commit 11e75d0e11967ef2eb1df7ff39eb15f3b0c2c723 Author: abearxiong Date: Tue Apr 14 09:27:24 2026 +0800 feat: add initial implementation of Vite + RSC application - Created a new SVG logo for Vite. - Added a List component for rendering a simple list. - Implemented server-side counter functionality with actions. - Introduced a React SVG logo for branding. - Developed a ClientCounter component for client-side state management. - Set up entry points for RSC and SSR rendering. - Established error boundary for global error handling. - Created request handling utilities for differentiating RSC and SSR requests. - Added global styles for the application. - Built the main application structure in the Root component. - Configured Vite with RSC and React plugins for optimal development experience. diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..6a1f0d4 --- /dev/null +++ b/.gitignore @@ -0,0 +1,34 @@ +# dependencies +node_modules/ +.pnp/ +.pnp.js + +# testing +coverage/ + +# production +build/ +dist/ + +# misc +.DS_Store +*.log +npm-debug.log* +yarn-debug.log* +yarn-error.log* + +# env +.env +.env.local +.env.development.local +.env.test.local +.env.production.local + +# editors +.idea/ +.vscode/ +*.swp +*.swo + +# OS +Thumbs.db \ No newline at end of file diff --git a/index.html b/index.html new file mode 100644 index 0000000..eb0d3af --- /dev/null +++ b/index.html @@ -0,0 +1,12 @@ + + + + + + RSC App + + +

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+'use server'; + +export default async function List() { + return ( +

