react_on_rails initial generate

babel.config.js

@@ -0,0 +1,33 @@
+// The source code including full typescript support is available at: 
+// https://github.com/shakacode/react_on_rails_demo_ssr_hmr/blob/master/babel.config.js
+
+module.exports = function (api) {
+  const defaultConfigFunc = require('shakapacker/package/babel/preset.js')
+  const resultConfig = defaultConfigFunc(api)
+  const isProductionEnv = api.env('production')
+
+  const changesOnDefault = {
+    presets: [
+      [
+        '@babel/preset-react',
+        {
+          development: !isProductionEnv,
+          useBuiltIns: true
+        }
+      ]
+    ].filter(Boolean),
+    plugins: [
+      process.env.WEBPACK_SERVE && 'react-refresh/babel',
+      isProductionEnv && ['babel-plugin-transform-react-remove-prop-types',
+        {
+          removeImport: true
+        }
+      ]
+    ].filter(Boolean),
+  }
+
+  resultConfig.presets = [...resultConfig.presets, ...changesOnDefault.presets]
+  resultConfig.plugins = [...resultConfig.plugins, ...changesOnDefault.plugins ]
+
+  return resultConfig
+}