Improve @babel/runtime esm stability (#12883)

.eslintignore

@@ -26,3 +26,6 @@ packages/babel-parser/test/expressions
 eslint/*/lib
 eslint/*/node_modules
 eslint/*/test/fixtures
+
+test/runtime-integration/*/output.js
+test/runtime-integration/*/output-absolute.js

.flowconfig

@@ -5,6 +5,8 @@
 <PROJECT_ROOT>/codemods/.*/lib
 <PROJECT_ROOT>/codemods/.*/test
 <PROJECT_ROOT>/node_modules/module-deps/
+<PROJECT_ROOT>/node_modules/webpack-cli/
+<PROJECT_ROOT>/test/runtime-integration/
 
 [include]
 packages/*/src

.github/workflows/ci.yml

@@ -269,3 +269,84 @@ jobs:
         run: make test-flow
       - name: Run TypeScript Tests
         run: make test-typescript
+
+  runtime-interop:
+    name: Test @babel/runtime integrations
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Use Node.js latest
+        uses: actions/setup-node@v2-beta
+        with:
+          node-version: "*"
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
+      - uses: actions/cache@v2
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: yarn-${{ hashFiles('yarn.lock') }}
+      - name: Install
+        run: yarn install
+      - uses: actions/download-artifact@v2
+        with:
+          name: babel-artifact
+      - name: Generate runtime helpers
+        run: |
+          make build-plugin-transform-runtime-dist
+      - name: Generate absoluteRuntime tests
+        run: yarn test:runtime:generate-absolute-runtime
+      - name: Test bundlers
+        run: yarn test:runtime:bundlers
+      - name: Test Node.js
+        run: yarn test:runtime:node
+      - name: Use Node.js 10
+        uses: actions/setup-node@v2-beta
+        with:
+          node-version: 10
+      - name: Test Node.js 10
+        run: yarn test:runtime:node
+      - name: Use Node.js 12.0
+        uses: actions/setup-node@v2-beta
+        with:
+          node-version: "12.0" # quoted, otherwise it's just 13
+      - name: Test Node.js 12.0
+        run: yarn test:runtime:node
+      - name: Use Node.js 12.17
+        uses: actions/setup-node@v2-beta
+        with:
+          node-version: 12.17
+      - name: Test Node.js  12.17
+        run: yarn test:runtime:node
+      - name: Use Node.js 13.0
+        uses: actions/setup-node@v2-beta
+        with:
+          node-version: "13.0" # quoted, otherwise it's just 13
+      - name: Test Node.js 13.0
+        run: yarn test:runtime:node
+      # - name: Use Node.js 13.2
+      #   uses: actions/setup-node@v2-beta
+      #   with:
+      #     node-version: 13.2
+      # - name: Test Node.js 13.2
+      #   run: yarn test:runtime:node
+      # - name: Use Node.js 13.6
+      #   uses: actions/setup-node@v2-beta
+      #   with:
+      #     node-version: 13.6
+      # - name: Test Node.js 13.6
+      #   run: yarn test:runtime:node
+      - name: Use Node.js 13.7
+        uses: actions/setup-node@v2-beta
+        with:
+          node-version: 13.7
+      - name: Test Node.js 13.7
+        run: yarn test:runtime:node
+      - name: Use Node.js 14.2
+        uses: actions/setup-node@v2-beta
+        with:
+          node-version: 14.2
+      - name: Test Node.js 14.2
+        run: yarn test:runtime:node

