refactor: disable dynamic chunks for umd mode

package.json

@@ -49,6 +49,7 @@
     "@umijs/core": "^4.0.17",
     "@umijs/utils": "^4.0.17",
     "@vercel/ncc": "0.33.3",
+    "babel-plugin-dynamic-import-node": "2.3.3",
     "babel-plugin-module-resolver": "4.1.0",
     "babel-plugin-react-require": "3.1.3",
     "babel-plugin-transform-define": "2.0.1",

src/builder/bundle/index.ts

@@ -70,6 +70,7 @@ export default async (opts: {
           pluginDynamicImportNode: false,
         },
       ],
+      beforeBabelPlugins: [require.resolve('babel-plugin-dynamic-import-node')],
       extraBabelPresets: config.extraBabelPresets,
       extraBabelPlugins: config.extraBabelPlugins,
 

tests/fixtures/build/bundle-dynamic-import/.fatherrc.ts

@@ -0,0 +1,3 @@
+export default {
+  umd: {},
+};

tests/fixtures/build/bundle-dynamic-import/expect.ts

@@ -0,0 +1,4 @@
+export default (files: Record<string, string>) => {
+  // expect single dist file (no async chunks)
+  expect(Object.keys(files)).toHaveLength(1);
+};

tests/fixtures/build/bundle-dynamic-import/package.json

@@ -0,0 +1 @@
+{}

tests/fixtures/build/bundle-dynamic-import/src/dynamic.ts

@@ -0,0 +1 @@
+export default () => {};

tests/fixtures/build/bundle-dynamic-import/src/index.ts

@@ -0,0 +1,3 @@
+export default async () => {
+  (await import('./dynamic')).default();
+};