Use named export instead of default export (#12740)

.eslintrc.cjs

@@ -146,6 +146,12 @@ module.exports = {
     ],
     "unicorn/prefer-array-flat-map": "error",
     "unicorn/prefer-array-some": "error",
+    "unicorn/prefer-export-from": [
+      "error",
+      {
+        ignoreUsedVariables: true,
+      },
+    ],
     "unicorn/prefer-includes": "error",
     "unicorn/prefer-json-parse-buffer": "error",
     "unicorn/prefer-module": "error",

changelog_unreleased/api/12740.md

@@ -0,0 +1,13 @@
+#### [Breaking] standalone version export style changed (#12740 by @fisker)
+
+The `esm/standalone.mjs` entry has changed export style from default export to named export.
+
+```diff
+- import prettier from "https://unpkg.com/prettier@2.6.2/esm/standalone.mjs";
++ import * as prettier from "https://unpkg.com/prettier@3.0.0/esm/standalone.mjs";
+```
+
+```diff
+- import prettier from "https://unpkg.com/prettier@2.6.2/esm/standalone.mjs";
++ import { format } from "https://unpkg.com/prettier@3.0.0/esm/standalone.mjs";
+```

docs/browser.md

@@ -48,7 +48,7 @@ Note that the [`unpkg` field](https://unpkg.com/#examples) in Prettier’s `pack
 
 ```html
 <script type="module">
-  import prettier from "https://unpkg.com/prettier@2.6.2/esm/standalone.mjs";
+  import * as prettier from "https://unpkg.com/prettier@2.6.2/esm/standalone.mjs";
   import parserGraphql from "https://unpkg.com/prettier@2.6.2/esm/parser-graphql.mjs";
 
   prettier.format("type Query { hello: String }", {
@@ -102,7 +102,7 @@ If you want to format [embedded code](options.md#embedded-language-formatting),
 
 ```html
 <script type="module">
-  import prettier from "https://unpkg.com/prettier@2.6.2/esm/standalone.mjs";
+  import * as prettier from "https://unpkg.com/prettier@2.6.2/esm/standalone.mjs";
   import parserBabel from "https://unpkg.com/prettier@2.6.2/esm/parser-babel.mjs";
 
