esm module build fix

package.json

@@ -6,16 +6,18 @@
     ".": {
       "import": {
         "types": "./dist/esm/types/index.d.ts",
-        "default": "./dist/esm/index.mjs"
+        "module": "./dist/esm/index.js",
+        "default": "./dist/esm/index.js"
       },
       "require": {
         "types": "./dist/cjs/types/index.d.ts",
+        "module": "./dist/cjs/index.js",
         "default": "./dist/cjs/index.js"
       }
     }
   },
   "types": "./dist/cjs/types/index.d.ts",
-  "main": "./dist/cjs/index.js",
+  "main": "index.js",
   "module": "./dist/esm/index.mjs",
   "source": "./src/index.ts",
   "files": [
@@ -23,7 +25,7 @@
   ],
   "scripts": {
     "clean": "rimraf ./dist",
-    "build": "npm run clean && tsc -p configs/tsconfig.cjs.json && tsc -p configs/tsconfig.esm.json && webpack --mode production",
+    "build": "npm run clean && tsc -p configs/tsconfig.cjs.json && webpack --config webpack.esm.config.js --mode=production && webpack --mode production",
     "test:coverage": "jest --coverage",
     "test": "jest",
     "test:watch": "jest --watch",

webpack.esm.config.js

@@ -0,0 +1,54 @@
+const path = require('path');
+const webpack = require('webpack');
+const { CleanWebpackPlugin } = require('clean-webpack-plugin');
+const { merge } = require('webpack-merge');
+
+const prodConfig = require('./webpack.prod');
+module.exports = function () {
+  const config = {
+    mode: "production",
+    // devtool: 'source-map',
+    entry: './src/index.ts',
+    experiments: {
+      outputModule: true
+    },
+    output: {
+      filename: 'index.js',
+      path: path.resolve(__dirname, 'dist/esm'),
+      library: {
+        type: "commonjs2",
+      }
+    },
+    module: {
+      rules: [
+        {
+          test: /\.tsx?$/,
+          exclude: /(node_modules|bower_components)/,
+          loader: 'ts-loader'
+        }
+      ]
+    },
+    plugins: [
+      new webpack.ProgressPlugin(),
+      new CleanWebpackPlugin(),
+      new webpack.ProvidePlugin({
+        Buffer: ['buffer', 'Buffer'],
+      }),
+      new webpack.ProvidePlugin({
+        process: 'process/browser',
+      })
+    ],
+    resolve: {
+      extensions: ['.tsx', '.ts', '.js'],
+      fallback: {
+        assert: require.resolve('assert'),
+        crypto: require.resolve('crypto-browserify'),
+        os: require.resolve('os-browserify/browser'),
+        stream: require.resolve('stream-browserify'),
+        process: require.resolve('process/browser'),
+        buffer: require.resolve('buffer')
+      }
+    }
+  }
+  return merge(config, prodConfig);
+};