List

+ ); +} \ No newline at end of file diff --git a/src/action.tsx b/src/action.tsx new file mode 100644 index 0000000..4fc55d6 --- /dev/null +++ b/src/action.tsx @@ -0,0 +1,11 @@ +'use server' + +let serverCounter = 0 + +export async function getServerCounter() { + return serverCounter +} + +export async function updateServerCounter(change: number) { + serverCounter += change +} diff --git a/src/assets/react.svg b/src/assets/react.svg new file mode 100644 index 0000000..6c87de9 --- /dev/null +++ b/src/assets/react.svg @@ -0,0 +1 @@ + \ No newline at end of file diff --git a/src/client.tsx b/src/client.tsx new file mode 100644 index 0000000..29bb5d3 --- /dev/null +++ b/src/client.tsx @@ -0,0 +1,13 @@ +'use client' + +import React from 'react' + +export function ClientCounter() { + const [count, setCount] = React.useState(0) + + return ( + + ) +} diff --git a/src/framework/entry.browser.tsx b/src/framework/entry.browser.tsx new file mode 100644 index 0000000..5b48ebd --- /dev/null +++ b/src/framework/entry.browser.tsx @@ -0,0 +1,138 @@ +import { + createFromReadableStream, + createFromFetch, + setServerCallback, + createTemporaryReferenceSet, + encodeReply, +} from '@vitejs/plugin-rsc/browser' +import React from 'react' +import { createRoot, hydrateRoot } from 'react-dom/client' +import { rscStream } from 'rsc-html-stream/client' +import type { RscPayload } from './entry.rsc' +import { GlobalErrorBoundary } from './error-boundary' +import { createRscRenderRequest } from './request' + +async function main() { + // stash `setPayload` function to trigger re-rendering + // from outside of `BrowserRoot` component (e.g. server function call, navigation, hmr) + let setPayload: (v: RscPayload) => void + + // deserialize RSC stream back to React VDOM for CSR + const initialPayload = await createFromReadableStream( + // initial RSC stream is injected in SSR stream as + rscStream, + ) + + // browser root component to (re-)render RSC payload as state + function BrowserRoot() { + const [payload, setPayload_] = React.useState(initialPayload) + + React.useEffect(() => { + setPayload = (v) => React.startTransition(() => setPayload_(v)) + }, [setPayload_]) + + // re-fetch/render on client side navigation + React.useEffect(() => { + return listenNavigation(() => fetchRscPayload()) + }, []) + + return payload.root + } + + // re-fetch RSC and trigger re-rendering + async function fetchRscPayload() { + const renderRequest = createRscRenderRequest(window.location.href) + const payload = await createFromFetch(fetch(renderRequest)) + setPayload(payload) + } + + // register a handler which will be internally called by React + // on server function request after hydration. + setServerCallback(async (id, args) => { + const temporaryReferences = createTemporaryReferenceSet() + const renderRequest = createRscRenderRequest(window.location.href, { + id, + body: await encodeReply(args, { temporaryReferences }), + }) + const payload = await createFromFetch(fetch(renderRequest), { + temporaryReferences, + }) + setPayload(payload) + const { ok, data } = payload.returnValue! + if (!ok) throw data + return data + }) + + // hydration + const browserRoot = ( + + + + + + ) + if ('__NO_HYDRATE' in globalThis) { + createRoot(document).render(browserRoot) + } else { + hydrateRoot(document, browserRoot, { + formState: initialPayload.formState, + }) + } + + // implement server HMR by triggering re-fetch/render of RSC upon server code change + if (import.meta.hot) { + import.meta.hot.on('rsc:update', () => { + fetchRscPayload() + }) + } +} + +// a little helper to setup events interception for client side navigation +function listenNavigation(onNavigation: () => void) { + window.addEventListener('popstate', onNavigation) + + const oldPushState = window.history.pushState + window.history.pushState = function (...args) { + const res = oldPushState.apply(this, args) + onNavigation() + return res + } + + const oldReplaceState = window.history.replaceState + window.history.replaceState = function (...args) { + const res = oldReplaceState.apply(this, args) + onNavigation() + return res + } + + function onClick(e: MouseEvent) { + let link = (e.target as Element).closest('a') + if ( + link && + link instanceof HTMLAnchorElement && + link.href && + (!link.target || link.target === '_self') && + link.origin === location.origin && + !link.hasAttribute('download') && + e.button === 0 && // left clicks only + !e.metaKey && // open in new tab (mac) + !e.ctrlKey && // open in new tab (windows) + !e.altKey && // download + !e.shiftKey && + !e.defaultPrevented + ) { + e.preventDefault() + history.pushState(null, '', link.href) + } + } + document.addEventListener('click', onClick) + + return () => { + document.removeEventListener('click', onClick) + window.removeEventListener('popstate', onNavigation) + window.history.pushState = oldPushState + window.history.replaceState = oldReplaceState + } +} + +main() diff --git a/src/framework/entry.rsc.tsx b/src/framework/entry.rsc.tsx new file mode 100644 index 0000000..c9cf5c4 --- /dev/null +++ b/src/framework/entry.rsc.tsx @@ -0,0 +1,122 @@ +import { + renderToReadableStream, + createTemporaryReferenceSet, + decodeReply, + loadServerAction, + decodeAction, + decodeFormState, +} from '@vitejs/plugin-rsc/rsc' +import type { ReactFormState } from 'react-dom/client' +import { Root } from '../root.tsx' +import { parseRenderRequest } from './request.tsx' + +// The schema of payload which is serialized into RSC stream on rsc environment +// and deserialized on ssr/client environments. +export type RscPayload = { + // this demo renders/serializes/deserizlies entire root html element + // but this mechanism can be changed to render/fetch different parts of components + // based on your own route conventions. + root: React.ReactNode + // server action return value of non-progressive enhancement case + returnValue?: { ok: boolean; data: unknown } + // server action form state (e.g. useActionState) of progressive enhancement case + formState?: ReactFormState +} + +// the plugin by default assumes `rsc` entry having default export of request handler. +// however, how server entries are executed can be customized by registering own server handler. +export default { fetch: handler } + +async function handler(request: Request): Promise { + // differentiate RSC, SSR, action, etc. + const renderRequest = parseRenderRequest(request) + request = renderRequest.request + + // handle server function request + let returnValue: RscPayload['returnValue'] | undefined + let formState: ReactFormState | undefined + let temporaryReferences: unknown | undefined + let actionStatus: number | undefined + if (renderRequest.isAction === true) { + if (renderRequest.actionId) { + // action is called via `ReactClient.setServerCallback`. + const contentType = request.headers.get('content-type') + const body = contentType?.startsWith('multipart/form-data') + ? await request.formData() + : await request.text() + temporaryReferences = createTemporaryReferenceSet() + const args = await decodeReply(body, { temporaryReferences }) + const action = await loadServerAction(renderRequest.actionId) + try { + const data = await action.apply(null, args) + returnValue = { ok: true, data } + } catch (e) { + returnValue = { ok: false, data: e } + actionStatus = 500 + } + } else { + // otherwise server function is called via `