.gitignore

@@ -79,3 +79,6 @@ packages/babel-standalone/babel.min.js
 
 tsconfig.json
 tsconfig.tsbuildinfo
+
+/test/runtime-integration/*/output.js
+/test/runtime-integration/*/absolute-output.js

package.json

@@ -12,7 +12,10 @@
     "lint": "make lint",
     "test": "make test",
     "version": "yarn --immutable-cache && git add yarn.lock",
-    "test:esm": "node test/esm/index.js"
+    "test:esm": "node test/esm/index.js",
+    "test:runtime:generate-absolute-runtime": "node test/runtime-integration/generate-absolute-runtime.cjs",
+    "test:runtime:bundlers": "node test/runtime-integration/bundlers.cjs",
+    "test:runtime:node": "node test/runtime-integration/node.cjs"
   },
   "devDependencies": {
     "@babel/cli": "^7.12.0",
@@ -73,7 +76,8 @@
     "codemods/*",
     "eslint/*",
     "packages/*",
-    "test/esm"
+    "test/esm",
+    "test/runtime-integration/*"
   ],
   "resolutions": {
     "browserslist": "npm:4.14.5",

packages/babel-plugin-transform-runtime/scripts/build-dist.js

@@ -248,6 +248,7 @@ function buildHelper(
       [transformRuntime, { corejs, version: runtimeVersion }],
       buildRuntimeRewritePlugin(runtimeName, helperName),
       esm ? null : addDefaultCJSExport,
+      esm ? useRelativeImports : null,
     ].filter(Boolean),
     overrides: [
       {
@@ -318,3 +319,18 @@ function addDefaultCJSExport({ template }) {
     },
   };
 }
+
+function useRelativeImports() {
+  const RE = /^@babel\/runtime(?:-corejs[23])?\/helpers\/(?<name>.+)$/;
+
+  return {
+    visitor: {
+      ImportDeclaration(path) {
+        path.node.source.value = path.node.source.value.replace(
+          RE,
+          "../$<name>/_index.mjs"
+        );
+      },
+    },
+  };
+}

packages/babel-plugin-transform-runtime/src/index.js

@@ -88,13 +88,6 @@ export default declare((api, options, dirname) => {
   // TODO(Babel 8): Remove this check, it's always true
   const DUAL_MODE_RUNTIME = "7.13.0";
   const supportsCJSDefault = hasMinVersion(DUAL_MODE_RUNTIME, runtimeVersion);
-  if (supportsCJSDefault && useESModules && !absoluteRuntime) {
-    console.warn(
-      `[@babel/plugin-transform-runtime] The 'useESModules' option is not necessary when using` +
-        ` a @babel/runtime version >= ${DUAL_MODE_RUNTIME} and not using the 'absoluteRuntime'` +
-        ` option, because it automatically detects the necessary module format.`,
-    );
-  }
 
   function has(obj, key) {
     return Object.prototype.hasOwnProperty.call(obj, key);

packages/babel-plugin-transform-runtime/test/fixtures/dual-babel-runtime/useESModules-modern-runtime/stderr.txt

@@ -1 +0,0 @@
-[@babel/plugin-transform-runtime] The 'useESModules' option is not necessary when using a @babel/runtime version >= 7.13.0 and not using the 'absoluteRuntime' option, because it automatically detects the necessary module format.

packages/babel-runtime-corejs2/helpers/temporalRef/_index.mjs

@@ -1,5 +1,5 @@
-import undef from "@babel/runtime-corejs2/helpers/temporalUndefined";
+import undef from "../temporalUndefined/_index.mjs";
-import err from "@babel/runtime-corejs2/helpers/tdz";
+import err from "../tdz/_index.mjs";
 export default function _temporalRef(val, name) {
   return val === undef ? err(name) : val;
 }

packages/babel-runtime-corejs2/helpers/toArray/_index.mjs

@@ -1,7 +1,7 @@
-import arrayWithHoles from "@babel/runtime-corejs2/helpers/arrayWithHoles";
+import arrayWithHoles from "../arrayWithHoles/_index.mjs";
-import iterableToArray from "@babel/runtime-corejs2/helpers/iterableToArray";
+import iterableToArray from "../iterableToArray/_index.mjs";
-import unsupportedIterableToArray from "@babel/runtime-corejs2/helpers/unsupportedIterableToArray";
+import unsupportedIterableToArray from "../unsupportedIterableToArray/_index.mjs";
-import nonIterableRest from "@babel/runtime-corejs2/helpers/nonIterableRest";
+import nonIterableRest from "../nonIterableRest/_index.mjs";
 export default function _toArray(arr) {
   return arrayWithHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableRest();
 }

