Add playground for current version (#18830)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: fisker <lionkay@gmail.com>

.yarn/plugins/plugin-prepare.cjs

@@ -1,6 +1,8 @@
 const fs = require("node:fs");
 const path = require("node:path");
 
+const root = path.join(__dirname, "../../");
+
 function setupVscode() {
   const settingsFile = path.join(__dirname, "../../.vscode/settings.json");
 
@@ -27,7 +29,11 @@ module.exports = {
   name: "plugin-prepare",
   factory: () => ({
     hooks: {
-      async afterAllInstalled() {
+      async afterAllInstalled({ cwd }) {
+        if (cwd !== root) {
+          return;
+        }
+
         setupVscode();
         try {
           await buildBabelCodeFrameForTest();

scripts/build-website.js

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 
-import fs from "node:fs/promises";
+import assert from "node:assert/strict";
 import path from "node:path";
 import url from "node:url";
 import esbuild from "esbuild";
@@ -13,58 +13,61 @@ import {
   PROJECT_ROOT,
   WEBSITE_DIR,
   writeFile,
-  writeJson,
 } from "./utilities/index.js";
 
 const runYarn = (command, args, options) =>
   spawn("yarn", [command, ...args], { stdio: "inherit", ...options });
+
 const IS_PULL_REQUEST = process.env.PULL_REQUEST === "true";
-const PACKAGES_DIRECTORY = IS_PULL_REQUEST
-  ? DIST_DIR
-  : url.fileURLToPath(new URL("../node_modules", import.meta.url));
-const PLAYGROUND_LIB_DIRECTORY = path.join(WEBSITE_DIR, "static/lib");
+const NODE_MODULES_DIR = url.fileURLToPath(
+  new URL("../node_modules", import.meta.url),
+);
 
 async function writeScript(file, code) {
   const { code: minified } = await esbuild.transform(code, {
     loader: "js",
     minify: true,
   });
-  await writeFile(path.join(PLAYGROUND_LIB_DIRECTORY, file), minified.trim());
+  await writeFile(file, minified.trim());
 }
 
-async function buildPrettier() {
-  // --- Build prettier for PR ---
-  const packageJsonFile = path.join(PROJECT_ROOT, "package.json");
-  const packageJsonContent = await fs.readFile(packageJsonFile);
-  const packageJson = JSON.parse(packageJsonContent);
-  await writeJson(packageJsonFile, {
-    ...packageJson,
-    version: `999.999.999-pr.${process.env.REVIEW_ID}`,
-  });
+/** @param {"stable" | "next"} version */
+async function buildPlaygroundFiles(version) {
+  assert.ok(version === "stable" || version === "next");
 
-  try {
-    await runYarn("build", ["--clean", "--playground"], {
-      cwd: PROJECT_ROOT,
-    });
-  } finally {
-    // restore
-    await writeFile(packageJsonFile, packageJsonContent);
+  let packagesDirectory;
+  const versionData = { name: version };
+  const libDirectory = path.join(WEBSITE_DIR, `static/lib/${version}/`);
+
+  if (version === "stable") {
+    packagesDirectory = NODE_MODULES_DIR;
+    const { version: prettierVersion } = await import(
+      url.pathToFileURL(path.join(packagesDirectory, "prettier/standalone.mjs"))
+    );
+    versionData.version = prettierVersion;
+  }
+
+  if (version === "next") {
+    packagesDirectory = DIST_DIR;
+    versionData.gitTree = await getGitTreeInformation();
+    if (IS_PULL_REQUEST) {
+      versionData.pr = process.env.REVIEW_ID;
+    }
   }
-}
 
-async function buildPlaygroundFiles() {
   const pluginFiles = [];
 
   // Builtin plugins
   for (const fileName of await fastGlob(["plugins/*.mjs"], {
-    cwd: path.join(PACKAGES_DIRECTORY, "prettier"),
+    cwd: path.join(packagesDirectory, "prettier"),
+    ignore: ["plugins/flow*"],
   })) {
     pluginFiles.push(`prettier/${fileName}`);
   }
 