` + // before hydration (e.g. when javascript is disabled). + // aka progressive enhancement. + const formData = await request.formData() + const decodedAction = await decodeAction(formData) + try { + const result = await decodedAction() + formState = await decodeFormState(result, formData) + } catch (e) { + // there's no single general obvious way to surface this error, + // so explicitly return classic 500 response. + return new Response('Internal Server Error: server action failed', { + status: 500, + }) + } + } + } + + // serialization from React VDOM tree to RSC stream. + // we render RSC stream after handling server function request + // so that new render reflects updated state from server function call + // to achieve single round trip to mutate and fetch from server. + const rscPayload: RscPayload = { + root: , + formState, + returnValue, + } + const rscOptions = { temporaryReferences } + const rscStream = renderToReadableStream(rscPayload, rscOptions) + + // Respond RSC stream without HTML rendering as decided by `RenderRequest` + if (renderRequest.isRsc) { + return new Response(rscStream, { + status: actionStatus, + headers: { + 'content-type': 'text/x-component;charset=utf-8', + }, + }) + } + + // Delegate to SSR environment for html rendering. + // The plugin provides `loadModule` helper to allow loading SSR environment entry module + // in RSC environment. however this can be customized by implementing own runtime communication + // e.g. `@cloudflare/vite-plugin`'s service binding. + const ssrEntryModule = await import.meta.viteRsc.loadModule< + typeof import('./entry.ssr.tsx') + >('ssr', 'index') + const ssrResult = await ssrEntryModule.renderHTML(rscStream, { + formState, + // allow quick simulation of javascript disabled browser + debugNojs: renderRequest.url.searchParams.has('__nojs'), + }) + + // respond html + return new Response(ssrResult.stream, { + status: ssrResult.status, + headers: { + 'Content-type': 'text/html', + }, + }) +} + +if (import.meta.hot) { + import.meta.hot.accept() +} diff --git a/src/framework/entry.ssr.tsx b/src/framework/entry.ssr.tsx new file mode 100644 index 0000000..7fc5a95 --- /dev/null +++ b/src/framework/entry.ssr.tsx @@ -0,0 +1,74 @@ +import { createFromReadableStream } from '@vitejs/plugin-rsc/ssr' +import React from 'react' +import type { ReactFormState } from 'react-dom/client' +import { renderToReadableStream } from 'react-dom/server.edge' +import { injectRSCPayload } from 'rsc-html-stream/server' +import type { RscPayload } from './entry.rsc' + +export async function renderHTML( + rscStream: ReadableStream, + options: { + formState?: ReactFormState + nonce?: string + debugNojs?: boolean + }, +): Promise<{ stream: ReadableStream; status?: number }> { + // duplicate one RSC stream into two. + // - one for SSR (ReactClient.createFromReadableStream below) + // - another for browser hydration payload by injecting . + const [rscStream1, rscStream2] = rscStream.tee() + + // deserialize RSC stream back to React VDOM + let payload: Promise | undefined + function SsrRoot() { + // deserialization needs to be kicked off inside ReactDOMServer context + // for ReactDomServer preinit/preloading to work + payload ??= createFromReadableStream(rscStream1) + return React.use(payload).root + } + + // render html (traditional SSR) + const bootstrapScriptContent = + await import.meta.viteRsc.loadBootstrapScriptContent('index') + let htmlStream: ReadableStream + let status: number | undefined + try { + htmlStream = await renderToReadableStream(, { + bootstrapScriptContent: options?.debugNojs + ? undefined + : bootstrapScriptContent, + nonce: options?.nonce, + formState: options?.formState, + }) + } catch (e) { + // fallback to render an empty shell and run pure CSR on browser, + // which can replay server component error and trigger error boundary. + status = 500 + htmlStream = await renderToReadableStream( + + + + + , + { + bootstrapScriptContent: + `self.__NO_HYDRATE=1;` + + (options?.debugNojs ? '' : bootstrapScriptContent), + nonce: options?.nonce, + }, + ) + } + + let responseStream: ReadableStream = htmlStream + if (!options?.debugNojs) { + // initial RSC stream is injected in HTML stream as + // using utility made by devongovett https://github.com/devongovett/rsc-html-stream + responseStream = responseStream.pipeThrough( + injectRSCPayload(rscStream2, { + nonce: options?.nonce, + }), + ) + } + + return { stream: responseStream, status } +} diff --git a/src/framework/error-boundary.tsx b/src/framework/error-boundary.tsx new file mode 100644 index 0000000..39d9165 --- /dev/null +++ b/src/framework/error-boundary.tsx @@ -0,0 +1,81 @@ +'use client' + +import React from 'react' + +// Minimal ErrorBoundary example to handle errors globally on browser +export function GlobalErrorBoundary(props: { children?: React.ReactNode }) { + return ( + + {props.children} + + ) +} + +// https://github.com/vercel/next.js/blob/33f8428f7066bf8b2ec61f025427ceb2a54c4bdf/packages/next/src/client/components/error-boundary.tsx +// https://react.dev/reference/react/Component#catching-rendering-errors-with-an-error-boundary +class ErrorBoundary extends React.Component<{ + children?: React.ReactNode + errorComponent: React.FC<{ + error: Error + reset: () => void + }> +}> { + state: { error?: Error } = {} + + static getDerivedStateFromError(error: Error) { + return { error } + } + + reset = () => { + this.setState({ error: null }) + } + + render() { + const error = this.state.error + if (error) { + return + } + return this.props.children + } +} + +// https://github.com/vercel/next.js/blob/677c9b372faef680d17e9ba224743f44e1107661/packages/next/src/build/webpack/loaders/next-app-loader.ts#L73 +// https://github.com/vercel/next.js/blob/677c9b372faef680d17e9ba224743f44e1107661/packages/next/src/client/components/error-boundary.tsx#L145 +function DefaultGlobalErrorPage(props: { error: Error; reset: () => void }) { + return ( + + + Unexpected Error + + +