packages/babel-runtime/helpers/temporalRef/_index.mjs

@@ -1,5 +1,5 @@
-import undef from "@babel/runtime/helpers/temporalUndefined";
+import undef from "../temporalUndefined/_index.mjs";
-import err from "@babel/runtime/helpers/tdz";
+import err from "../tdz/_index.mjs";
 export default function _temporalRef(val, name) {
   return val === undef ? err(name) : val;
 }

packages/babel-runtime/helpers/toArray/_index.mjs

@@ -1,7 +1,7 @@
-import arrayWithHoles from "@babel/runtime/helpers/arrayWithHoles";
+import arrayWithHoles from "../arrayWithHoles/_index.mjs";
-import iterableToArray from "@babel/runtime/helpers/iterableToArray";
+import iterableToArray from "../iterableToArray/_index.mjs";
-import unsupportedIterableToArray from "@babel/runtime/helpers/unsupportedIterableToArray";
+import unsupportedIterableToArray from "../unsupportedIterableToArray/_index.mjs";
-import nonIterableRest from "@babel/runtime/helpers/nonIterableRest";
+import nonIterableRest from "../nonIterableRest/_index.mjs";
 export default function _toArray(arr) {
   return arrayWithHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableRest();
 }

test/runtime-integration/bundlers.cjs

@@ -0,0 +1,48 @@
+const cp = require("child_process");
+const path = require("path");
+const fs = require("fs");
+
+for (const absolute of [false, true]) {
+  const output = absolute ? "output-absolute.js" : "output.js";
+  const title = absolute ? "(absolute runtime)" : "";
+
+  const webpack = absolute
+    ? "webpack --config webpack.absolute.config.js"
+    : "webpack";
+  const rollup = absolute ? "rollup -c rollup.absolute.config.js" : "rollup -c";
+
+  // TODO: This never worked in any Babel version
+  if (!absolute) {
+    test(`Webpack 5 ${title}`, webpack, "webpack-5", output, true);
+  }
+  test(`Webpack 4 ${title}`, webpack, "webpack-4", output);
+  test(`Webpack 3 ${title}`, webpack, "webpack-3", output);
+  test(`Rollup ${title}`, rollup, "rollup", output);
+}
+
+function test(name, command, directory, output, first) {
+  console.log(`Building with ${name}`);
+  cp.execSync(`yarn ${command}`, {
+    cwd: path.join(__dirname, directory),
+    encoding: "utf8",
+  });
+  console.log(`Testing the ${name} bundle`);
+  const out = cp.execSync(`node ${output}`, {
+    cwd: path.join(__dirname, directory),
+    encoding: "utf8",
+  });
+
+  const expectedPath = path.join(__dirname, "expected-bundler.txt");
+  let expected = fs.readFileSync(expectedPath, "utf8");
+
+  if (expected === out) {
+    console.log("OK");
+  } else if (first && process.env.OVERWRITE) {
+    fs.writeFileSync(expectedPath, out);
+    expected = out;
+    console.log("UPDATED");
+  } else {
+    console.error("FAILED\n");
+    console.error(out);
+  }
+}

test/runtime-integration/expected-bundler-absolute.txt

@@ -0,0 +1,20 @@
+================== import - auto ====================
+typeof inheritsLoose: function
+A.__proto__ === B true
+================= import - esm ======================
+typeof toArray: function
+arr: 1,2,3
+=============== import - corejs ====================
+typeof Set: function
+arr: 1,2,3
+================= require - auto ====================
+typeof objectWithoutProperties: function
+typeof objectWithoutProperties.default: function
+obj: { b: 2, [Symbol(Symbol.toStringTag)]: 5 }
+================= require - esm =====================
+typeof toPrimitive: object
+typeof toPrimitive.default: function
+Value: 2
+=============== require - corejs ====================
+typeof Set: function
+arr: 1,2,3

