From 44d246a2a25473f65ab6be98cf5fe63d3ffe8f8d Mon Sep 17 00:00:00 2001
From: fisker Cheung <lionkay@gmail.com>
Date: Mon, 1 Aug 2022 10:51:31 +0800
Subject: [PATCH] Support config file in ESM (#13130)

---
 changelog_unreleased/api/13130.md             |  19 ++++
 docs/configuration.md                         |  26 ++++-
 package.json                                  |   1 +
 scripts/build/bundler.mjs                     |   1 +
 .../build/esbuild-plugins/throw-warnings.mjs  |  12 +-
 src/config/get-prettier-config-explorer.js    |  32 +++++-
 src/config/load-external-config.js            |  27 +++++
 src/utils/import-from-file.js                 |   9 ++
 src/utils/require-from-file.js                |   8 ++
 .../__snapshots__/config-resolution.js.snap   |  14 ++-
 tests/integration/__tests__/config-invalid.js |   4 +-
 .../__tests__/config-resolution.js            | 106 ++++++++++++++++--
 .../__tests__/plugin-options-string.js        |   4 +-
 .../{ => cjs-package}/index.js                |   0
 .../@company/prettier-config/index.json       |   0
 .../@company/prettier-config/package.json     |   0
 .../{ => cjs-package}/package.json            |   0
 .../config/external-config/esm-file/index.js  |   1 +
 .../esm-file/my-prettier-config-file.js       |   4 +
 .../external-config/esm-file/package.json     |   5 +
 .../external-config/esm-package/index.js      |   1 +
 .../@company/prettier-config/index.js         |   4 +
 .../@company/prettier-config/package.json     |   7 ++
 .../external-config/esm-package/package.json  |   3 +
 .../package.json                              |   5 +
 .../prettier.config.js                        |   6 +
 .../package.json                              |   5 +
 .../prettier.config.js                        |   4 +
 .../package.json                              |   4 +
 .../prettier.config.js                        |   6 +
 .../.prettierrc.js                            |   6 +
 .../package.json                              |   5 +
 .../.prettierrc.js                            |   6 +
 .../package.json                              |   5 +
 .../.prettierrc.js                            |   6 +
 .../package.json                              |   4 +
 .../package.json                              |   5 +
 .../prettier.config.js                        |   4 +
 .../package.json                              |   5 +
 .../prettier.config.js                        |   4 +
 .../package.json                              |   4 +
 .../prettier.config.js                        |   4 +
 .../.prettierrc.js                            |   4 +
 .../package.json                              |   5 +
 .../.prettierrc.js                            |   4 +
 .../package.json                              |   5 +
 .../.prettierrc.js                            |   4 +
 .../package.json                              |   4 +
 .../package.json                              |   5 +
 .../prettier.config.mjs                       |   4 +
 .../package.json                              |   5 +
 .../prettier.config.mjs                       |   4 +
 .../package.json                              |   4 +
 .../prettier.config.mjs                       |   4 +
 .../.prettierrc.mjs                           |   4 +
 .../package.json                              |   5 +
 .../.prettierrc.mjs                           |   4 +
 .../package.json                              |   5 +
 .../.prettierrc.mjs                           |   4 +
 .../prettierrc-mjs-in-type-none/package.json  |   4 +
 yarn.lock                                     |  19 ++++
 61 files changed, 442 insertions(+), 31 deletions(-)
 create mode 100644 changelog_unreleased/api/13130.md
 create mode 100644 src/config/load-external-config.js
 create mode 100644 src/utils/import-from-file.js
 create mode 100644 src/utils/require-from-file.js
 rename tests/integration/cli/config/external-config/{ => cjs-package}/index.js (100%)
 rename tests/integration/cli/config/external-config/{ => cjs-package}/node_modules/@company/prettier-config/index.json (100%)
 rename tests/integration/cli/config/external-config/{ => cjs-package}/node_modules/@company/prettier-config/package.json (100%)
 rename tests/integration/cli/config/external-config/{ => cjs-package}/package.json (100%)
 create mode 100644 tests/integration/cli/config/external-config/esm-file/index.js
 create mode 100644 tests/integration/cli/config/external-config/esm-file/my-prettier-config-file.js
 create mode 100644 tests/integration/cli/config/external-config/esm-file/package.json
 create mode 100644 tests/integration/cli/config/external-config/esm-package/index.js
 create mode 100644 tests/integration/cli/config/external-config/esm-package/node_modules/@company/prettier-config/index.js
 create mode 100644 tests/integration/cli/config/external-config/esm-package/node_modules/@company/prettier-config/package.json
 create mode 100644 tests/integration/cli/config/external-config/esm-package/package.json
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-commonjs/package.json
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-commonjs/prettier.config.js
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-module/package.json
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-module/prettier.config.js
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-none/package.json
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-none/prettier.config.js
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-commonjs/.prettierrc.js
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-commonjs/package.json
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-module/.prettierrc.js
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-module/package.json
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-none/.prettierrc.js
 create mode 100644 tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-none/package.json
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-commonjs/package.json
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-commonjs/prettier.config.js
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-module/package.json
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-module/prettier.config.js
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-none/package.json
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-none/prettier.config.js
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-commonjs/.prettierrc.js
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-commonjs/package.json
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-module/.prettierrc.js
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-module/package.json
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-none/.prettierrc.js
 create mode 100644 tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-none/package.json
 create mode 100644 tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-commonjs/package.json
 create mode 100644 tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-commonjs/prettier.config.mjs
 create mode 100644 tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-module/package.json
 create mode 100644 tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-module/prettier.config.mjs
 create mode 100644 tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-none/package.json
 create mode 100644 tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-none/prettier.config.mjs
 create mode 100644 tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-commonjs/.prettierrc.mjs
 create mode 100644 tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-commonjs/package.json
 create mode 100644 tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-module/.prettierrc.mjs
 create mode 100644 tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-module/package.json
 create mode 100644 tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-none/.prettierrc.mjs
 create mode 100644 tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-none/package.json

