# Add a Svelte Project
The code for this example is available on GitHub:
{% github-repository url="https://github.com/nrwl/nx-recipes/tree/main/svelte" /%}
**Supported Features**
Because we are not using a Nx plugin for Svelte, there are a few items we'll have to configure manually. We'll have to configure our own build system. There are no pre-created Svelte-specific code generators. And we'll have to take care of updating any framework dependencies as needed.
{% pill url="/core-features/run-tasks" %}✅ Run Tasks{% /pill %}
{% pill url="/core-features/cache-task-results" %}✅ Cache Task Results{% /pill %}
{% pill url="/core-features/remote-cache" %}✅ Share Your Cache{% /pill %}
{% pill url="/core-features/explore-graph" %}✅ Explore the Graph{% /pill %}
{% pill url="/core-features/distribute-task-execution" %}✅ Distribute Task Execution{% /pill %}
{% pill url="/core-features/integrate-with-editors" %}✅ Integrate with Editors{% /pill %}
{% pill url="/core-features/automate-updating-dependencies" %}✅ Automate Updating Nx{% /pill %}
{% pill url="/core-features/enforce-module-boundaries" %}✅ Enforce Module Boundaries{% /pill %}
{% pill url="/core-features/plugin-features/use-task-executors" %}🚫 Use Task Executors{% /pill %}
{% pill url="/core-features/plugin-features/use-code-generators" %}🚫 Use Code Generators{% /pill %}
{% pill url="/core-features/automate-updating-dependencies" %}🚫 Automate Updating Framework Dependencies{% /pill %}
## Setup workspace
**Create a new Nx workspace**
{% tabs %}
{%tab label="npm"%}
```shell
npx create-nx-workspace@latest workspace --preset=react-monorepo --style=css --bundler=vite --nx-cloud=true --appName=acme
```
{% /tab %}
{%tab label="yarn"%}
```shell
npx create-nx-workspace@latest workspace --preset=react-monorepo --style=css --bundler=vite --nx-cloud=true --appName=acme --pm yarn
```
{% /tab %}
{%tab label="pnpm"%}
```shell
npx create-nx-workspace@latest workspace --preset=react-monorepo --style=css --bundler=vite --nx-cloud=true --appName=acme --pm pnpm
```
{% /tab %}
{% /tabs %}
**Add @nx/vite, svelte, and other dependencies to your workspace**
{% callout type="note" title="Keep Nx Package Versions In Sync" %}
Make sure to install the `@nx/vite` and `@nx/js` versions that matches the version of `nx` in your repository. If the version numbers get out of sync, you can encounter some difficult to debug errors. You can [fix Nx version mismatches with this recipe](/recipes/tips-n-tricks/keep-nx-versions-in-sync).
{% /callout %}
{% tabs %}
{%tab label="npm"%}
```shell
npm install --save-dev @nx/vite @nx/js vitest vite svelte svelte-check @sveltejs/vite-plugin-svelte
```
{% /tab %}
{%tab label="yarn"%}
```shell
yarn add --dev @nx/vite @nx/js vitest vite svelte svelte-check @sveltejs/vite-plugin-svelte
```
{% /tab %}
{%tab label="pnpm"%}
```shell
pnpm add --save-dev @nx/vite @nx/js vitest vite svelte svelte-check @sveltejs/vite-plugin-svelte
```
{% /tab %}
{% /tabs %}
## Create the application
Before we start to create our application, let's remove the React application that was created for us.
```shell
rm -rf apps/acme/src/app/*
```
Update your `apps/acme/src/index.html` to the following:
```html
Acme
```
Navigate to `apps/acme/src/main.tsx` and change it to `apps/acme/src/main.ts` and add the following content:
```ts
import App from './app/App.svelte';
const app = new App({
target: document.getElementById('app'),
});
export default app;
```
Create a new file `apps/acme/src/app/App.svelte` and add the following content:
```ts
```
## Configure Nx to build and serve the application
Navigate to `vite.config.ts` update the file name to `vite.config.mts` and add the following content:
```ts
// Add this to your imports
import { svelte } from '@sveltejs/vite-plugin-svelte';
export default defineConfig({
plugins: [
//...
