Align regenerator-transform import with native ESM (#13086)

* Align `regenerator-transform` import with native ESM * Add `regenerator` test to `@babel/standalone`
babel · Apr 7, 2021 · 6d89daf · 6d89daf
1 parent 42e630e
commit 6d89daf
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Showing 3 changed files with 15 additions and 5 deletions.
diff --git a/babel.config.js b/babel.config.js
@@ -475,15 +475,14 @@ function pluginNodeImportInteropBabel({ template }) {
 }
 
 function pluginNodeImportInteropRollup({ types: t }) {
-  const depsUsing__esModuleAndDefaultExport = [
-    src => src.startsWith("babel-plugin-polyfill-"),
-  ];
+  const depsUsing__esModuleAndDefaultExport = src =>
+    src.startsWith("babel-plugin-polyfill-") || src === "regenerator-transform";
 
   return {
     visitor: {
       ImportDeclaration(path) {
         const { value: source } = path.node.source;
-        if (depsUsing__esModuleAndDefaultExport.every(test => !test(source))) {
+        if (!depsUsing__esModuleAndDefaultExport(source)) {
           return;
         }
 

diff --git a/packages/babel-plugin-transform-regenerator/src/index.js b/packages/babel-plugin-transform-regenerator/src/index.js
@@ -1 +1,2 @@
-export { default } from "regenerator-transform";
+import regeneratorTransform from "regenerator-transform";
+export default regeneratorTransform.default;
diff --git a/packages/babel-standalone/test/babel.js b/packages/babel-standalone/test/babel.js
@@ -181,6 +181,16 @@ const require = createRequire(import.meta.url);
           [].includes(2);"
         `);
       });
+
+      it("regenerator works", () => {
+        const output = Babel.transform("function* fn() {}", {
+          sourceType: "module",
+          targets: { ie: 11 },
+          presets: ["env"],
+        }).code;
+
+        expect(output).toMatch("regeneratorRuntime.mark(fn)");
+      });
     });
 
     describe("custom plugins and presets", () => {