test/runtime-integration/expected-bundler.txt

@@ -0,0 +1,20 @@
+================== import - auto ====================
+typeof inheritsLoose: function
+A.__proto__ === B true
+================= import - esm ======================
+typeof toArray: function
+arr: 1,2,3
+=============== import - corejs ====================
+typeof Set: function
+arr: 1,2,3
+================= require - auto ====================
+typeof objectWithoutProperties: function
+typeof objectWithoutProperties.default: function
+obj: { b: 2, [Symbol(Symbol.toStringTag)]: 5 }
+================= require - esm =====================
+typeof toPrimitive: object
+typeof toPrimitive.default: function
+Value: 2
+=============== require - corejs ====================
+typeof Set: function
+arr: 1,2,3

test/runtime-integration/expected-cjs-10.txt

@@ -0,0 +1,9 @@
+================= require - auto ====================
+typeof objectWithoutProperties: function
+typeof objectWithoutProperties.default: function
+obj: { b: 2, [Symbol(Symbol.toStringTag)]: 5 }
+================= require - esm =====================
+Error: Unexpected token export
+=============== require - corejs ====================
+typeof Set: function
+arr: 1,2,3

test/runtime-integration/expected-cjs-absolute-10.txt

@@ -0,0 +1,9 @@
+================= require - auto ====================
+typeof objectWithoutProperties: function
+typeof objectWithoutProperties.default: function
+obj: { b: 2, [Symbol(Symbol.toStringTag)]: 5 }
+================= require - esm =====================
+Error: Unexpected token export
+=============== require - corejs ====================
+typeof Set: function
+arr: 1,2,3

test/runtime-integration/expected-cjs-absolute-13.0.txt

@@ -0,0 +1,9 @@
+================= require - auto ====================
+typeof objectWithoutProperties: function
+typeof objectWithoutProperties.default: function
+obj: { b: 2, [Symbol(Symbol.toStringTag)]: 5 }
+================= require - esm =====================
+Error: Unexpected token 'export'
+=============== require - corejs ====================
+typeof Set: function
+arr: 1,2,3

test/runtime-integration/expected-cjs-absolute.txt

@@ -0,0 +1,13 @@
+================= require - auto ====================
+typeof objectWithoutProperties: function
+typeof objectWithoutProperties.default: function
+obj: { b: 2, [Symbol(Symbol.toStringTag)]: 5 }
+================= require - esm =====================
+Error: Must use import to load ES Module: <ROOT>/packages/babel-runtime/helpers/esm/toPrimitive.js
+require() of ES modules is not supported.
+require() of <ROOT>/packages/babel-runtime/helpers/esm/toPrimitive.js from <ROOT>/test/runtime-integration/src/absolute/require-esm.cjs is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
+Instead rename toPrimitive.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from <ROOT>/packages/babel-runtime/helpers/esm/package.json.
+
+=============== require - corejs ====================
+typeof Set: function
+arr: 1,2,3

test/runtime-integration/expected-cjs.txt

@@ -0,0 +1,9 @@
+================= require - auto ====================
+typeof objectWithoutProperties: function
+typeof objectWithoutProperties.default: function
+obj: { b: 2, [Symbol(Symbol.toStringTag)]: 5 }
+================= require - esm =====================
+Error: Must use import to load ES Module: <ROOT>/packages/babel-runtime/helpers/toPrimitive/_index.mjs
+=============== require - corejs ====================
+typeof Set: function
+arr: 1,2,3