diff --git a/changelog_unreleased/api/13130.md b/changelog_unreleased/api/13130.md
new file mode 100644
index 000000000..d59d818a3
--- /dev/null
+++ b/changelog_unreleased/api/13130.md
@@ -0,0 +1,19 @@
+#### Support config files in ESM (#13130 by @fisker)
+
+Config files in ESM are supported, supported config file names:
+
+- `prettier.config.js` (in place with `{"type": "module"}` in `package.json`)
+- `.prettierrc.js` (same as above)
+- `prettier.config.mjs`
+- `.prettierrc.mjs`.
+
+```js
+export default {
+  trailingComma: "es5",
+  tabWidth: 4,
+  semi: false,
+  singleQuote: true,
+};
+```
+
+**[Shareable config package](https://prettier.io/docs/en/configuration.html#sharing-configurations) can also be a pure ESM package.**
diff --git a/docs/configuration.md b/docs/configuration.md
index 3d8c40920..48b928961 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -8,7 +8,9 @@ Prettier uses [cosmiconfig](https://github.com/davidtheclark/cosmiconfig) for co
 - A `"prettier"` key in your `package.json` file.
 - A `.prettierrc` file written in JSON or YAML.
 - A `.prettierrc.json`, `.prettierrc.yml`, `.prettierrc.yaml`, or `.prettierrc.json5` file.
-- A `.prettierrc.js`, `.prettierrc.cjs`, `prettier.config.js`, or `prettier.config.cjs` file that exports an object using `module.exports`.
+- A `.prettierrc.js`, or `prettier.config.js` file that exports an object using `export default` or `module.exports` (depends on the [`type`](https://nodejs.org/api/packages.html#type) value in your `package.json`).
+- A `.prettierrc.mjs`, or `prettier.config.mjs` file that exports an object using `export default`.
+- A `.prettierrc.cjs`, or `prettier.config.cjs` file that exports an object using `module.exports`.
 - A `.prettierrc.toml` file.
 
 The configuration file will be resolved starting from the location of the file being formatted, and searching up the file tree until a config file is (or isn’t) found.
@@ -30,10 +32,22 @@ JSON:
 }
 ```
 
-JS:
+JS(ESM):
 
