Removed Babel, but keep downlevelIteration and core-js/es6/symbol

Author: Carsten Fuehrmann

packages/react-scripts/config/webpack.config.dev.js

@@ -166,24 +166,7 @@ module.exports = {
           {
             test: /\.(ts|tsx)$/,
             include: paths.appSrc,
-            use: [
-              {
-                loader: require.resolve('babel-loader'),
-                options: {
-                  // @remove-on-eject-begin
-                  babelrc: false,
-                  presets: [require.resolve('babel-preset-react-app')],
-                  // @remove-on-eject-end
-                  // This is a feature of `babel-loader` for webpack (not Babel itself).
-                  // It enables caching results in ./node_modules/.cache/babel-loader/
-                  // directory for faster rebuilds.
-                  cacheDirectory: true,
-                },
-              },
-              {
-                loader: require.resolve('ts-loader'),
-              },
-            ],
+            loader: require.resolve('ts-loader'),
           },
           // Process JS with Babel.
           {

packages/react-scripts/config/webpack.config.prod.js

@@ -174,24 +174,7 @@ module.exports = {
           {
             test: /\.(ts|tsx)$/,
             include: paths.appSrc,
-            use: [
-              {
-                loader: require.resolve('babel-loader'),
-                options: {
-                  // @remove-on-eject-begin
-                  babelrc: false,
-                  presets: [require.resolve('babel-preset-react-app')],
-                  // @remove-on-eject-end
-                  // This is a feature of `babel-loader` for webpack (not Babel itself).
-                  // It enables caching results in ./node_modules/.cache/babel-loader/
-                  // directory for faster rebuilds.
-                  cacheDirectory: true,
-                },
-              },
-              {
-                loader: require.resolve('ts-loader'),
-              },
-            ],
+            loader: require.resolve('ts-loader'),
           },
           // Process JS with Babel.
           {

packages/react-scripts/template/tsconfig.json

@@ -2,7 +2,7 @@
   "compilerOptions": {
     "outDir": "build/dist",
     "module": "esnext",
-    "target": "es6",
+    "target": "es5",
     "lib": ["es6", "dom"],
     "sourceMap": true,
     "allowJs": true,