facebook · srikrsna · Jan 15, 2026 · Jan 15, 2026 · Jan 16, 2026 · henryqdineen
@@ -0,0 +1,23 @@
+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-*
@@ -0,0 +1 @@
+engine-strict=true
@@ -0,0 +1,38 @@
+# 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 in the current directory
+npx sv create
+
+# create a new project in my-app
+npx sv create my-app
+```
+
+## 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.
@@ -0,0 +1,27 @@
+{
+  "name": "example-sveltekit",
+  "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 ./tsconfig.json",
+    "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch"
+  },
+  "dependencies": {
+    "@stylexjs/stylex": "0.17.5"
+  },
+  "devDependencies": {
+    "@sveltejs/adapter-auto": "^7.0.0",
+    "@sveltejs/kit": "^2.49.1",
+    "@sveltejs/vite-plugin-svelte": "^6.2.1",
+    "svelte": "^5.45.6",
+    "svelte-check": "^4.3.4",
+    "typescript": "^5.9.3",
+    "vite": "^7.2.6",
+    "@stylexjs/unplugin": "0.17.5"
+  }
+}
@@ -0,0 +1,13 @@
+// See https://svelte.dev/docs/kit/types#app.d.ts
+// for information about these interfaces
+declare global {
+  namespace App {
+    // interface Error {}
+    // interface Locals {}
+    // interface PageData {}
+    // interface PageState {}
+    // interface Platform {}
+  }
+}
+
+export {};
@@ -0,0 +1,11 @@
+<!doctype html>
+<html lang="en">
+	<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>
@@ -0,0 +1,24 @@
+import type * as stylex from '@stylexjs/stylex';
+
+/**
+ * Translates stylex.props to fit svelte attributes.
+ * @example
+ *  <div {...attrs(stylex.props(...styles))} />
+ */
+export function attrs({ className, 'data-style-src': dataStyleSrc, style }: ReturnType<typeof stylex.props>) {
+  const result: {class?: string, style?: string, 'data-style-src'?: string} = {};
+  // Convert className to class
+  if (className != null && className !== '') {
+    result.class = className;
+  }
+  // Convert style object to string
+  if (style != null && Object.keys(style).length > 0) {
+    result.style = Object.keys(style)
+      .map((key) => `${key}:${style[key]};`)
+      .join('');
+  }
+  if (dataStyleSrc != null && dataStyleSrc !== '') {
+    result['data-style-src'] = dataStyleSrc;
+  }
+  return result;
+}
@@ -0,0 +1,3 @@
+// place files you want to import through the `$lib` alias in this folder.
+
+export * from "./attrs";
@@ -0,0 +1,19 @@
+<script lang="ts">
+	import favicon from '$lib/assets/favicon.svg';
+	import "../app.css";
+	if (import.meta.env.DEV) {
+		// @ts-expect-error // Virtual modules are not typed
+		$effect(() => import('virtual:stylex:runtime'))
+	}
+
+	let { children } = $props();
+</script>
+
+<svelte:head>
+	<link rel="icon" href={favicon} />
+	{#if import.meta.env.DEV}
+		<link rel="stylesheet" href="/virtual:stylex.css" />
+	{/if}
+</svelte:head>
+
+{@render children()}
@@ -0,0 +1,30 @@
+<script lang="ts" module>
+  import * as stylex from '@stylexjs/stylex';
+  import { attrs } from '$lib';
+
+  const styles = stylex.create({
+    main: {
+      width: '100vw',
+      height: '100vh',
+      display: 'flex',
+      alignItems: 'center',
+      justifyContent: 'center',
+      backgroundColor: 'lightblue',
+    },
+    card: {
+      backgroundColor: '#fefefe',
+      padding: '1rem',
+      borderRadius: 10,
+      justifyContent: 'center',
+      display: 'flex',
+      alignItems: 'center',
+      color: '#333',
+      fontFamily: 'Arial',
+    },
+  });
+</script>
+
+
+<div {...attrs(stylex.props(styles.main))}>
+  <div {...attrs(stylex.props(styles.card))}>Content</div>
+</div>
@@ -0,0 +1,3 @@
+# allow crawling everything by default
+User-agent: *
+Disallow:
@@ -0,0 +1,24 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+import adapter from '@sveltejs/adapter-auto';
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+  // Consult https://svelte.dev/docs/kit/integrations
+  // for more information about preprocessors
+  preprocess: vitePreprocess(),
+
+  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(),
+  },
+};
+
+export default config;
@@ -0,0 +1,20 @@
+{
+	"extends": "./.svelte-kit/tsconfig.json",
+	"compilerOptions": {
+		"rewriteRelativeImportExtensions": true,
+		"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 $lib which is handled by https://svelte.dev/docs/kit/configuration#files
+	//
+	// To make changes to top-level options such as include and exclude, we recommend extending
+	// the generated config; see https://svelte.dev/docs/kit/configuration#typescript
+}
@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+import stylex from '@stylexjs/unplugin';
+
+export default defineConfig({
+  plugins: [
+    sveltekit(),
+    // @ts-expect-error - ignore for now
+    {
+      ...stylex.vite({
+        useCSSLayers: true,
+        enableFontSizePxToRem: true,
+      }),
+      enforce: undefined,
+    },
+  ],
+});
@@ -425,7 +425,7 @@ const unpluginInstance = createUnplugin((userOptions = {}, metaOptions) => {
     // Core code transform
     async transform(code, id) {
       // Only handle JS-like files; avoid parsing CSS/JSON/etc
-      const JS_LIKE_RE = /\.[cm]?[jt]sx?(\?|$)/;
+      const JS_LIKE_RE = /\.([cm]?[jt]sx?|svelte)(\?|$)/;
       if (!JS_LIKE_RE.test(id)) return null;
       if (!shouldHandle(code)) return null;
 

@@ -4,6 +4,7 @@
       "./vite-react.mdx",
       "./vite-rsc.mdx",
       "./react-router.mdx",
+      "./sveltekit.mdx",
       "./redwoodsdk.mdx",
       "./waku.mdx"
   ]

@@ -0,0 +1,57 @@
+---
+title: 'SvelteKit'
+---
+
+[`examples/example-sveltekit`](https://github.com/facebook/stylex/tree/main/examples/example-sveltekit)
+uses SvelteKit with StyleX compiled by `@stylexjs/unplugin`.
+
+## Vite configuration
+
+```ts title="vite.config.ts"
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+import stylex from '@stylexjs/unplugin';
+
+export default defineConfig({
+  plugins: [
+    sveltekit(),
+    {
+      ...stylex.vite({
+        useCSSLayers: true,
+      }),
+      enforce: undefined,
+    },
+  ],
+});
+```
+
+## CSS entrypoint
+
+Ensure that there is one CSS file that is imported from your root layout
+component.
+
+## CSS Link and Hot Reloading during development
+
+Ensure that the virtual CSS file and script for hot reloading styles are part of
+your bundle to enable hot reloading during development.
+
+In your root `+layout.svelte` file, add the following to the script tag and `<svelte:head>`:
+
+```svelte title="src/routes/+layout.svelte"
+<script>
+  import "../app.css";
+  if (import.meta.env.DEV) {
+    $effect(() => import('virtual:stylex:runtime'))
+  }
+
+  let { children } = $props();
+</script>
+
+<svelte:head>
+  {#if import.meta.env.DEV}
+    <link rel="stylesheet" href="/virtual:stylex.css" />
+  {/if}
+</svelte:head>
+
+{@render children()}
+```
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		@@ -0,0 +1,3 @@
		// place files you want to import through the `$lib` alias in this folder.

		export * from "./attrs";