 ```js
-// prettier.config.js or .prettierrc.js
+// prettier.config.js, .prettierrc.js, prettier.config.mjs, or .prettierrc.mjs
+export default {
+  trailingComma: "es5",
+  tabWidth: 4,
+  semi: false,
+  singleQuote: true,
+};
+```
+
+JS(CommonJS):
+
+```js
+// prettier.config.js, .prettierrc.js, prettier.config.cjs, or .prettierrc.cjs
 module.exports = {
   trailingComma: "es5",
   tabWidth: 4,
@@ -130,8 +144,10 @@ An example configuration repository is available [here](https://github.com/azz/p
 > Note: This method does **not** offer a way to _extend_ the configuration to overwrite some properties from the shared configuration. If you need to do that, import the file in a `.prettierrc.js` file and export the modifications, e.g:
 >
 > ```js
-> module.exports = {
->   ...require("@company/prettier-config"),
+> import companyPrettierConfig from "@company/prettier-config";
+>
+> export default {
+>   ...companyPrettierConfig,
 >   semi: false,
 > };
 > ```
diff --git a/package.json b/package.json
index a6b9a994d..eb5c57847 100644
--- a/package.json
+++ b/package.json
@@ -58,6 +58,7 @@
     "html-tag-names": "2.0.1",
     "html-void-elements": "2.0.1",
     "ignore": "5.2.0",
+    "import-meta-resolve": "2.0.3",
     "jest-docblock": "28.1.1",
     "json5": "2.2.1",
     "leven": "4.0.0",
diff --git a/scripts/build/bundler.mjs b/scripts/build/bundler.mjs
index 03f23196f..de8682f91 100644
--- a/scripts/build/bundler.mjs
+++ b/scripts/build/bundler.mjs
@@ -203,6 +203,7 @@ function* getEsbuildOptions(bundle, buildOptions) {
         esbuildPluginVisualizer({ formats: buildOptions.reports }),
       esbuildPluginThrowWarnings({
         allowDynamicRequire: bundle.target === "node",
+        allowDynamicImport: bundle.target === "node",
       }),
     ].filter(Boolean),
     minify: shouldMinify,
diff --git a/scripts/build/esbuild-plugins/throw-warnings.mjs b/scripts/build/esbuild-plugins/throw-warnings.mjs
index 9b7c9e1b5..e126d3edf 100644
--- a/scripts/build/esbuild-plugins/throw-warnings.mjs
+++ b/scripts/build/esbuild-plugins/throw-warnings.mjs
@@ -57,7 +57,10 @@ const logOverride = Object.fromEntries(
   ESBUILD_MESSAGE_IDS.map((id) => [id, "warning"])
 );
 
-export default function esbuildPluginThrowWarnings({ allowDynamicRequire }) {
+export default function esbuildPluginThrowWarnings({
+  allowDynamicRequire,
+  allowDynamicImport,
+}) {
   return {
     name: "throw-warnings",
     setup(build) {
@@ -82,6 +85,13 @@ export default function esbuildPluginThrowWarnings({ allowDynamicRequire }) {
             continue;
           }
 
+          if (
+            allowDynamicImport &&
+            warning.id === "unsupported-dynamic-import"
+          ) {
+            continue;
+          }
+
           if (
             [
               "node_modules/flow-parser/flow_parser.js",
diff --git a/src/config/get-prettier-config-explorer.js b/src/config/get-prettier-config-explorer.js
index f6de658c6..8e616c535 100644
--- a/src/config/get-prettier-config-explorer.js
+++ b/src/config/get-prettier-config-explorer.js
@@ -1,7 +1,8 @@
-import { createRequire } from "node:module";
+import { pathToFileURL } from "node:url";
 import loadToml from "../utils/load-toml.js";
 import loadJson5 from "../utils/load-json5.js";
 import thirdParty from "../common/third-party.js";
+import loadExternalConfig from "./load-external-config.js";
 
 const { cosmiconfig } = thirdParty;
 
@@ -13,23 +14,45 @@ const searchPlaces = [
   ".prettierrc.yml",
   ".prettierrc.json5",
   ".prettierrc.js",
+  ".prettierrc.mjs",
   ".prettierrc.cjs",
   "prettier.config.js",
+  "prettier.config.mjs",
   "prettier.config.cjs",
   ".prettierrc.toml",
 ];
 
-const loaders = { ".toml": loadToml, ".json5": loadJson5 };
+async function loadJs(filepath /*, content*/) {
+  const module = await import(pathToFileURL(filepath).href);
+  return module.default;
+}
 
-function transform(result) {
+const loaders = {
+  ".toml": loadToml,
+  ".json5": loadJson5,
+  ".js": loadJs,
+  ".mjs": loadJs,
+  ".cjs": loadJs,
+};
+
+async function transform(result) {
   if (!result?.config) {
     return result;
   }
 
   let { config, filepath } = result;
 
+  /*
+  We support external config
+
+  ```json
+  {
+    "prettier": "my-prettier-config-package-or-file"
+  }
+  ```
+  */
   if (typeof config === "string") {
-    config = createRequire(filepath)(config);
+    config = await loadExternalConfig(config, filepath);
     result.config = config;
   }
 