   // TODO: Support stable version
   // External plugins
-  if (IS_PULL_REQUEST) {
+  if (version === "next") {
     for (const pluginName of ["plugin-hermes"]) {
       pluginFiles.push(`${pluginName}/index.mjs`);
     }
@@ -74,6 +77,7 @@ async function buildPlaygroundFiles() {
   }
 
   const packageManifest = {
+    version: versionData,
     prettier: {
       file: "prettier/standalone.mjs",
     },
@@ -82,7 +86,7 @@ async function buildPlaygroundFiles() {
         const plugin = { file };
 
         const pluginModule = await import(
-          url.pathToFileURL(path.join(PACKAGES_DIRECTORY, file))
+          url.pathToFileURL(path.join(packagesDirectory, file))
         );
 
         for (const property of ["languages", "options", "defaultOptions"]) {
@@ -107,24 +111,46 @@ async function buildPlaygroundFiles() {
   await Promise.all([
     ...[packageManifest.prettier, ...packageManifest.plugins].map(({ file }) =>
       copyFile(
-        path.join(PACKAGES_DIRECTORY, file),
-        path.join(PLAYGROUND_LIB_DIRECTORY, file),
+        path.join(packagesDirectory, file),
+        path.join(libDirectory, file),
       ),
     ),
     writeScript(
-      "package-manifest.mjs",
+      path.join(libDirectory, "package-manifest.mjs"),
       `export default ${serialize(packageManifest, { space: 2 })};`,
     ),
   ]);
 }
 
-if (IS_PULL_REQUEST) {
-  console.log("Building prettier...");
-  await buildPrettier();
+async function getGitTreeInformation() {
+  const { stdout: branch } = await spawn("git", [
+    "rev-parse",
+    "--abbrev-ref",
+    "HEAD",
+  ]);
+
+  const { stdout: diff } = await spawn("git", ["diff", "--name-only"]);
+
+  if (diff) {
+    return { branch };
+  }
+
+  const { stdout: commit } = await spawn("git", [
+    "rev-parse",
+    "--short",
+    "HEAD",
+  ]);
+  return { branch, commit };
 }
 
-console.log("Preparing files for playground...");
-await buildPlaygroundFiles();
+console.log("Building prettier...");
+await runYarn("build", ["--clean", "--playground"], { cwd: PROJECT_ROOT });
+
+console.log("Preparing files for playground (stable)...");
+await buildPlaygroundFiles("stable");
+
+console.log("Preparing files for playground (next)...");
+await buildPlaygroundFiles("next");
 
 // --- Site ---
 console.log("Installing website dependencies...");

website/docusaurus.config.js

@@ -77,6 +77,8 @@ const config = {
           path: "../docs",
           sidebarCollapsed: false,
           breadcrumbs: false,
+          lastVersion:
+            process.env.PULL_REQUEST === "true" ? "current" : undefined,
           versions: {
             current: {
               label: "next",

website/playground/Playground.jsx

@@ -162,7 +162,7 @@ function setup(props) {
 
   const getMarkdown = ({ formatted, reformatted, full, doc }) => {
     const { content, options } = state;
-    const { availableOptions, version } = props;
+    const { availableOptions } = props;
     const orderedOptions = orderOptions(availableOptions, [
       ...ENABLED_OPTIONS,
       "rangeStart",
@@ -176,7 +176,7 @@ function setup(props) {
       output: formatted,
       output2: reformatted,
       doc,
-      version,
+      version: props.version,
       url: window.location.href,
       options,
       cliOptions,
@@ -547,7 +547,7 @@ const Playground = {
   name: "Playground",
   props: {
     availableOptions: { type: Array, required: true },
-    version: { type: String, required: true },
+    version: { type: Object, required: true },
   },
   setup,
 };

website/playground/PrettierFormat.js

@@ -1,6 +1,7 @@
 import { onMounted, reactive, toRaw, watch } from "vue";
 import { settings } from "./composables/playground-settings.js";
 import { worker } from "./composables/prettier-worker.js";
+import { version } from "./composables/use-version.js";
 
 function setup(props, { slots }) {
   const state = reactive({ formatted: "", debug: {} });
@@ -14,6 +15,7 @@ function setup(props, { slots }) {
       props.code,
       toRaw(props.options),
       toRaw(settings),
+      version.value,
     );
 
     Object.assign(state, result);
@@ -24,6 +26,7 @@ function setup(props, { slots }) {
   onMounted(componentDidMount);
   watch(() => props.code, format);
   watch(() => props.options, format, { deep: true });
+  watch(() => version.value, format);
 
