@astrojs/cloudflare

An SSR adapter for use with Cloudflare Pages Functions targets. Write your code in Astro/Node and deploy to Cloudflare Pages.

In your astro.config.mjs use:

import { defineConfig } from 'astro/config';
import cloudflare from '@astrojs/cloudflare';

export default defineConfig({
  adapter: cloudflare()
});

Enabling Preview

In order for preview to work you must install wrangler

$ pnpm install wrangler --save-dev

It's then possible to update the preview script in your package.json to "preview": "wrangler pages dev ./dist"

Some integrations such as (react)[https://github.com/withastro/astro/tree/main/packages/integrations/react] rely on web streams. Currently Cloudflare Pages functions are in beta and don't support the streams_enable_constructors feature flag.

In order to work around this:

install the "web-streams-polyfill" package
add import "web-streams-polyfill/es2018"; to the top of the front matter of every page which requires streams, such as server rendering a React component.