@@ -41,7 +64,6 @@ function transform(result) {
   }
 
   delete config.$schema;
-
   return result;
 }
 
diff --git a/src/config/load-external-config.js b/src/config/load-external-config.js
new file mode 100644
index 000000000..4e8199284
--- /dev/null
+++ b/src/config/load-external-config.js
@@ -0,0 +1,27 @@
+import requireFromFile from "../utils/require-from-file.js";
+import importFromFile from "../utils/import-from-file.js";
+
+async function loadExternalConfig(config, filepath) {
+  /*
+  Try `require()` first, this is how it works in Prettier v2.
+  Kept this because the external config path or package may can't load with `import()`:
+  1. is JSON file or package
+  2. is CommonJS file without extension
+  3. is a dirname with index.js inside
+  */
+  try {
+    return requireFromFile(config, filepath);
+  } catch (error) {
+    if (
+      error?.code !== "MODULE_NOT_FOUND" &&
+      error?.code !== "ERR_REQUIRE_ESM"
+    ) {
+      throw error;
+    }
+  }
+
+  const module = await importFromFile(config, filepath);
+  return module.default;
+}
+
+export default loadExternalConfig;
diff --git a/src/utils/import-from-file.js b/src/utils/import-from-file.js
new file mode 100644
index 000000000..246b461a7
--- /dev/null
+++ b/src/utils/import-from-file.js
@@ -0,0 +1,9 @@
+import { pathToFileURL } from "node:url";
+import { resolve } from "import-meta-resolve";
+
+async function importFromFile(specifier, parent) {
+  const url = await resolve(specifier, pathToFileURL(parent).href);
+  return import(url);
+}
+
+export default importFromFile;
diff --git a/src/utils/require-from-file.js b/src/utils/require-from-file.js
new file mode 100644
index 000000000..b9c78a487
--- /dev/null
+++ b/src/utils/require-from-file.js
@@ -0,0 +1,8 @@
+import { createRequire } from "node:module";
+
+function requireFromFile(id, parent) {
+  const require = createRequire(parent);
+  return require(id);
+}
+
+export default requireFromFile;
diff --git a/tests/integration/__tests__/__snapshots__/config-resolution.js.snap b/tests/integration/__tests__/__snapshots__/config-resolution.js.snap
index 625006c65..1eb93c5a8 100644
--- a/tests/integration/__tests__/__snapshots__/config-resolution.js.snap
+++ b/tests/integration/__tests__/__snapshots__/config-resolution.js.snap
@@ -27,14 +27,20 @@ exports[`resolves configuration file with --find-config-path file (stdout) 1`] =
 
 exports[`resolves configuration file with --find-config-path file (write) 1`] = `[]`;
 
-exports[`resolves external configuration from package.json (stderr) 1`] = `""`;
-
-exports[`resolves external configuration from package.json (stdout) 1`] = `
+exports[`resolves external configuration from package.json (cjs package) (stdout) 1`] = `
 "console.log("should have no semi")
 "
 `;
 
-exports[`resolves external configuration from package.json (write) 1`] = `[]`;
+exports[`resolves external configuration from package.json (esm file) (stdout) 1`] = `
+"console.log("should have no semi")
+"
+`;
+
+exports[`resolves external configuration from package.json (esm package) (stdout) 1`] = `
+"console.log("should have no semi")
+"
+`;
 
 exports[`resolves json configuration file with --find-config-path file (stderr) 1`] = `""`;
 
diff --git a/tests/integration/__tests__/config-invalid.js b/tests/integration/__tests__/config-invalid.js
index f88e82a5e..63497cdc0 100644
--- a/tests/integration/__tests__/config-invalid.js
+++ b/tests/integration/__tests__/config-invalid.js
@@ -15,9 +15,7 @@ describe("throw error for unsupported extension", () => {
 describe("throw error with invalid config format", () => {
   runPrettier("cli/config/invalid", ["--config", "file/.prettierrc"]).test({
     status: "non-zero",
-    stderr: expect.stringMatching(
-      /Cannot (?:resolve|find) module '--invalid--'/
-    ),
+    stderr: expect.stringMatching(/Cannot find package '--invalid--'/),
   });
 });
 
diff --git a/tests/integration/__tests__/config-resolution.js b/tests/integration/__tests__/config-resolution.js
index e39cb0641..fa11c4553 100644
--- a/tests/integration/__tests__/config-resolution.js
+++ b/tests/integration/__tests__/config-resolution.js
@@ -27,9 +27,27 @@ describe("accepts configuration from --config", () => {
   });
 });
 