   // Should not trigger format when these changes
   const ignoredKeys = new Set(["showSidebar", "showInput"]);

website/playground/composables/prettier-worker.js

@@ -2,14 +2,20 @@
 @import {PlaygroundSettings} from "./playground-settings.js"
 @import {FormatMessage, MetaMessage} from "../../static/worker.mjs"
 */
-
 class WorkerApi {
-  #worker = new Worker("/worker.mjs", { type: "module" });
+  #workers = {};
   #counter = 0;
   #handlers = {};
 
-  constructor() {
-    const worker = this.#worker;
+  #initWorker(version) {
+    if (this.#workers[version]) {
+      return this.#workers[version];
+    }
+
+    const worker = new Worker(`/worker.mjs?version=${version}`, {
+      type: "module",
+    });
+    this.#workers[version] = worker;
     const handlers = this.#handlers;
 
     worker.addEventListener("message", (event) => {
@@ -28,20 +34,25 @@ class WorkerApi {
         resolve(message);
       }
     });
+
+    return worker;
   }
 
   #postMessage(message) {
+    const worker = this.#initWorker(message.version);
     const uid = ++this.#counter;
-    const worker = this.#worker;
     return new Promise((resolve, reject) => {
       this.#handlers[uid] = [resolve, reject];
       worker.postMessage({ uid, message });
     });
   }
 
-  getMetadata() {
+  /**
+   * @param {MetaMessage["version"]} version
+   */
+  getMetadata(version) {
     /** @type {MetaMessage} */
-    const message = { type: "meta" };
+    const message = { type: "meta", version };
     return this.#postMessage(message);
   }
 
@@ -49,10 +60,11 @@ class WorkerApi {
    * @param {FormatMessage["code"]} code
    * @param {FormatMessage["options"]} options
    * @param {FormatMessage["settings"]} settings
+   * @param {FormatMessage["version"]} version
    */
-  format(code, options, settings) {
+  format(code, options, settings, version) {
     /** @type {FormatMessage} */
-    const message = { type: "format", code, options, settings };
+    const message = { type: "format", version, code, options, settings };
     return this.#postMessage(message);
   }
 }

website/playground/composables/use-version.js

@@ -0,0 +1,50 @@
+import { ref } from "vue";
+
+const ALLOWED_VERSIONS = new Set(["next", "stable"]);
+const IS_PULL_REQUEST = import.meta.env.VITE_IS_PR;
+const DEFAULT_VERSION = IS_PULL_REQUEST ? "next" : "stable";
+const DOCS_VERSION_KEY = "docs-preferred-version-default";
+
+function getVersion() {
+  const versionInUrl = new URLSearchParams(window.location.search).get(
+    "version",
+  );
+
+  if (ALLOWED_VERSIONS.has(versionInUrl)) {
+    return versionInUrl;
+  }
+
+  let docsVersion = localStorage.getItem(DOCS_VERSION_KEY);
+  if (docsVersion === "current") {
+    docsVersion = "next";
+  }
+
+  if (ALLOWED_VERSIONS.has(docsVersion)) {
+    return docsVersion;
+  }
+
+  return DEFAULT_VERSION;
+}
+
+function setVersion(value) {
+  value = ALLOWED_VERSIONS.has(value) ? value : DEFAULT_VERSION;
+
+  // Save to localStorage, so the docs can respond to version change
+  localStorage.setItem(DOCS_VERSION_KEY, value === "next" ? "current" : value);
+
+  const url = new URL(window.location);
+  if (!IS_PULL_REQUEST && value === DEFAULT_VERSION) {
+    url.searchParams.delete("version");
+  } else {
+    url.searchParams.set("version", value);
+  }
+
+  window.history.replaceState({}, "", url);
+
+  version.value = value;
+}
+
+const version = ref(undefined);
+setVersion(getVersion());
+
+export { setVersion, version };

website/playground/header.vue

@@ -5,42 +5,67 @@ import VersionLink from "./version-link.vue";
 
 const logo = "/icon.png";
 
-defineProps({
-  version: { type: String, required: true },
+const props = defineProps({
+  version: { type: Object, required: true },
 });
 </script>
 
 <template>
-  <header>
+  <header class="header">
     <a href="/" class="logo-wrapper">
       <img class="logo" :src="logo" alt="" />
-      <h1>Prettier <VersionLink :version></VersionLink></h1>
+      <h1>Prettier</h1>
     </a>
 