test/runtime-integration/expected-esm.txt

@@ -0,0 +1,18 @@
+================== import - auto ====================
+typeof inheritsLoose: function
+A.__proto__ === B true
+================= import - esm ======================
+typeof toArray: function
+arr: 1,2,3
+=============== import - corejs ====================
+typeof Set: function
+arr: 1,2,3
+================= require - auto ====================
+typeof objectWithoutProperties: function
+typeof objectWithoutProperties.default: function
+obj: { b: 2, [Symbol(Symbol.toStringTag)]: 5 }
+================= require - esm =====================
+Error: Must use import to load ES Module: <ROOT>/packages/babel-runtime/helpers/toPrimitive/_index.mjs
+=============== require - corejs ====================
+typeof Set: function
+arr: 1,2,3

test/runtime-integration/generate-absolute-runtime.cjs

@@ -0,0 +1,19 @@
+const fs = require("fs");
+const path = require("path");
+
+const runtimePath = path.resolve(__dirname, "../../packages/babel-runtime");
+const runtimeCorejs3Path = path.resolve(
+  __dirname,
+  "../../packages/babel-runtime-corejs3"
+);
+const input = path.resolve(__dirname, "src");
+
+for (const file of fs.readdirSync(input)) {
+  if (!/\.[cm]js$/.test(file)) continue;
+
+  let contents = fs.readFileSync(path.join(input, file), "utf8");
+  contents = contents.replace("@babel/runtime-corejs3", runtimeCorejs3Path);
+  contents = contents.replace("@babel/runtime", runtimePath);
+
+  fs.writeFileSync(path.resolve(input, "absolute", file), contents);
+}

test/runtime-integration/node.cjs

@@ -0,0 +1,65 @@
+const cp = require("child_process");
+const path = require("path");
+const fs = require("fs");
+
+const [major, minor] = process.versions.node.split(".").map(n => +n);
+
+if (major > 12 || (major === 12 && minor >= 17)) {
+  test("ESM", "--experimental-modules ./src/main-esm.mjs", "expected-esm.txt");
+  // TODO: This never worked in any Babel version
+  // test("ESM - absoluteRuntime", "--esperimental-modules ./src/absolute/main-esm.mjs", "expected-esm-absolute.txt");
+}
+
+const expectedCjs =
+  major === 10 || (major === 12 && minor < 12.17)
+    ? "expected-cjs-10.txt"
+    : "expected-cjs.txt";
+
+test("CJS", "./src/main-cjs.cjs", expectedCjs);
+
+const expectedCjsAbsolute =
+  major === 10 || (major === 12 && minor < 12.17)
+    ? "expected-cjs-absolute-10.txt"
+    : major === 13 && minor <= 1
+    ? "expected-cjs-absolute-13.0.txt"
+    : "expected-cjs-absolute.txt";
+
+test(
+  "CJS - absoluteRuntime",
+  "./src/absolute/main-cjs.cjs",
+  expectedCjsAbsolute
+);
+
+function test(title, command, expectedName) {
+  const expectedPath = path.join(__dirname, expectedName);
+  const expected = fs.readFileSync(expectedPath, "utf8");
+
+  console.log(`Testing with Node.js ${process.version} - ${title}`);
+  const out = normalize(
+    cp.execSync(`node ${command}`, {
+      cwd: __dirname,
+      encoding: "utf8",
+    })
+  );
+
+  if (expected === out) {
+    console.log("OK");
+  } else if (process.env.OVERWRITE) {
+    fs.writeFileSync(expectedPath, out);
+    console.log("UPDATED");
+  } else {
+    console.error("FAILED\n\n");
+    console.error(out);
+    process.exitCode = 1;
+  }
+  console.log("\n");
+}
+
+function normalize(output) {
+  const root = path.resolve(__dirname, "../..");
+  let next;
+  while ((next = output.replace(root, "<ROOT>")) !== output) {
+    output = next;
+  }
+  return output;
+}

test/runtime-integration/rollup/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "@babel-internal/runtime-integration-rollup",
+  "private": true,
+  "devDependencies": {
+    "@babel/runtime": "workspace:*",
+    "@rollup/plugin-commonjs": "^17.1.0",
+    "@rollup/plugin-node-resolve": "^11.2.0",
+    "rollup": "^2.39.1"
+  }
+}