-describe("resolves external configuration from package.json", () => {
-  runPrettier("cli/config/", ["external-config/index.js"]).test({
+describe("resolves external configuration from package.json (cjs package)", () => {
+  runPrettier("cli/config/external-config/cjs-package", ["index.js"]).test({
     status: 0,
+    stderr: "",
+    write: [],
+  });
+});
+
+describe("resolves external configuration from package.json (esm package)", () => {
+  runPrettier("cli/config/external-config/esm-package", ["index.js"]).test({
+    status: 0,
+    stderr: "",
+    write: [],
+  });
+});
+
+describe("resolves external configuration from package.json (esm file)", () => {
+  runPrettier("cli/config/external-config/esm-package", ["index.js"]).test({
+    status: 0,
+    stderr: "",
+    write: [],
   });
 });
 
@@ -232,13 +250,63 @@ test("API resolveConfig resolves relative path values based on config filepath",
 });
 
 test("API resolveConfig de-references to an external module", async () => {
-  const currentDir = path.join(__dirname, "../cli/config/external-config");
+  const config = { printWidth: 77, semi: false };
   await expect(
-    prettier.resolveConfig(`${currentDir}/index.js`)
-  ).resolves.toEqual({
-    printWidth: 77,
-    semi: false,
-  });
+    prettier.resolveConfig(
+      path.join(__dirname, "../cli/config/external-config/cjs-package/index.js")
+    )
+  ).resolves.toEqual(config);
+  await expect(
+    prettier.resolveConfig(
+      path.join(__dirname, "../cli/config/external-config/esm-package/index.js")
+    )
+  ).resolves.toEqual(config);
+  await expect(
+    prettier.resolveConfig(
+      path.join(__dirname, "../cli/config/external-config/esm-file/index.js")
+    )
+  ).resolves.toEqual(config);
+});
+
+test(".js config file", async () => {
+  const parentDirectory = path.join(__dirname, "../cli/config/rc-js");
+
+  const config = {
+    trailingComma: "all",
+    singleQuote: true,
+  };
+
+  for (const directoryName of [
+    "cjs-prettier-config-js-in-type-commonjs",
+    "cjs-prettier-config-js-in-type-none",
+    "cjs-prettierrc-js-in-type-commonjs",
+    "cjs-prettierrc-js-in-type-none",
+    "mjs-prettier-config-js-in-type-module",
+    "mjs-prettierrc-js-in-type-module",
+  ]) {
+    const file = path.join(parentDirectory, directoryName, "foo.js");
+    await expect(prettier.resolveConfig(file)).resolves.toMatchObject(config);
+  }
+
+  const cjsError = /module is not defined in ES module scope/;
+  for (const directoryName of [
+    "cjs-prettier-config-js-in-type-module",
+    "cjs-prettierrc-js-in-type-module",
+  ]) {
+    const file = path.join(parentDirectory, directoryName, "foo.js");
+    await expect(prettier.resolveConfig(file)).rejects.toThrow(cjsError);
+  }
+
+  const mjsError = /Unexpected token 'export'/;
+  for (const directoryName of [
+    "mjs-prettier-config-js-in-type-commonjs",
+    "mjs-prettier-config-js-in-type-none",
+    "mjs-prettierrc-js-in-type-commonjs",
+    "mjs-prettierrc-js-in-type-none",
+  ]) {
+    const file = path.join(parentDirectory, directoryName, "foo.js");
+    await expect(prettier.resolveConfig(file)).rejects.toThrow(mjsError);
+  }
 });
 
 test(".cjs config file", async () => {
@@ -258,7 +326,27 @@ test(".cjs config file", async () => {
     "prettier-config-cjs-in-type-module",
   ]) {
     const file = path.join(parentDirectory, directoryName, "foo.js");
+    await expect(prettier.resolveConfig(file)).resolves.toMatchObject(config);
+  }
+});
 
+test(".mjs config file", async () => {
+  const parentDirectory = path.join(__dirname, "../cli/config/rc-mjs");
+
+  const config = {
+    trailingComma: "all",
+    singleQuote: true,
+  };
+
+  for (const directoryName of [
+    "prettierrc-mjs-in-type-module",
+    "prettierrc-mjs-in-type-commonjs",
+    "prettierrc-mjs-in-type-none",
+    "prettier-config-mjs-in-type-commonjs",
+    "prettier-config-mjs-in-type-none",
+    "prettier-config-mjs-in-type-module",
+  ]) {
+    const file = path.join(parentDirectory, directoryName, "foo.js");
     await expect(prettier.resolveConfig(file)).resolves.toMatchObject(config);
   }
 });
@@ -271,7 +359,6 @@ test(".json5 config file", async () => {
     tabWidth: 3,
   };
   const file = path.join(parentDirectory, "json5/foo.js");
-
   await expect(prettier.resolveConfig(file)).resolves.toMatchObject(config);
 });
 
