src/loaders/index.ts

@@ -1,11 +1,13 @@
 import type { WebpackOptions } from 'types';
 import type webpack from 'webpack';
+import getEsmLoader from './main-loaders/esm-loader';
 import { getAssetsLoaders } from './asset-loaders';
 import getMainLoader from './main-loaders';
 import { getStyleLoaders } from './style-loaders';
 import getSvgLoader from './svg-loaders';
 
 const createLoaders = (options: WebpackOptions): (webpack.RuleSetRule | null)[] => [
+  getEsmLoader(),
   getMainLoader(options),
   getSvgLoader(options),
   ...getStyleLoaders(options),

src/loaders/main-loaders/esm-loader/index.ts

@@ -0,0 +1,8 @@
+const getEsmLoader = () => ({
+  test: /\.m?js/,
+  resolve: {
+    fullySpecified: false,
+  },
+});
+
+export default getEsmLoader;