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This is the SST v0.x Constructs doc. SST v1 is now released. If you are using v1, see the v1 Constructs doc. If you are looking to upgrade to v1, check out the migration steps.

The ViteStaticSite construct is a higher level CDK construct that makes it easy to create a Vite single page app. It provides a simple way to build and deploy the site to an S3 bucket; setup a CloudFront CDN for fast content delivery; and configure a custom domain for the website URL.

It's designed to work with static sites built with Vite. It allows you to automatically set environment variables in your Vite app directly from the outputs of your SST app. And it can also create a .d.ts type definition file for the environments.

The ViteStaticSite construct internally extends the StaticSite construct with the following pre-configured defaults.


new ViteStaticSite(scope: Construct, id: string, props: ViteStaticSiteProps)



The ViteStaticSite construct is designed to make it easy to work with static sites built with Vite or similar projects.

Creating a Vite app

Deploys a Vite app in the path/to/src directory.

new ViteStaticSite(this, "Site", {
path: "path/to/src",

Configuring environment variables

The ViteStaticSite construct allows you to set the environment variables in your Vite app based on outputs from other constructs in your SST app. So you don't have to hard code the config from your backend. Let's look at how.

Vite supports setting build time environment variables. In your JS files this looks like:


You can pass these in directly from the construct.

new ViteStaticSite(this, "Site", {
path: "path/to/src",
environment: {
VITE_API_URL: api.url,
VITE_USER_POOL_CLIENT: auth.cognitoUserPoolClient.userPoolClientId,

Where api.url or auth.cognitoUserPoolClient.userPoolClientId are coming from other constructs in your SST app.

Type definitions

SST also creates a type definition file for the environment variables in src/sst-env.d.ts.

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

interface ImportMetaEnv {
readonly VITE_API_URL: string;
readonly VITE_USER_POOL_CLIENT: string;

interface ImportMeta {
readonly env: ImportMetaEnv;

This tells your editor the environment variables that are available and autocompletes them for you.

Vite environment variables autocomplete

You can also override the path for the generated type definitions file.

new ViteStaticSite(this, "Site", {
path: "path/to/src",
environment: {
VITE_API_URL: api.url,
VITE_USER_POOL_CLIENT: auth.cognitoUserPoolClient.userPoolClientId,
typesPath: "types/my-env.d.ts",

While deploying

On sst deploy, the environment variables will first be replaced by placeholder values, {{ VITE_API_URL }} and {{ VITE_USER_POOL_CLIENT }}, when building the Vite app. And after the referenced resources have been created, the Api and User Pool in this case, the placeholders in the HTML and JS files will then be replaced with the actual values.

While developing

To use these values while developing, run sst start to start the Live Lambda Development environment.

npx sst start

Then in your Vite app to reference these variables, add the sst-env package.

npm install --save-dev @serverless-stack/static-site-env

And tweak the Vite dev script to:

"scripts": {
"dev": "sst-env -- vite",
"build": "vite build",
"preview": "vite preview"

Now you can start your Vite app as usualy and it'll have the environment variables from your SST app.

npm run dev

There are a couple of things happening behind the scenes here:

  1. The sst start command generates a file with the values specified by ViteStaticSite's environment prop.
  2. The sst-env CLI will traverse up the directories to look for the root of your SST app.
  3. It'll then find the file that's generated in step 1.
  4. It'll load these as environment variables before running the start command.

sst-env only works if the Vite app is located inside the SST app or inside one of its subdirectories. For example:


Configuring custom domains

You can also configure custom domains for your Vite app. SST supports domains that are shoted either on Route 53 or externally.

Using the basic config for a domain hosted on Route 53.

new ViteStaticSite(this, "Site", {
path: "path/to/src",
customDomain: "",

For more custom domain examples, check out the StaticSite examples.


Refer to the properties in the StaticSite construct.


Takes the following construct props in addition to all the StaticSiteProps.


Type : boolean | string, defaults to src/sst-env.d.ts

Path to where the type definition file will be created.