@@ -279,6 +366,5 @@ test(".json5 config file(invalid)", async () => {
   const parentDirectory = path.join(__dirname, "../cli/config/rc-json5");
   const file = path.join(parentDirectory, "invalid/foo.js");
   const error = /JSON5: invalid end of input at 2:1/;
-
   await expect(prettier.resolveConfig(file)).rejects.toThrow(error);
 });
diff --git a/tests/integration/__tests__/plugin-options-string.js b/tests/integration/__tests__/plugin-options-string.js
index 7de030322..36199c6b6 100644
--- a/tests/integration/__tests__/plugin-options-string.js
+++ b/tests/integration/__tests__/plugin-options-string.js
@@ -58,9 +58,7 @@ describe("Non exists plugin", () => {
     { input: "hello-world" }
   ).test({
     stdout: "",
-    stderr: expect.stringMatching(
-      /Cannot (?:resolve|find) module '--invalid--'/
-    ),
+    stderr: expect.stringMatching(/Cannot find module '--invalid--'/),
     status: 1,
     write: [],
   });
diff --git a/tests/integration/cli/config/external-config/index.js b/tests/integration/cli/config/external-config/cjs-package/index.js
similarity index 100%
rename from tests/integration/cli/config/external-config/index.js
rename to tests/integration/cli/config/external-config/cjs-package/index.js
diff --git a/tests/integration/cli/config/external-config/node_modules/@company/prettier-config/index.json b/tests/integration/cli/config/external-config/cjs-package/node_modules/@company/prettier-config/index.json
similarity index 100%
rename from tests/integration/cli/config/external-config/node_modules/@company/prettier-config/index.json
rename to tests/integration/cli/config/external-config/cjs-package/node_modules/@company/prettier-config/index.json
diff --git a/tests/integration/cli/config/external-config/node_modules/@company/prettier-config/package.json b/tests/integration/cli/config/external-config/cjs-package/node_modules/@company/prettier-config/package.json
similarity index 100%
rename from tests/integration/cli/config/external-config/node_modules/@company/prettier-config/package.json
rename to tests/integration/cli/config/external-config/cjs-package/node_modules/@company/prettier-config/package.json
diff --git a/tests/integration/cli/config/external-config/package.json b/tests/integration/cli/config/external-config/cjs-package/package.json
similarity index 100%
rename from tests/integration/cli/config/external-config/package.json
rename to tests/integration/cli/config/external-config/cjs-package/package.json
diff --git a/tests/integration/cli/config/external-config/esm-file/index.js b/tests/integration/cli/config/external-config/esm-file/index.js
new file mode 100644
index 000000000..b4639445c
--- /dev/null
+++ b/tests/integration/cli/config/external-config/esm-file/index.js
@@ -0,0 +1 @@
+console.log("should have no semi");
diff --git a/tests/integration/cli/config/external-config/esm-file/my-prettier-config-file.js b/tests/integration/cli/config/external-config/esm-file/my-prettier-config-file.js
new file mode 100644
index 000000000..c8fc71441
--- /dev/null
+++ b/tests/integration/cli/config/external-config/esm-file/my-prettier-config-file.js
@@ -0,0 +1,4 @@
+export default {
+  printWidth: 77,
+  semi: false,
+};
diff --git a/tests/integration/cli/config/external-config/esm-file/package.json b/tests/integration/cli/config/external-config/esm-file/package.json
new file mode 100644
index 000000000..93334b676
--- /dev/null
+++ b/tests/integration/cli/config/external-config/esm-file/package.json
@@ -0,0 +1,5 @@
+{
+  "prettier": "./my-prettier-config-file.js",
+  "private": true,
+  "type": "module"
+}
diff --git a/tests/integration/cli/config/external-config/esm-package/index.js b/tests/integration/cli/config/external-config/esm-package/index.js
new file mode 100644
index 000000000..b4639445c
--- /dev/null
+++ b/tests/integration/cli/config/external-config/esm-package/index.js
@@ -0,0 +1 @@
+console.log("should have no semi");
diff --git a/tests/integration/cli/config/external-config/esm-package/node_modules/@company/prettier-config/index.js b/tests/integration/cli/config/external-config/esm-package/node_modules/@company/prettier-config/index.js
new file mode 100644
index 000000000..09f9623fc
--- /dev/null
+++ b/tests/integration/cli/config/external-config/esm-package/node_modules/@company/prettier-config/index.js
@@ -0,0 +1,4 @@
+export default {
+  "printWidth": 77,
+  "semi": false
+}
diff --git a/tests/integration/cli/config/external-config/esm-package/node_modules/@company/prettier-config/package.json b/tests/integration/cli/config/external-config/esm-package/node_modules/@company/prettier-config/package.json
new file mode 100644
index 000000000..fb040ee6e
--- /dev/null
+++ b/tests/integration/cli/config/external-config/esm-package/node_modules/@company/prettier-config/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "@company/prettier-config",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "exports": "./index.js"
+}
diff --git a/tests/integration/cli/config/external-config/esm-package/package.json b/tests/integration/cli/config/external-config/esm-package/package.json
new file mode 100644
index 000000000..58ab00285
--- /dev/null
+++ b/tests/integration/cli/config/external-config/esm-package/package.json
@@ -0,0 +1,3 @@
+{
+  "prettier": "@company/prettier-config"
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-commonjs/package.json b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-commonjs/package.json
new file mode 100644
index 000000000..f2ce3c95d
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-commonjs/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "cjs-prettier-config-js-in-type-commonjs",
+  "private": true,
+  "type": "commonjs"
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-commonjs/prettier.config.js b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-commonjs/prettier.config.js
new file mode 100644
index 000000000..dcea73b27
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-commonjs/prettier.config.js
@@ -0,0 +1,6 @@
+"use strict";
+
+module.exports = {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-module/package.json b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-module/package.json
