Align named imports behavior in .mjs and .js files

packages/babel-plugin-transform-modules-commonjs/src/index.ts

@@ -19,13 +19,14 @@ export default declare((api, options) => {
   const transformImportCall = createDynamicImportTransform(api);
 
   const {
-    // 'true' for non-mjs files to strictly have .default, instead of having
-    // destructuring-like behavior for their properties.
+    // 'true' for imports to strictly have .default, instead of having
+    // destructuring-like behavior for their properties. This matches the behavior
+    // of the initial Node.js (v12) behavior when importing a CommonJS without
+    // the __esMoule property.
+    // .strictNamespace is for non-mjs files, mjsStrictNamespace if for mjs files.
     strictNamespace = false,
+    mjsStrictNamespace = strictNamespace,
 
-    // 'true' for mjs files to strictly have .default, instead of having
-    // destructuring-like behavior for their properties.
-    mjsStrictNamespace = true,
     allowTopLevelThis,
     strict,
     strictMode,

packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/output.js

@@ -31,7 +31,7 @@ _foo2 = babelHelpers.interopRequireDefault(require("foo2"))
 
 var
 /*before*/
-foo2 = babelHelpers.interopRequireDefault(require("foo3"))
+foo2 = babelHelpers.interopRequireWildcard(require("foo3"))
 /*after*/
 ;
 

packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/output.js

@@ -1,7 +1,7 @@
 "use strict";
 
 function foo() {
-  const data = babelHelpers.interopRequireDefault(require("foo"));
+  const data = babelHelpers.interopRequireWildcard(require("foo"));
 
   foo = function () {
     return data;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/output.js

@@ -6,7 +6,7 @@ Object.defineProperty(exports, "__esModule", {
 exports.namespace = void 0;
 
 function namespace() {
-  const data = babelHelpers.interopRequireDefault(require("foo"));
+  const data = babelHelpers.interopRequireWildcard(require("foo"));
 
   namespace = function () {
     return data;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/output.js

@@ -1,4 +1,4 @@
 "use strict";
 
-var foo = babelHelpers.interopRequireDefault(require("./foo"));
+var foo = babelHelpers.interopRequireWildcard(require("./foo"));
 console.log(foo);

packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/output.js

@@ -4,5 +4,5 @@ Object.defineProperty(exports, "__esModule", {
   value: true
 });
 exports.namespace = void 0;
-var namespace = babelHelpers.interopRequireDefault(require("./foo"));
+var namespace = babelHelpers.interopRequireWildcard(require("./foo"));
 exports.namespace = namespace;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/output.js

@@ -1,7 +1,7 @@
 "use strict";
 
 function foo1() {
-  const data = babelHelpers.interopRequireDefault(require("white"));
+  const data = babelHelpers.interopRequireWildcard(require("white"));
 
   foo1 = function () {
     return data;
@@ -10,6 +10,6 @@ function foo1() {
   return data;
 }
 
-var foo2 = babelHelpers.interopRequireDefault(require("black"));
+var foo2 = babelHelpers.interopRequireWildcard(require("black"));
 console.log(foo1());
 console.log(foo2);

packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/output.js

@@ -6,7 +6,7 @@ Object.defineProperty(exports, "__esModule", {
 exports.namespace2 = exports.namespace1 = void 0;
 
 function namespace1() {
-  const data = babelHelpers.interopRequireDefault(require("white"));
+  const data = babelHelpers.interopRequireWildcard(require("white"));
 
   namespace1 = function () {
     return data;
@@ -21,5 +21,5 @@ Object.defineProperty(exports, "namespace1", {
     return namespace1();
   }
 });
-var namespace2 = babelHelpers.interopRequireDefault(require("black"));
+var namespace2 = babelHelpers.interopRequireWildcard(require("black"));
 exports.namespace2 = namespace2;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/exec.mjs → packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/exec.js

@@ -1,5 +1,5 @@
+// No exception should be thrown
 import * as foo from "./moduleWithGetter";
 
+expect(foo.baz).toBe(123);
 expect(() => foo.boo).toThrow();
-
-// No exception should be thrown

packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/options.json

@@ -1,3 +1,3 @@
 {
-  "plugins": [["transform-modules-commonjs", { "mjsStrictNamespace": false }]]
+  "plugins": ["transform-modules-commonjs"]
 }

packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/exec.mjs → packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/exec.js

@@ -1,3 +1,4 @@
+// No exception should be thrown
 import Foo, { baz } from "./moduleWithGetter";
 
-// No exception should be thrown
+expect(baz).toBe(123);

packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/output.js

@@ -16,6 +16,8 @@ Object.defineProperty(exports, "baz", {
   }
 });
 
-var _moduleWithGetter = _interopRequireDefault(require("./moduleWithGetter"));
+var _moduleWithGetter = _interopRequireWildcard(require("./moduleWithGetter"));
 
-function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
+
+function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/output.js

@@ -2,10 +2,14 @@
 
 var _foo = _interopRequireDefault(require("foo"));
 
-var Bar = _interopRequireDefault(require("bar"));
+var Bar = _interopRequireWildcard(require("bar"));
 
 var _baz = require("baz");
 
+function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
+
+function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
+
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
 _foo.default = (42, function () {

packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/output.js

@@ -6,7 +6,7 @@ var _two = require("two");
 
 var _three = require("three");
 
-var aNamespace = babelHelpers.interopRequireDefault(require("four"));
+var aNamespace = babelHelpers.interopRequireWildcard(require("four"));
 console.log(_one.default);
 console.log(_two.aNamed);
 console.log(_three.orig);

packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/output.js

@@ -1,7 +1,7 @@
 "use strict";
 
 function mod() {
-  const data = babelHelpers.interopRequireDefault(require("mod"));
+  const data = babelHelpers.interopRequireWildcard(require("mod"));
 
   mod = function () {
     return data;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/options.json

@@ -1,8 +1,3 @@
 {
-  "plugins": [
-    [
-      "transform-modules-commonjs",
-      { "strict": true, "mjsStrictNamespace": false }
-    ]
-  ]
+  "plugins": [["transform-modules-commonjs", { "strict": true }]]
 }