svelte(),
],
server: {
port: 4200,
host: 'localhost',
},
});
```
{%callout type="Note" title="Why use the .mts file extension?" %}
We change `vite.config.ts` to `vite.config.mts` because `'@sveltejs/vite-plugin-svelte'` is an ESM only package. As a result, we need to use the `.mts` extension to tell Nx to use the ESM loader. See more here: [ESM Package](https://vitejs.dev/guide/troubleshooting.html#this-package-is-esm-only)
{% /callout %}
Update your `tsconfig.app.json` with the following content:
```json {% fileName="/apps/acme/tsconfig.app.json" %}
{
"extends": "./tsconfig.json",
"compilerOptions": {
"moduleResolution": "node",
"target": "esnext",
"ignoreDeprecations": "5.0",
"isolatedModules": true,
"sourceMap": true,
"types": ["svelte", "node", "vite/client"],
"strict": false,
"esModuleInterop": true,
"skipLibCheck": true,
"forceConsistentCasingInFileNames": true,
"checkJs": true
},
"include": [
"src/**/*.d.ts",
"src/**/*.ts",
"src/**/*.js",
"src/**/*.svelte",
"vite.config.mts"
],
"exclude": ["jest.config.ts", "src/**/*.spec.ts", "src/**/*.test.ts"]
}
```
Navigate to `project.json` and update it with the following content:
```json {% fileName="/apps/acme/project.json" %}
{
"targets": {
"build": {
"executor": "@nx/vite:build",
"outputs": ["{options.outputPath}"],
"defaultConfiguration": "production",
"options": {
"outputPath": "dist/apps/acme"
},
"configurations": {
"development": {
"mode": "development"
},
"production": {
"mode": "production"
}
}
},
"serve": {
"executor": "@nx/vite:dev-server",
"defaultConfiguration": "development",
"options": {
"buildTarget": "acme:build"
},
"configurations": {
"development": {
"buildTarget": "acme:build:development",
"hmr": true
},
"production": {
"buildTarget": "acme:build:production",
"hmr": false
}
}
}
}
}
```
We also need to add a `svelte.config.js` file to the project root with the following content:
```js
import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
export default {
// Consult https://svelte.dev/docs#compile-time-svelte-preprocess
// for more information about preprocessors
preprocess: vitePreprocess(),
};
```
Update your `package.json` to include:
```json {% fileName="/package.json" %}
{
"type": "module"
}
```
{% callout "Note" title="Why use the type: module?" %}
We need to add `"type": "module"` to our `package.json` file because we are using ESM only packages. See more here: [ESM Package](https://vitejs.dev/guide/troubleshooting.html#this-package-is-esm-only)
{% /callout %}
Test it out
**Build the application**
```shell
nx build acme
```
Your build artifacts should be in `dist/apps/acme`
**Serve the application**
```shell
nx serve acme
```
Navigate to `http://localhost:4200` and you should see your application.
## Create a library
Instead of having our Counter directly defined in `App.svelte` file, let's create a library that we can import into our application.
{% callout type="note" title="Directory Flag Behavior Changes" %}
The command below uses the `as-provided` directory flag behavior, which is the default in Nx 16.8.0. If you're on an earlier version of Nx or using the `derived` option, omit the `--directory` flag. See the [workspace layout documentation](/deprecated/workspace-layout) for more details.
{% /callout %}
```shell
nx generate @nx/js:library --name=Counter --directory=libs/counter --unitTestRunner=vitest --bundler=vite --importPath=@acme/counter
```
Create the Counter component at `libs/counter/src/lib/Counter.svelte` and copy the contents of your `apps/acme/src/App.svelte` file into it.
Update your `libs/counter/src/lib/index.ts` to export your Counter component.
```ts
export { default as Counter } from './Counter.svelte';
```
{% callout "Note" title="Remember the default keyword"%}
The `default` is import here as due to the aliasing we'll be doing later, we'll need to import the Counter component as `import { Counter } from '@acme/counter'`.
{% /callout %}
Update your project's `/apps/acme/vite.config.mts` to include the following:
```ts
export default defineConfig({
//... other config
resolve: {
alias: {
'@acme/counter': fileURLToPath(
new URL('/libs/counter/src/index.ts', import.meta.url)
),
},
},
});
```
This allows the runtime to resolve the `@acme/counter` import to the correct location.
Finally update your `apps/acme/src/App.svelte` to use the counter component.
```ts
```
Now we can build and serve our application again.
```shell
nx build acme
```
To generate the build artifact at `dist/apps/acme`.
```shell
nx serve acme
```
To serve the application at `http://localhost:4200`.
## More Documentation
A larger example including libraries, test and more is available at [Nx Svelte Example](https://github.com/nrwl/nx-recipes/tree/main/svelte) on GitHub.
- [Nx Vite Plugin](/nx-api/vite)
- [Vite](https://vitejs.dev/)
- [Svelte](https://svelte.dev/)