new file mode 100644
index 000000000..47908701a
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-module/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "cjs-prettier-config-js-in-type-module",
+  "private": true,
+  "type": "module"
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-module/prettier.config.js b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-module/prettier.config.js
new file mode 100644
index 000000000..0310f4895
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-module/prettier.config.js
@@ -0,0 +1,4 @@
+module.exports = {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-none/package.json b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-none/package.json
new file mode 100644
index 000000000..ab34267d3
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-none/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "cjs-prettier-config-js-in-type-none",
+  "private": true
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-none/prettier.config.js b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-none/prettier.config.js
new file mode 100644
index 000000000..dcea73b27
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettier-config-js-in-type-none/prettier.config.js
@@ -0,0 +1,6 @@
+"use strict";
+
+module.exports = {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-commonjs/.prettierrc.js b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-commonjs/.prettierrc.js
new file mode 100644
index 000000000..dcea73b27
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-commonjs/.prettierrc.js
@@ -0,0 +1,6 @@
+"use strict";
+
+module.exports = {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-commonjs/package.json b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-commonjs/package.json
new file mode 100644
index 000000000..622710c7b
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-commonjs/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "cjs-prettierrc-js-in-type-commonjs",
+  "private": true,
+  "type": "commonjs"
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-module/.prettierrc.js b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-module/.prettierrc.js
new file mode 100644
index 000000000..dcea73b27
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-module/.prettierrc.js
@@ -0,0 +1,6 @@
+"use strict";
+
+module.exports = {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-module/package.json b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-module/package.json
new file mode 100644
index 000000000..ad68a5cba
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-module/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "cjs-prettierrc-js-in-type-module",
+  "private": true,
+  "type": "module"
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-none/.prettierrc.js b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-none/.prettierrc.js
new file mode 100644
index 000000000..dcea73b27
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-none/.prettierrc.js
@@ -0,0 +1,6 @@
+"use strict";
+
+module.exports = {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-none/package.json b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-none/package.json
new file mode 100644
index 000000000..1e73e4349
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/cjs-prettierrc-js-in-type-none/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "prettierrc-js-in-type-none",
+  "private": true
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-commonjs/package.json b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-commonjs/package.json
new file mode 100644
index 000000000..177552693
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-commonjs/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "mjs-prettier-config-js-in-type-commonjs",
+  "private": true,
+  "type": "commonjs"
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-commonjs/prettier.config.js b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-commonjs/prettier.config.js
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-commonjs/prettier.config.js
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-module/package.json b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-module/package.json
new file mode 100644
index 000000000..bc7900e3a
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-module/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "mjs-prettier-config-js-in-type-module",
+  "private": true,
+  "type": "module"
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-module/prettier.config.js b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-module/prettier.config.js
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-module/prettier.config.js
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-none/package.json b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-none/package.json
new file mode 100644
index 000000000..8787c2ede
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-none/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "mjs-prettier-config-js-in-type-none",
+  "private": true
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-none/prettier.config.js b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-none/prettier.config.js
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettier-config-js-in-type-none/prettier.config.js
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-commonjs/.prettierrc.js b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-commonjs/.prettierrc.js
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-commonjs/.prettierrc.js
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-commonjs/package.json b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-commonjs/package.json
new file mode 100644
index 000000000..a3faf105c
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-commonjs/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "mjs-prettierrc-js-in-type-commonjs",
+  "private": true,
+  "type": "commonjs"
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-module/.prettierrc.js b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-module/.prettierrc.js
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-module/.prettierrc.js