test/runtime-integration/rollup/rollup.absolute.config.js

@@ -0,0 +1,13 @@
+import commonjs from "@rollup/plugin-commonjs";
+import nodeResolve from "@rollup/plugin-node-resolve";
+import path from "path";
+
+export default {
+  input: path.resolve(__dirname, "../src/absolute/main-esm.mjs"),
+  plugins: [commonjs(), nodeResolve()],
+
+  output: {
+    file: path.resolve(__dirname, "output-absolute.js"),
+    format: "cjs",
+  },
+};

test/runtime-integration/rollup/rollup.config.js

@@ -0,0 +1,13 @@
+import commonjs from "@rollup/plugin-commonjs";
+import nodeResolve from "@rollup/plugin-node-resolve";
+import path from "path";
+
+export default {
+  input: path.resolve(__dirname, "../src/main-esm.mjs"),
+  plugins: [commonjs(), nodeResolve()],
+
+  output: {
+    file: path.resolve(__dirname, "output.js"),
+    format: "cjs",
+  },
+};

test/runtime-integration/src/absolute/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

test/runtime-integration/src/import-auto.mjs

@@ -0,0 +1,10 @@
+import inheritsLoose from "@babel/runtime/helpers/inheritsLoose";
+
+console.log("================== import - auto ====================");
+console.log("typeof inheritsLoose:", typeof inheritsLoose);
+
+function A() {}
+function B() {}
+inheritsLoose(A, B);
+
+console.log("A.__proto__ === B", A.__proto__ === B);

test/runtime-integration/src/import-corejs.mjs

@@ -0,0 +1,7 @@
+import Set from "@babel/runtime-corejs3/core-js/set.js";
+
+console.log("=============== import - corejs ====================");
+console.log("typeof Set:", typeof Set);
+
+const arr = Array.from(new Set([1, 2, 3]));
+console.log("arr:", arr.toString());

test/runtime-integration/src/import-esm.mjs

@@ -0,0 +1,8 @@
+import toArray from "@babel/runtime/helpers/esm/toArray";
+
+console.log("================= import - esm ======================");
+console.log("typeof toArray:", typeof toArray);
+
+const arr = toArray(new Set([1, 2, 3]));
+
+console.log("arr:", arr.toString());

test/runtime-integration/src/main-cjs.cjs

@@ -0,0 +1,3 @@
+require("./require-auto.cjs");
+require("./require-esm.cjs");
+require("./require-corejs.cjs");

test/runtime-integration/src/main-esm.mjs

@@ -0,0 +1,6 @@
+import "./import-auto.mjs";
+import "./import-esm.mjs";
+import "./import-corejs.mjs";
+import "./require-auto.cjs";
+import "./require-esm.cjs";
+import "./require-corejs.cjs";

test/runtime-integration/src/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "@babel-internal/runtime-integration-src",
+  "private": true,
+  "devDependencies": {
+    "@babel/runtime": "workspace:*",
+    "@babel/runtime-corejs3": "workspace:*"
+  }
+}

test/runtime-integration/src/require-auto.cjs

@@ -0,0 +1,14 @@
+const objectWithoutProperties = require("@babel/runtime/helpers/objectWithoutProperties");
+
+console.log("================= require - auto ====================");
+console.log("typeof objectWithoutProperties:", typeof objectWithoutProperties);
+console.log(
+  "typeof objectWithoutProperties.default:",
+  typeof objectWithoutProperties.default
+);
+
+const obj = objectWithoutProperties(
+  { a: 1, b: 2, c: 3, [Symbol.iterator]: 4, [Symbol.toStringTag]: 5 },
+  ["a", "c", Symbol.iterator]
+);
+console.log("obj:", obj);