   console.log(
@@ -119,7 +119,7 @@ The HTML code embedded in JavaScript stays unformatted because the `html` parser
 
 ```html
 <script type="module">
-  import prettier from "https://unpkg.com/prettier@2.6.2/esm/standalone.mjs";
+  import * as prettier from "https://unpkg.com/prettier@2.6.2/esm/standalone.mjs";
   import parserBabel from "https://unpkg.com/prettier@2.6.2/esm/parser-babel.mjs";
   import parserHtml from "https://unpkg.com/prettier@2.6.2/esm/parser-html.mjs";
 

index.js

@@ -1 +1 @@
-export { default } from "./src/index.js";
+export * from "./src/index.js";

scripts/build-website.mjs

@@ -3,7 +3,7 @@
 import path from "node:path";
 import fs from "node:fs/promises";
 import fastGlob from "fast-glob";
-import prettier from "prettier";
+import { format } from "prettier";
 import createEsmUtils from "esm-utils";
 import { execa } from "execa";
 import {
@@ -76,7 +76,7 @@ async function buildPlaygroundFiles() {
 
   await writeFile(
     path.join(PLAYGROUND_PRETTIER_DIR, "parsers-location.js"),
-    prettier.format(
+    format(
       `
         "use strict";
 

scripts/build/config.mjs

@@ -261,6 +261,7 @@ const parsers = [
 const coreBundles = [
   {
     input: "src/index.js",
+    interopDefault: false,
     replaceModule: [
       {
         module: require.resolve("@iarna/toml/lib/toml-parser.js"),
@@ -292,6 +293,7 @@ const coreBundles = [
   },
   {
     input: "src/standalone.js",
+    interopDefault: false,
     name: "prettier",
     target: "universal",
     replaceModule: [

scripts/generate-schema.mjs

@@ -1,11 +1,10 @@
 #!/usr/bin/env node
 
-import prettier from "../index.js";
+import { format, getSupportInfo } from "../index.js";
 import generateSchema from "./utils/generate-schema.mjs";
 
 console.log(
-  prettier.format(
-    JSON.stringify(generateSchema(prettier.getSupportInfo().options)),
-    { parser: "json" }
-  )
+  format(JSON.stringify(generateSchema(getSupportInfo().options)), {
+    parser: "json",
+  })
 );

src/cli/file-info.js

@@ -1,5 +1,5 @@
 import stringify from "fast-json-stable-stringify";
-import prettier from "../index.js";
+import { format, getFileInfo } from "../index.js";
 import { printToScreen } from "./utils.js";
 
 async function logFileInfoOrDie(context) {
@@ -12,7 +12,7 @@ async function logFileInfoOrDie(context) {
     config,
   } = context.argv;
 
-  const fileInfo = await prettier.getFileInfo(file, {
+  const fileInfo = await getFileInfo(file, {
     ignorePath,
     withNodeModules,
     plugins,
@@ -20,7 +20,7 @@ async function logFileInfoOrDie(context) {
     resolveConfig: config !== false,
   });
 
-  printToScreen(await prettier.format(stringify(fileInfo), { parser: "json" }));
+  printToScreen(await format(stringify(fileInfo), { parser: "json" }));
 }
 
 export default logFileInfoOrDie;

src/cli/find-config-path.js

@@ -1,10 +1,10 @@
 import path from "node:path";
-import prettier from "../index.js";
+import { resolveConfigFile } from "../index.js";
 import { printToScreen } from "./utils.js";
 
 async function logResolvedConfigPathOrDie(context) {
   const file = context.argv.findConfigPath;
-  const configFile = await prettier.resolveConfigFile(file);
+  const configFile = await resolveConfigFile(file);
   if (configFile) {
     printToScreen(path.relative(process.cwd(), configFile));
   } else {

src/cli/format.js

@@ -1,7 +1,7 @@
 import { promises as fs } from "node:fs";
 import path from "node:path";
 import chalk from "chalk";
-import prettier from "../index.js";
+import * as prettier from "../index.js";
 import thirdParty from "../common/third-party.cjs";
 import { createIgnorer, errors } from "./prettier-internal.js";
 import { expandPatterns, fixWindowsSlashes } from "./expand-patterns.js";

src/cli/index.js

@@ -1,5 +1,5 @@
 import stringify from "fast-json-stable-stringify";
-import prettier from "../index.js";
+import * as prettier from "../index.js";
 import createLogger from "./logger.js";
 import Context from "./context.js";
 import { parseArgvWithoutPlugins } from "./options/parse-cli-arguments.js";

src/cli/options/get-context-options.js

@@ -1,4 +1,4 @@
-import prettier from "../../index.js";
+import { getSupportInfo } from "../../index.js";
 import { optionsHiddenDefaults } from "../prettier-internal.js";
 import * as constant from "../constant.js";
 import { arrayify } from "../utils.js";
@@ -8,7 +8,7 @@ import {
 } from "./option-map.js";
 
 function getContextOptions(plugins, pluginSearchDirs) {
-  const { options: supportOptions, languages } = prettier.getSupportInfo({
+  const { options: supportOptions, languages } = getSupportInfo({
     showDeprecated: true,
     showUnreleased: true,