-    <span class="links">
-      <GithubButton
-        href="https://github.com/prettier/prettier"
-        dataShowCount="true"
-        class="github-button"
-        aria-label="Star prettier on GitHub"
-        >GitHub</GithubButton
-      >
+    <VersionLink :version="version" />
+
+    <div class="links">
+      <div class="github-button">
+        <GithubButton
+          href="https://github.com/prettier/prettier"
+          dataShowCount="true"
+          aria-label="Star prettier on GitHub"
+          >GitHub</GithubButton
+        >
+      </div>
       <ThemeToggle></ThemeToggle>
-    </span>
+    </div>
   </header>
 </template>
 
 <style>
+.header {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.logo-wrapper {
+  display: flex;
+  align-items: center;
+}
+
+.logo-wrapper h1 {
+  font-size: 20px;
+  display: block;
+  font-family: inherit;
+  font-weight: 400;
+  line-height: 18px;
+  position: relative;
+  margin: 0;
+}
+
+.logo {
+  height: 34px;
+  margin-right: 10px;
+}
+
 .links {
   display: flex;
   gap: 8px;
   align-items: flex-end;
 }
 
-.links > * {
-  display: flex;
-}
-
 .github-button span {
   display: flex;
 }

website/playground/index.jsx

@@ -1,26 +1,34 @@
 import "./install-service-worker.js";
 
-import { createApp, onMounted, reactive } from "vue";
+import { createApp, onMounted, reactive, toRaw, watch } from "vue";
+import { settings } from "./composables/playground-settings.js";
 import { worker } from "./composables/prettier-worker.js";
+import { setVersion, version } from "./composables/use-version.js";
 import Header from "./header.vue";
 import Playground from "./Playground.jsx";
-import { fixPrettierVersion } from "./utilities.js";
+import { formatVersion } from "./utilities.js";
 
 const App = {
   name: "App",
   setup() {
-    const state = reactive({ loaded: false });
+    const state = reactive({
+      loaded: false,
+    });
 
-    const componentDidMount = async () => {
-      const { supportInfo, version } = await worker.getMetadata();
+    const updateMetadata = async () => {
+      const { supportInfo, version: versionData } = await worker.getMetadata(
+        version.value,
+      );
 
       Object.assign(state, {
         loaded: true,
         availableOptions: supportInfo.options.map(augmentOption),
-        version: fixPrettierVersion(version),
+        version: formatVersion(versionData),
       });
     };
 
+    watch(() => version.value, updateMetadata);
+
     const render = () => {
       const { loaded, availableOptions, version } = state;
 
@@ -30,13 +38,13 @@ const App = {
 
       return (
         <>
-          <Header version={version}></Header>
+          <Header version={version} />
           <Playground availableOptions={availableOptions} version={version} />
         </>
       );
     };
 
-    onMounted(componentDidMount);
+    onMounted(() => updateMetadata());
     return render;
   },
 };

website/playground/markdown.js

@@ -14,7 +14,7 @@ function formatMarkdown({
   const isIdempotent = !output2 || output === output2;
 
   return [
-    `**Prettier ${version}**`,
+    `**Prettier ${version.text}**`,
     `[Playground link](${url})`,
     optionsString === "" ? null : codeBlock(optionsString, "sh"),
     "",

website/playground/playground.css

@@ -56,6 +56,10 @@ header {
   header {
     padding: 10px;
   }
+
+  .github-button {
+    display: none;
+  }
 }
 
 header a,
@@ -67,27 +71,6 @@ header a:hover {
   text-decoration: none;
 }
 
-.logo-wrapper {
-  display: flex;
-  align-items: center;
-}
-
-.logo {
-  height: 34px;
-  margin-right: 10px;
-}
-
-header h1 {
-  font-size: 20px;
-  display: block;
-  font-family: inherit;
-  font-weight: 400;
-  line-height: 18px;
-  position: relative;
-  z-index: 9999;
-  margin: 0;
-}
-
 .theme-icon {
   padding-block: 2px;
 }