Caught an unexpected error

+          Error:{' '}
+          {import.meta.env.DEV && 'message' in props.error
+            ? props.error.message
+            : '(Unknown)'}
+

+ + + + ) +} diff --git a/src/framework/request.tsx b/src/framework/request.tsx new file mode 100644 index 0000000..4c7c666 --- /dev/null +++ b/src/framework/request.tsx @@ -0,0 +1,58 @@ +// Framework conventions (arbitrary choices for this demo): +// - Use `_.rsc` URL suffix to differentiate RSC requests from SSR requests +// - Use `x-rsc-action` header to pass server action ID +const URL_POSTFIX = '_.rsc' +const HEADER_ACTION_ID = 'x-rsc-action' + +// Parsed request information used to route between RSC/SSR rendering and action handling. +// Created by parseRenderRequest() from incoming HTTP requests. +type RenderRequest = { + isRsc: boolean // true if request should return RSC payload (via _.rsc suffix) + isAction: boolean // true if this is a server action call (POST request) + actionId?: string // server action ID from x-rsc-action header + request: Request // normalized Request with _.rsc suffix removed from URL + url: URL // normalized URL with _.rsc suffix removed +} + +export function createRscRenderRequest( + urlString: string, + action?: { id: string; body: BodyInit }, +): Request { + const url = new URL(urlString) + url.pathname += URL_POSTFIX + const headers = new Headers() + if (action) { + headers.set(HEADER_ACTION_ID, action.id) + } + return new Request(url.toString(), { + method: action ? 'POST' : 'GET', + headers, + body: action?.body, + }) +} + +export function parseRenderRequest(request: Request): RenderRequest { + const url = new URL(request.url) + const isAction = request.method === 'POST' + if (url.pathname.endsWith(URL_POSTFIX)) { + url.pathname = url.pathname.slice(0, -URL_POSTFIX.length) + const actionId = request.headers.get(HEADER_ACTION_ID) || undefined + if (request.method === 'POST' && !actionId) { + throw new Error('Missing action id header for RSC action request') + } + return { + isRsc: true, + isAction, + actionId, + request: new Request(url, request), + url, + } + } else { + return { + isRsc: false, + isAction, + request, + url, + } + } +} diff --git a/src/index.css b/src/index.css new file mode 100644 index 0000000..f4d2128 --- /dev/null +++ b/src/index.css @@ -0,0 +1,112 @@ +:root { + font-family: system-ui, Avenir, Helvetica, Arial, sans-serif; + line-height: 1.5; + font-weight: 400; + + color-scheme: light dark; + color: rgba(255, 255, 255, 0.87); + background-color: #242424; + + font-synthesis: none; + text-rendering: optimizeLegibility; + -webkit-font-smoothing: antialiased; + -moz-osx-font-smoothing: grayscale; +} + +a { + font-weight: 500; + color: #646cff; + text-decoration: inherit; +} +a:hover { + color: #535bf2; +} + +body { + margin: 0; + display: flex; + place-items: center; + min-width: 320px; + min-height: 100vh; +} + +h1 { + font-size: 3.2em; + line-height: 1.1; +} + +button { + border-radius: 8px; + border: 1px solid transparent; + padding: 0.6em 1.2em; + font-size: 1em; + font-weight: 500; + font-family: inherit; + background-color: #1a1a1a; + cursor: pointer; + transition: border-color 0.25s; +} +button:hover { + border-color: #646cff; +} +button:focus, +button:focus-visible { + outline: 4px auto -webkit-focus-ring-color; +} + +@media (prefers-color-scheme: light) { + :root { + color: #213547; + background-color: #ffffff; + } + a:hover { + color: #747bff; + } + button { + background-color: #f9f9f9; + } +} + +#root { + max-width: 1280px; + margin: 0 auto; + padding: 2rem; + text-align: center; +} + +.logo { + height: 6em; + padding: 1.5em; + will-change: filter; + transition: filter 300ms; +} +.logo:hover { + filter: drop-shadow(0 0 2em #646cffaa); +} +.logo.react:hover { + filter: drop-shadow(0 0 2em #61dafbaa); +} + +@keyframes logo-spin { + from { + transform: rotate(0deg); + } + to { + transform: rotate(360deg); + } +} + +@media (prefers-reduced-motion: no-preference) { + a:nth-of-type(2) .logo { + animation: logo-spin infinite 20s linear; + } +} + +.card { + padding: 1rem; +} + +.read-the-docs { + color: #888; + text-align: left; +} diff --git a/src/root.tsx b/src/root.tsx new file mode 100644 index 0000000..116e86a --- /dev/null +++ b/src/root.tsx @@ -0,0 +1,75 @@ +import './index.css' // css import is automatically injected in exported server components +import viteLogo from '/vite.svg' +import { getServerCounter, updateServerCounter } from './action.tsx' +import reactLogo from './assets/react.svg' +import { ClientCounter } from './client.tsx' +import List from './List' + +export function Root(props: { url: URL }) { + return ( + + + + + + Vite + RSC + + + + + + ) +} + +function App(props: { url: URL }) { + return ( +

