immutable-js
diff --git a/‎babel.config.js
Lines changed: 23 additions & 0 deletions b/‎babel.config.js
Lines changed: 23 additions & 0 deletions
diff --git a/‎jest.config.js
Lines changed: 0 additions & 3 deletions b/‎jest.config.js
Lines changed: 0 additions & 3 deletions
diff --git a/‎resources/jestPreprocessor.js
Lines changed: 0 additions & 71 deletions b/‎resources/jestPreprocessor.js
Lines changed: 0 additions & 71 deletions
diff --git a/‎resources/rollup-config.mjs
Lines changed: 1 addition & 2 deletions b/‎resources/rollup-config.mjs
Lines changed: 1 addition & 2 deletions
diff --git a/‎src/.babelrc.json
Lines changed: 0 additions & 13 deletions b/‎src/.babelrc.json
Lines changed: 0 additions & 13 deletions
@@ -0,0 +1,23 @@
+module.exports = function (api) {
+  // const isTest = api.env('test');
+
+  api.cache(() => process.env.NODE_ENV);
+
+  const presets = [
+    [
+      '@babel/env',
+      {
+        targets: { browsers: ['last 2 versions', 'ie >= 10'] },
+      },
+    ],
+    ['@babel/preset-typescript', { allowDeclareFields: true }],
+  ];
+
+  return {
+    assumptions: {
+      noClassCalls: true,
+      superIsCallableConstructor: true,
+    },
+    presets,
+  };
+};
@@ -3,9 +3,6 @@ module.exports = {
   testRunner: 'jest-jasmine2', // See https://jestjs.io/blog/2021/05/25/jest-27#flipping-defaults as `jasmine-check` uses jasmine and not `jest-circus`
   moduleFileExtensions: ['js', 'ts'],
   resolver: '<rootDir>/resources/jestResolver.js',
-  transform: {
-    '^.+\\.(js|ts)$': '<rootDir>/resources/jestPreprocessor.js',
-  },
   testRegex: '/__tests__/.*\\.(ts|js)$',
   unmockedModulePathPatterns: ['./node_modules/react'],
 };
@@ -1,5 +1,5 @@
 import path from 'path';
-import babel from '@rollup/plugin-babel';
+import { babel } from '@rollup/plugin-babel';
 import commonjs from '@rollup/plugin-commonjs';
 import json from '@rollup/plugin-json';
 import terser from '@rollup/plugin-terser';
@@ -12,7 +12,6 @@ const extensions = ['.ts', '.tsx', '.js', '.jsx'];
 
 export default [
   {
-    external: [/@babel\/runtime/],
     input: path.join(SRC_DIR, 'Immutable.js'),
     plugins: [
       commonjs(),