website/playground/utilities.js

@@ -1,9 +1,29 @@
-export function fixPrettierVersion(version) {
-  const match = version.match(/^\d+\.\d+\.\d+-pr.(\d+)$/);
-  if (match) {
-    return `pr-${match[1]}`;
+export function formatVersion(version) {
+  if (version.name === "stable") {
+    return {
+      text: `v${version.version}`,
+      title: `Prettier v${version.version}`,
+      link: `https://github.com/prettier/prettier/releases/tag/${version.version}`,
+    };
   }
-  return version;
+
+  if (version.name === "next" && version.pr) {
+    return {
+      text: `PR #${version.pr}`,
+      title: `Prettier #${version.pr}`,
+      link: `https://github.com/prettier/prettier/pull/${version.pr}`,
+    };
+  }
+
+  const commit = version.gitTree?.commit;
+
+  return {
+    text: commit ?? "uncommitted changes",
+    title: `Prettier (${commit ?? "uncommitted"})`,
+    link: commit
+      ? `https://github.com/prettier/prettier/commit/${commit}`
+      : "https://github.com/prettier/prettier/",
+  };
 }
 
 export function getDefaults(availableOptions, optionNames) {

website/playground/version-link.vue

@@ -1,51 +1,57 @@
 <script setup>
-import { computed, watch, onMounted } from "vue";
+import { watch, onMounted } from "vue";
+import {
+  version as playgroundVersion,
+  setVersion as setPlaygroundVersion,
+} from "./composables/use-version.js";
 
 const props = defineProps({
-  version: { type: String, required: true },
-});
-
-const versionData = computed(() => {
-  const match = props.version.match(/^pr-(\d+)$/);
-  let href;
-  if (match) {
-    href = `pull/${match[1]}`;
-  } else if (/\.0$/.test(props.version)) {
-    href = `releases/tag/${props.version}`;
-  } else {
-    href = `blob/main/CHANGELOG.md#${props.version.replaceAll(".", "")}`;
-  }
-
-  return {
-    href,
-    formattedVersion: match ? `PR #${match[1]}` : `v${props.version}`,
-  };
+  version: { type: Object, required: true },
 });
 
 const updateTitle = () => {
-  document.title = `Prettier ${versionData.value.formattedVersion}`;
+  document.title = props.version.title;
 };
 
-watch(() => props.version, updateTitle);
+watch(() => props.version.title, updateTitle);
 
 onMounted(updateTitle);
 </script>
 
 <template>
-  <a
-    :href="`https://github.com/prettier/prettier/${versionData.href}`"
-    target="_blank"
-    rel="noreferrer noopener"
-    class="version"
-  >
-    {{ versionData.formattedVersion }}
-  </a>
+  <div class="version-wrapper">
+    <select
+      class="channel-select"
+      :value="playgroundVersion"
+      @change="
+        (event) => {
+          setPlaygroundVersion(event.target.value);
+        }
+      "
+    >
+      <option value="stable">stable</option>
+      <option value="next">next</option>
+    </select>
+    <a
+      class="version-link"
+      :href="version.link"
+      target="_blank"
+      rel="noopener noreferrer"
+    >
+      {{ version.text }}
+    </a>
+  </div>
 </template>
 
 <style>
-.version {
-  font-size: 0.5em;
-  line-height: 0;
+.version-wrapper {
+  display: flex;
+  align-items: center;
+  gap: 0.5em;
+  flex: 1;
+}
+
+.version-link {
   opacity: 0.5;
 }
 </style>

website/static/prettier-plugin-doc-explorer.mjs

@@ -1,20 +1,8 @@
-import prettierPackageManifest from "./lib/package-manifest.mjs";
-import * as prettier from "./lib/prettier/standalone.mjs";
-
-const builderNames = new Set(Object.keys(prettier.doc.builders));
-
 const parserName = "doc-explorer";
 const languageName = "Doc explorer";
 const astFormat = parserName;
 
 const expressionParserName = "__js_expression";
-async function getJsExpressionParser() {
-  const plugin = prettierPackageManifest.plugins.find((plugin) =>
-    plugin.parsers?.includes(expressionParserName),
-  );
-  const pluginModule = await import(`./lib/${plugin.file}`);
-  return pluginModule.parsers[expressionParserName];
-}
 
 // `Symbol.for('description')`
 function isSymbol(node) {
@@ -32,7 +20,7 @@ function isSymbol(node) {
   );
 }
 
-function validateNode(node) {
+function validateNode(node, builderNames) {
   if (!node?.type) {
     return;
   }
@@ -54,7 +42,7 @@ function validateNode(node) {
         continue;
       }
 