+ +

+ + +

+ +

Vite + RSC

+ +

+ + + +

Request URL: {props.url?.href}

+ +

+ Edit src/client.tsx to test client HMR. +
+ Edit src/root.tsx to test server HMR. +
+ Visit{' '} + + _.rsc + {' '} + to view RSC stream payload. +
+ Visit{' '} + + ?__nojs + {' '} + to test server action without js enabled. +

+ ) +} diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..b212cd7 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,17 @@ +{ + "compilerOptions": { + "erasableSyntaxOnly": true, + "allowImportingTsExtensions": true, + "noUnusedLocals": true, + "noUnusedParameters": true, + "skipLibCheck": true, + "verbatimModuleSyntax": true, + "noEmit": true, + "moduleResolution": "Bundler", + "module": "ESNext", + "target": "ESNext", + "lib": ["ESNext", "DOM"], + "types": ["vite/client", "@vitejs/plugin-rsc/types"], + "jsx": "react-jsx" + } +} diff --git a/vite.config.ts b/vite.config.ts new file mode 100644 index 0000000..9b9c9e0 --- /dev/null +++ b/vite.config.ts @@ -0,0 +1,72 @@ +import react from '@vitejs/plugin-react' +import rsc from '@vitejs/plugin-rsc' +import { defineConfig } from 'vite' + +export default defineConfig({ + plugins: [ + rsc({ + // `entries` option is only a shorthand for specifying each `rollupOptions.input` below + // > entries: { rsc, ssr, client }, + // + // by default, the plugin setup request handler based on `default export` of `rsc` environment `rollupOptions.input.index`. + // This can be disabled when setting up own server handler e.g. `@cloudflare/vite-plugin`. + // > serverHandler: false + }), + + // use any of react plugins https://github.com/vitejs/vite-plugin-react + // to enable client component HMR + react(), + + // use https://github.com/antfu-collective/vite-plugin-inspect + // to understand internal transforms required for RSC. + // import("vite-plugin-inspect").then(m => m.default()), + ], + + // specify entry point for each environment. + // (currently the plugin assumes `rollupOptions.input.index` for some features.) + environments: { + // `rsc` environment loads modules with `react-server` condition. + // this environment is responsible for: + // - RSC stream serialization (React VDOM -> RSC stream) + // - server functions handling + rsc: { + build: { + rollupOptions: { + input: { + index: './src/framework/entry.rsc.tsx', + }, + }, + }, + }, + + // `ssr` environment loads modules without `react-server` condition. + // this environment is responsible for: + // - RSC stream deserialization (RSC stream -> React VDOM) + // - traditional SSR (React VDOM -> HTML string/stream) + ssr: { + build: { + rollupOptions: { + input: { + index: './src/framework/entry.ssr.tsx', + }, + }, + }, + }, + + // client environment is used for hydration and client-side rendering + // this environment is responsible for: + // - RSC stream deserialization (RSC stream -> React VDOM) + // - traditional CSR (React VDOM -> Browser DOM tree mount/hydration) + // - refetch and re-render RSC + // - calling server functions + client: { + build: { + rollupOptions: { + input: { + index: './src/framework/entry.browser.tsx', + }, + }, + }, + }, + }, +})