test/runtime-integration/src/require-corejs.cjs

@@ -0,0 +1,7 @@
+const Set = require("@babel/runtime-corejs3/core-js/set.js");
+
+console.log("=============== require - corejs ====================");
+console.log("typeof Set:", typeof Set);
+
+const arr = Array.from(new Set([1, 2, 3]));
+console.log("arr:", arr.toString());

test/runtime-integration/src/require-esm.cjs

@@ -0,0 +1,13 @@
+console.log("================= require - esm =====================");
+
+try {
+  const toPrimitive = require("@babel/runtime/helpers/esm/toPrimitive");
+
+  console.log("typeof toPrimitive:", typeof toPrimitive);
+  console.log("typeof toPrimitive.default:", typeof toPrimitive.default);
+
+  const value = toPrimitive.default({ valueOf: () => 2 });
+  console.log("Value:", value);
+} catch (error) {
+  console.log("Error:", error.message);
+}

test/runtime-integration/webpack-3/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "@babel-internal/runtime-integration-webpack-3",
+  "private": true,
+  "devDependencies": {
+    "@babel/runtime": "workspace:*",
+    "webpack": "^3.12.0"
+  }
+}

test/runtime-integration/webpack-3/webpack.absolute.config.js

@@ -0,0 +1,11 @@
+const path = require("path");
+
+module.exports = {
+  entry: path.join(__dirname, "../src/absolute/main-esm.mjs"),
+  output: {
+    path: __dirname,
+    filename: "output-absolute.js",
+  },
+
+  devtool: false,
+};

test/runtime-integration/webpack-3/webpack.config.js

@@ -0,0 +1,11 @@
+const path = require("path");
+
+module.exports = {
+  entry: path.join(__dirname, "../src/main-esm.mjs"),
+  output: {
+    path: __dirname,
+    filename: "output.js",
+  },
+
+  devtool: false,
+};

test/runtime-integration/webpack-4/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "@babel-internal/runtime-integration-webpack-4",
+  "private": true,
+  "devDependencies": {
+    "@babel/runtime": "workspace:*",
+    "webpack": "^4.46.0",
+    "webpack-cli": "^4.5.0"
+  }
+}

test/runtime-integration/webpack-4/webpack.absolute.config.js

@@ -0,0 +1,13 @@
+const path = require("path");
+
+module.exports = {
+  mode: "development",
+
+  entry: path.join(__dirname, "../src/absolute/main-esm.mjs"),
+  output: {
+    path: __dirname,
+    filename: "output-absolute.js",
+  },
+
+  devtool: false,
+};

test/runtime-integration/webpack-4/webpack.config.js

@@ -0,0 +1,13 @@
+const path = require("path");
+
+module.exports = {
+  mode: "development",
+
+  entry: path.join(__dirname, "../src/main-esm.mjs"),
+  output: {
+    path: __dirname,
+    filename: "output.js",
+  },
+
+  devtool: false,
+};

test/runtime-integration/webpack-5/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "@babel-internal/runtime-integration-webpack-5",
+  "private": true,
+  "exports": "./index.js",
+  "devDependencies": {
+    "@babel/runtime": "workspace:*",
+    "webpack": "^5.24.1",
+    "webpack-cli": "^4.5.0"
+  }
+}

test/runtime-integration/webpack-5/webpack.absolute.config.js

@@ -0,0 +1,13 @@
+const path = require("path");
+
+module.exports = {
+  mode: "development",
+
+  entry: path.join(__dirname, "../src/absolute/main-esm.mjs"),
+  output: {
+    path: __dirname,
+    filename: "output-absolute.js",
+  },
+
+  devtool: false,
+};

test/runtime-integration/webpack-5/webpack.config.js

@@ -0,0 +1,13 @@
+const path = require("path");
+
+module.exports = {
+  mode: "development",
+
+  entry: path.join(__dirname, "../src/main-esm.mjs"),
+  output: {
+    path: __dirname,
+    filename: "output.js",
+  },
+
+  devtool: false,
+};