     showInternal: true,

src/cli/options/get-options-for-file.js

@@ -1,5 +1,5 @@
 import dashify from "dashify";
-import prettier from "../../index.js";
+import { resolveConfig } from "../../index.js";
 import { normalizeApiOptions } from "../prettier-internal.js";
 import minimist from "./minimist.js";
 import createMinimistOptions from "./create-minimist-options.js";
@@ -68,7 +68,7 @@ async function getOptionsOrDie(context, filePath) {
         : `resolve config from '${filePath}'`
     );
 
-    const options = await prettier.resolveConfig(filePath, {
+    const options = await resolveConfig(filePath, {
       editorconfig: context.argv.editorconfig,
       config: context.argv.config,
     });

src/cli/prettier-internal.js

@@ -1,19 +1,10 @@
-import prettier from "../index.js";
+import { __internal as sharedWithCli } from "../index.js";
 
-const {
+export const {
   errors,
   coreOptions,
   createIgnorer,
   optionsHiddenDefaults,
   normalizeApiOptions,
   normalizeCliOptions,
-} = prettier.__internal;
-
-export {
-  errors,
-  coreOptions,
-  createIgnorer,
-  optionsHiddenDefaults,
-  normalizeApiOptions,
-  normalizeCliOptions,
-};
+} = sharedWithCli;

src/cli/utils.js

@@ -1,7 +1,6 @@
-import prettier from "../index.js";
+import { __internal as sharedWithCli } from "../index.js";
 
-const { arrayify, getLast, isNonEmptyArray, partition } =
-  prettier.__internal.utils;
+const { arrayify, getLast, isNonEmptyArray, partition } = sharedWithCli.utils;
 
 // eslint-disable-next-line no-console
 const printToScreen = console.log.bind(console);

src/common/util.js

@@ -1,8 +1,5 @@
 import escapeStringRegexp from "escape-string-regexp";
-import getLast from "../utils/get-last.js";
 import { getSupportInfo } from "../main/support.js";
-import isNonEmptyArray from "../utils/is-non-empty-array.js";
-import getStringWidth from "../utils/get-string-width.js";
 import {
   skipWhitespace,
   skipSpaces,
@@ -479,11 +476,9 @@ function describeNodeForDebugging(node) {
 
 export {
   inferParserByLanguage,
-  getStringWidth,
   getMaxContinuousCount,
   getMinNotPresentContinuousCount,
   getPenultimate,
-  getLast,
   getNextNonSpaceNonCommentCharacterIndexWithStartIndex,
   getNextNonSpaceNonCommentCharacterIndex,
   getNextNonSpaceNonCommentCharacter,
@@ -511,6 +506,8 @@ export {
   addDanglingComment,
   addTrailingComment,
   isFrontMatterNode,
-  isNonEmptyArray,
   createGroupIdMapper,
 };
+export { default as getLast } from "../utils/get-last.js";
+export { default as isNonEmptyArray } from "../utils/is-non-empty-array.js";
+export { default as getStringWidth } from "../utils/get-string-width.js";

src/index.js

@@ -1,8 +1,7 @@
 import { createRequire } from "node:module";
 import core from "./main/core.js";
-import { getSupportInfo } from "./main/support.js";
-import getFileInfo from "./common/get-file-info.js";
-import * as sharedUtil from "./common/util-shared.js";
+import { getSupportInfo as getSupportInfoWithoutPlugins } from "./main/support.js";
+import getFileInfoWithoutPlugins from "./common/get-file-info.js";
 import {
   loadPlugins,
   clearCache as clearPluginCache,
@@ -12,7 +11,6 @@ import {
   resolveConfigFile,
   clearCache as clearConfigCache,
 } from "./config/resolve-config.js";
-import doc from "./document/index.js";
 import languages from "./languages.js";
 
 import * as errors from "./common/errors.js";
@@ -65,61 +63,64 @@ function withPlugins(fn, optsArgIdx) {
 
 const formatWithCursor = withPlugins(core.formatWithCursor);
 
-const prettier = {
-  formatWithCursor,
+async function format(text, opts) {
+  const { formatted } = await formatWithCursor(text, opts);
+  return formatted;
+}
 
-  async format(text, opts) {
-    const { formatted } = await formatWithCursor(text, opts);
-    return formatted;
-  },
+async function check(text, opts) {
+  const { formatted } = await formatWithCursor(text, opts);
+  return formatted === text;
+}
 
-  async check(text, opts) {
-    const { formatted } = await formatWithCursor(text, opts);
-    return formatted === text;
-  },
+function clearCache() {
+  clearConfigCache();
+  clearPluginCache();
+}
 
-  doc,
+/** @type {typeof getFileInfoWithoutPlugins} */
+const getFileInfo = withPlugins(getFileInfoWithoutPlugins);
 
-  resolveConfig,
-  resolveConfigFile,
-  clearConfigCache() {
-    clearConfigCache();
-    clearPluginCache();
-  },
+/** @type {typeof getSupportInfoWithoutPlugins} */
+const getSupportInfo = withPlugins(getSupportInfoWithoutPlugins, 0);
 
-  /** @type {typeof getFileInfo} */
-  getFileInfo: withPlugins(getFileInfo),
-  /** @type {typeof getSupportInfo} */
-  getSupportInfo: withPlugins(getSupportInfo, 0),
-
-  version,
-
