: 500;
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font-family: inherit;
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background-color: #1a1a1a;
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cursor: pointer;
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transition: border-color 0.25s;
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}
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button:hover {
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border-color: #646cff;
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}
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button:focus,
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button:focus-visible {
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outline: 4px auto -webkit-focus-ring-color;
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}
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@media (prefers-color-scheme: light) {
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:root {
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color: #213547;
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background-color: #ffffff;
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}
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a:hover {
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color: #747bff;
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}
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button {
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background-color: #f9f9f9;
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}
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}

‎packages/playground/src/assets/svelte.svg

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‎packages/playground/src/entry-client.js

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import './app.css'
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import App from './App.svelte'
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new App({
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target: document.getElementById('app'),
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hydrate: true
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})

‎packages/playground/src/entry-server.js

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import App from './App.svelte'
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export function render() {
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// @ts-ignore
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return App.render()
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}

‎packages/playground/src/lib/Counter.svelte

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<script>
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let count = 0
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const increment = () => {
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count += 1
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}
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</script>
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<button on:click={increment}>
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count is {count}
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</button>

‎packages/playground/src/vite-env.d.ts

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/// <reference types="svelte" />
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/// <reference types="vite/client" />

‎packages/playground/svelte.config.js

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import { vitePreprocess } from '@sveltejs/vite-plugin-svelte'
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export default {
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preprocess: vitePreprocess()
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}

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