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-module/package.json b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-module/package.json
new file mode 100644
index 000000000..e8a749525
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-module/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "mjs-prettierrc-js-in-type-module",
+  "private": true,
+  "type": "module"
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-none/.prettierrc.js b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-none/.prettierrc.js
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-none/.prettierrc.js
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-none/package.json b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-none/package.json
new file mode 100644
index 000000000..0583e76e4
--- /dev/null
+++ b/tests/integration/cli/config/rc-js/mjs-prettierrc-js-in-type-none/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "mjs-prettierrc-js-in-type-none",
+  "private": true
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-commonjs/package.json b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-commonjs/package.json
new file mode 100644
index 000000000..194da1d28
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-commonjs/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "prettier-config-mjs-in-type-commonjs",
+  "private": true,
+  "type": "commonjs"
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-commonjs/prettier.config.mjs b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-commonjs/prettier.config.mjs
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-commonjs/prettier.config.mjs
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-module/package.json b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-module/package.json
new file mode 100644
index 000000000..94f8379c9
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-module/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "prettier-config-mjs-in-type-module",
+  "private": true,
+  "type": "module"
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-module/prettier.config.mjs b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-module/prettier.config.mjs
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-module/prettier.config.mjs
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-none/package.json b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-none/package.json
new file mode 100644
index 000000000..86189ffcf
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-none/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "prettier-config-mjs-in-type-none",
+  "private": true
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-none/prettier.config.mjs b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-none/prettier.config.mjs
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettier-config-mjs-in-type-none/prettier.config.mjs
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-commonjs/.prettierrc.mjs b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-commonjs/.prettierrc.mjs
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-commonjs/.prettierrc.mjs
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-commonjs/package.json b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-commonjs/package.json
new file mode 100644
index 000000000..b3e79661d
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-commonjs/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "prettierrc-mjs-in-type-commonjs",
+  "private": true,
+  "type": "commonjs"
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-module/.prettierrc.mjs b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-module/.prettierrc.mjs
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-module/.prettierrc.mjs
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-module/package.json b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-module/package.json
new file mode 100644
index 000000000..f0fe03436
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-module/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "prettierrc-mjs-in-type-module",
+  "private": true,
+  "type": "module"
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-none/.prettierrc.mjs b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-none/.prettierrc.mjs
new file mode 100644
index 000000000..867b88006
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-none/.prettierrc.mjs
@@ -0,0 +1,4 @@
+export default {
+  "trailingComma": "all",
+  "singleQuote": true
+}
diff --git a/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-none/package.json b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-none/package.json
new file mode 100644
index 000000000..b494509c0
--- /dev/null
+++ b/tests/integration/cli/config/rc-mjs/prettierrc-mjs-in-type-none/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "prettierrc-mjs-in-type-none",
+  "private": true
+}
diff --git a/yarn.lock b/yarn.lock
index 965ead0ee..3f7fb1587 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2105,6 +2105,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"builtins@npm:^5.0.0":
+  version: 5.0.1
+  resolution: "builtins@npm:5.0.1"
+  dependencies:
+    semver: ^7.0.0
+  checksum: 66d204657fe36522822a95b288943ad11b58f5eaede235b11d8c4edaa28ce4800087d44a2681524c340494aadb120a0068011acabe99d30e8f11a7d826d83515
+  languageName: node
+  linkType: hard
+
 "c8@npm:7.12.0":
   version: 7.12.0
   resolution: "c8@npm:7.12.0"
@@ -4384,6 +4393,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"import-meta-resolve@npm:2.0.3":
+  version: 2.0.3
+  resolution: "import-meta-resolve@npm:2.0.3"
+  dependencies:
+    builtins: ^5.0.0
+  checksum: 3a0cc2f50b04e766712a7c60f1136c89c2d0cdd49bbbf8b810a6f1b0985cd3e897988d99bf6ce46103589806e6ba3e0d12b68f1e6bb51032beef3a2c2defd52e
+  languageName: node
+  linkType: hard
+
 "imurmurhash@npm:^0.1.4":
   version: 0.1.4
   resolution: "imurmurhash@npm:0.1.4"
@@ -6812,6 +6830,7 @@ __metadata:
     html-tag-names: 2.0.1
     html-void-elements: 2.0.1
     ignore: 5.2.0
+    import-meta-resolve: 2.0.3
     jest: 28.1.0
     jest-docblock: 28.1.1
     jest-light-runner: "fisker/jest-light-runner#b5e893d3a7d301bfb5d68ed81eebadbe2bb0577d"