-      validateNode(value);
+      validateNode(value, builderNames);
     }
     return;
   }
@@ -67,44 +55,61 @@ function validateNode(node) {
     const children = Array.isArray(value) ? value : [value];
 
     for (const child of children) {
-      validateNode(child);
+      validateNode(child, builderNames);
     }
   }
 }
 
-let expressionParser;
-async function validateDoc(text) {
-  expressionParser ??= await getJsExpressionParser();
+export function createDocExplorerPlugin(
+  prettier,
+  prettierPackageManifest,
+  version,
+) {
+  const builderNames = new Set(Object.keys(prettier.doc.builders));
 
-  const ast = expressionParser.parse(text);
-  if (ast.type !== "JsExpressionRoot") {
-    throw new Error("Invalid doc");
+  async function getJsExpressionParser() {
+    const plugin = prettierPackageManifest.plugins.find((plugin) =>
+      plugin.parsers?.includes(expressionParserName),
+    );
+    const pluginModule = await import(`./lib/${version}/${plugin.file}`);
+    return pluginModule.parsers[expressionParserName];
   }
 
-  validateNode(ast.node);
+  let expressionParser;
+  async function validateDoc(text) {
+    expressionParser ??= await getJsExpressionParser();
+
+    const ast = expressionParser.parse(text);
+    if (ast.type !== "JsExpressionRoot") {
+      throw new Error("Invalid doc");
+    }
+
+    validateNode(ast.node, builderNames);
+  }
+
+  async function parse(text) {
+    await validateDoc(text);
+
+    const value = new Function(
+      `{ ${Object.keys(prettier.doc.builders)} }`,
+      `const result = (${text || "''"}\n); return result;`,
+    )(prettier.doc.builders);
+
+    return { value };
+  }
+
+  return {
+    parsers: {
+      [parserName]: {
+        parse,
+        astFormat,
+      },
+    },
+    printers: {
+      [astFormat]: {
+        print: ({ node }) => node.value,
+      },
+    },
+    languages: [{ name: languageName, parsers: [parserName] }],
+  };
 }
-
-async function parse(text) {
-  await validateDoc(text);
-
-  const value = new Function(
-    `{ ${Object.keys(prettier.doc.builders)} }`,
-    `const result = (${text || "''"}\n); return result;`,
-  )(prettier.doc.builders);
-
-  return { value };
-}
-
-export const parsers = {
-  [parserName]: {
-    parse,
-    astFormat,
-  },
-};
-export const printers = {
-  [astFormat]: {
-    print: ({ node }) => node.value,
-  },
-};
-
-export const languages = [{ name: languageName, parsers: [parserName] }];

website/static/service-worker.mjs

@@ -1,17 +1,25 @@
 import "https://cdnjs.cloudflare.com/ajax/libs/sw-toolbox/3.6.0/sw-toolbox.js";
 
-import prettierPackageManifest from "./lib/package-manifest.mjs";
+import prettierPackageManifestNext from "./lib/next/package-manifest.mjs";
+import prettierPackageManifestStable from "./lib/stable/package-manifest.mjs";
 
 const { toolbox } = self;
-const packageFiles = [
-  prettierPackageManifest.prettier,
-  ...prettierPackageManifest.plugins,
-].map(({ file }) => `./lib/${file}`);
+
+function getPackageFiles(manifest) {
+  return [manifest.prettier, ...manifest.plugins].map(
+    ({ file }) => `./lib/${manifest.version.name}/${file}`,
+  );
+}
+
+const stableFiles = getPackageFiles(prettierPackageManifestStable);
+const nextFiles = getPackageFiles(prettierPackageManifestNext);
 
 toolbox.precache([
   // Scripts
-  "lib/package-manifest.mjs",
-  ...packageFiles,
+  "lib/stable/package-manifest.mjs",
+  ...stableFiles,
+  "lib/next/package-manifest.mjs",
+  ...nextFiles,
   "https://cdnjs.cloudflare.com/ajax/libs/sw-toolbox/3.6.0/sw-toolbox.js",
 
   // Images

website/static/worker.mjs

@@ -1,22 +1,74 @@
-import prettierPackageManifest from "./lib/package-manifest.mjs";
-import * as prettier from "./lib/prettier/standalone.mjs";
-import * as prettierPluginDocExplorer from "./prettier-plugin-doc-explorer.mjs";
+import { createDocExplorerPlugin } from "./prettier-plugin-doc-explorer.mjs";
 
