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React Router

GCP.Website.ReactRouter deploys a React Router v7 app in framework mode to Cloud Run. Alchemy runs your own vite build and serves the app from a Node server.

Install

Section titled “Install”

The build integration ships separately. It only runs at deploy time, so a dev dependency is enough:

Terminal window
pnpm add -D https://pkg.alchemy.run/@alchemy.run/frontend-frameworks/a870ed4

Docker has to be running when you deploy. The image is built on your machine.

Deploy the site

Section titled “Deploy the site”
alchemy.run.ts
import * as Alchemy from "alchemy";
import * as GCP from "@alchemy.run/gcp";
import * as Effect from "effect/Effect";


export const Website = GCP.Website.ReactRouter("Website");


export default Alchemy.Stack(
  "MySite",
  { providers: GCP.providers(), state: GCP.state() },
  Effect.gen(function* () {
    const site = yield* Website;
    return { url: site.url };
  }),
);

Run alchemy deploy. site.url is the Cloud Run service URL.

Pass environment variables

Section titled “Pass environment variables”
alchemy.run.ts
export const Website = GCP.Website.ReactRouter("Website");
export const Website = GCP.Website.ReactRouter("Website", {
  env: {
    GREETING: "Hello from Cloud Run!",
  },
});

Loaders read it from process.env:

app/routes/home.tsx
export function loader() {
  return { greeting: process.env.GREETING ?? "Hello!" };
}

Configure Vite

Section titled “Configure Vite”

Your vite.config.ts needs no adapter. React Server Components are not supported yet: the build fails with a clear error if it emits more than one server entry.

Tune Cloud Run

Section titled “Tune Cloud Run”
export const Website = GCP.Website.ReactRouter("Website", {
  scaling: { minInstanceCount: 1 },
  resources: { limits: { cpu: "1", memory: "1Gi" } },
});

One warm instance means no cold start for the first visitor. See Websites for the other settings.

Local development

Section titled “Local development”

alchemy dev runs the framework’s dev server with hot reload and creates nothing in the cloud. Wrap the site in Alchemy.remote() to deploy it for real during dev.

Where next

Section titled “Where next”