-  util: sharedUtil,
-
-  // Internal shared
-  __internal: {
-    errors,
-    coreOptions,
-    createIgnorer,
-    optionsHiddenDefaults,
-    normalizeApiOptions,
-    normalizeCliOptions,
-    utils: {
-      arrayify,
-      getLast,
-      isNonEmptyArray,
-      partition,
-    },
-  },
-
-  /* istanbul ignore next */
-  __debug: {
-    parse: withPlugins(core.parse),
-    formatAST: withPlugins(core.formatAST),
-    formatDoc: withPlugins(core.formatDoc),
-    printToDoc: withPlugins(core.printToDoc),
-    printDocToString: withPlugins(core.printDocToString),
+// Internal shared with cli
+const sharedWithCli = {
+  errors,
+  coreOptions,
+  createIgnorer,
+  optionsHiddenDefaults,
+  normalizeApiOptions,
+  normalizeCliOptions,
+  utils: {
+    arrayify,
+    getLast,
+    isNonEmptyArray,
+    partition,
   },
 };
 
-export default prettier;
+const debugApis = {
+  parse: withPlugins(core.parse),
+  formatAST: withPlugins(core.formatAST),
+  formatDoc: withPlugins(core.formatDoc),
+  printToDoc: withPlugins(core.printToDoc),
+  printDocToString: withPlugins(core.printDocToString),
+};
+
+export {
+  version,
+  formatWithCursor,
+  format,
+  check,
+  resolveConfig,
+  resolveConfigFile,
+  // TODO: Expose this as `clearCache` in v3
+  clearCache as clearConfigCache,
+  getFileInfo,
+  getSupportInfo,
+  sharedWithCli as __internal,
+  debugApis as __debug,
+};
+export * as util from "./common/util-shared.js";
+export { default as doc } from "./document/index.js";

src/standalone.js

@@ -1,9 +1,7 @@
 import { createRequire } from "node:module";
 import core from "./main/core.js";
-import { getSupportInfo } from "./main/support.js";
-import * as sharedUtil from "./common/util-shared.js";
+import { getSupportInfo as getSupportInfoWithoutPlugins } from "./main/support.js";
 import languages from "./languages.js";
-import doc from "./document/index.js";
 
 const require = createRequire(import.meta.url);
 const { version } = require("../package.json");
@@ -30,34 +28,33 @@ function withPlugins(
 
 const formatWithCursor = withPlugins(core.formatWithCursor);
 
-const prettierStandalone = {
-  formatWithCursor,
+async function format(text, opts) {
+  const { formatted } = await formatWithCursor(text, opts);
+  return formatted;
+}
 
-  async format(text, opts) {
-    const { formatted } = await formatWithCursor(text, opts);
-    return formatted;
-  },
+async function check(text, opts) {
+  const { formatted } = await formatWithCursor(text, opts);
+  return formatted === text;
+}
 
-  async check(text, opts) {
-    const { formatted } = await formatWithCursor(text, opts);
-    return formatted === text;
-  },
+const getSupportInfo = withPlugins(getSupportInfoWithoutPlugins, 0);
 
-  doc,
-
-  getSupportInfo: withPlugins(getSupportInfo, 0),
-
-  version,
-
-  util: sharedUtil,
-
-  __debug: {
-    parse: withPlugins(core.parse),
-    formatAST: withPlugins(core.formatAST),
-    formatDoc: withPlugins(core.formatDoc),
-    printToDoc: withPlugins(core.printToDoc),
-    printDocToString: withPlugins(core.printDocToString),
-  },
+const debugApis = {
+  parse: withPlugins(core.parse),
+  formatAST: withPlugins(core.formatAST),
+  formatDoc: withPlugins(core.formatDoc),
+  printToDoc: withPlugins(core.printToDoc),
+  printDocToString: withPlugins(core.printDocToString),
 };
 
-export default prettierStandalone;
+export {
+  version,
+  formatWithCursor,
+  format,
+  check,
+  getSupportInfo,
+  debugApis as __debug,
+};
+export * as util from "./common/util-shared.js";
+export { default as doc } from "./document/index.js";

standalone.js

@@ -1 +1 @@
-export { default } from "./src/standalone.js";
+export * from "./src/standalone.js";

tests/config/get-prettier.js

@@ -3,10 +3,6 @@ import path from "node:path";
 
 const entry = pathToFileURL(path.join(process.env.PRETTIER_DIR, "index.js"));
 
-const getPrettier = async () => {
-  const { default: prettier } = await import(entry);
-
-  return prettier;
-};
+const getPrettier = () => import(entry);
 
 export default getPrettier;

tests/format/misc/empty/jsfmt.spec.js

@@ -1,4 +1,4 @@
-import prettier from "../../../../index.js";
+import * as prettier from "../../../../index.js";
 
 const parsers = prettier
   .getSupportInfo()

tests/integration/__tests__/bundle.js

@@ -41,9 +41,9 @@ describe("standalone", () => {
   let esmStandalone;
   let esmPlugins;
   beforeAll(async () => {
-    ({ default: esmStandalone } = await import(
+    esmStandalone = await import(
       path.join(distDirectory, "esm/standalone.mjs")
-    ));
+    );
     esmPlugins = await Promise.all(
       fastGlob
         .sync(["esm/parser-*.mjs"], { cwd: distDirectory, absolute: true })