 /**
 @import {PlaygroundSettings} from "../playground/composables/playground-settings.js"
-@typedef {{ type: "meta" }} MetaMessage
+@typedef {{
+  type: "meta",
+  version: "stable" | "next",
+}} MetaMessage
 @typedef {{
   type: "format",
   code: string,
   options: any,
-  settings: PlaygroundSettings
+  settings: PlaygroundSettings,
+  version: "stable" | "next",
 }} FormatMessage
 */
 
+const workerUrl = new URL(import.meta.url);
+const version =
+  workerUrl.searchParams.get("version") === "next" ? "next" : "stable";
+
+let prettierCache;
+let prettierPackageManifestCache;
+let prettierPluginDocExplorerCache;
+let pluginsCache;
+
+async function loadPrettier() {
+  if (!prettierCache) {
+    prettierCache = import(`./lib/${version}/prettier/standalone.mjs`);
+  }
+  return await prettierCache;
+}
+
+async function loadPrettierPackageManifest() {
+  if (!prettierPackageManifestCache) {
+    prettierPackageManifestCache = import(
+      `./lib/${version}/package-manifest.mjs`
+    ).then((m) => m.default);
+  }
+  return await prettierPackageManifestCache;
+}
+
+async function loadPrettierPluginDocExplorer() {
+  if (!prettierPluginDocExplorerCache) {
+    const prettier = await loadPrettier();
+    const prettierPackageManifest = await loadPrettierPackageManifest();
+    prettierPluginDocExplorerCache = createDocExplorerPlugin(
+      prettier,
+      prettierPackageManifest,
+      version,
+    );
+  }
+  return prettierPluginDocExplorerCache;
+}
+
+async function loadPlugins() {
+  if (!pluginsCache) {
+    const prettierPackageManifest = await loadPrettierPackageManifest();
+    const prettierPluginDocExplorer = await loadPrettierPluginDocExplorer();
+    pluginsCache = [
+      ...prettierPackageManifest.plugins.map((plugin) => createPlugin(plugin)),
+      prettierPluginDocExplorer,
+    ];
+  }
+  return pluginsCache;
+}
+
 const pluginLoadPromises = new Map();
 async function importPlugin(plugin) {
   if (!pluginLoadPromises.has(plugin)) {
-    pluginLoadPromises.set(plugin, import(`./lib/${plugin.file}`));
+    pluginLoadPromises.set(plugin, import(`./lib/${version}/${plugin.file}`));
   }
 
   try {
@@ -52,11 +104,6 @@ function createPlugin(pluginManifest) {
   return plugin;
 }
 
-const plugins = [
-  ...prettierPackageManifest.plugins.map((plugin) => createPlugin(plugin)),
-  prettierPluginDocExplorer,
-];
-
 self.onmessage = async function (event) {
   self.postMessage({
     uid: event.data.uid,
@@ -113,13 +160,17 @@ function handleMessage(message) {
 }
 
 async function handleMetaMessage() {
+  const prettier = await loadPrettier();
+  const prettierPackageManifest = await loadPrettierPackageManifest();
+
+  const plugins = await loadPlugins();
   const supportInfo = await prettier.getSupportInfo({ plugins });
 
   return {
     type: "meta",
     // eslint-disable-next-line unicorn/prefer-structured-clone
     supportInfo: JSON.parse(JSON.stringify(supportInfo)),
-    version: prettier.version,
+    version: prettierPackageManifest.version,
   };
 }
 
@@ -127,6 +178,8 @@ async function handleMetaMessage() {
 @param {FormatMessage} message
 */
 async function handleFormatMessage(message) {
+  const prettier = await loadPrettier();
+  const plugins = await loadPlugins();
   let { options, code, settings } = message;
   options = { ...options, plugins };
 
@@ -231,6 +284,7 @@ async function handleFormatMessage(message) {
 @param {PlaygroundSettings} settings
 */
 async function formatCode(text, options, settings = {}) {
+  const prettier = await loadPrettier();
   if (options.parser === "doc-explorer") {
     options = {
       ...options,

website/vite.config.mjs

@@ -43,6 +43,11 @@ export default defineConfig({
     outDir: OUT_DIRECTORY,
     minify: IS_CI,
   },
+  define: {
+    "import.meta.env.VITE_IS_PR": JSON.stringify(
+      Boolean(process.env.PULL_REQUEST),
+    ),
+  },
 });
 
 function buildCdnAlias() {