diff --git a/Ch02/webpack-dev-enviroment.md b/Ch02/webpack-dev-enviroment.md
index 6fedd8a..f1f76af 100644
--- a/Ch02/webpack-dev-enviroment.md
+++ b/Ch02/webpack-dev-enviroment.md
@@ -107,7 +107,7 @@
 	    filename: 'index_bundle.js',
 	  },
 	  module: {
-	  	// loaders 則是放欲使用的 loaders，在這邊是使用 babel-loader 將所有 .js（這邊用到正則式）相關檔案（排除了 npm 安裝的套件位置 node_modules）轉譯成瀏覽器可以閱讀的 JavaScript。preset 則是使用的 babel 轉譯規則，這邊使用 react、es2015
+	  	// loaders 則是放欲使用的 loaders，在這邊是使用 babel-loader 將所有 .js（這邊用到正則式）相關檔案（排除了 npm 安裝的套件位置 node_modules）轉譯成瀏覽器可以閱讀的 JavaScript。preset 則是使用的 babel 轉譯規則，這邊使用 react、es2015。若是已經單獨使用 .babelrc 作為 presets 設定的話，則可以省略 query
 	    loaders: [
 	      {
 	        test: /\.js$/,
diff --git a/Ch03/todo-examples/package.json b/Ch03/todo-examples/package.json
index 23b7376..3e27a43 100644
--- a/Ch03/todo-examples/package.json
+++ b/Ch03/todo-examples/package.json
@@ -7,8 +7,7 @@
     "example": "examples"
   },
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1",
-    "dev": "webpack-dev-server --devtool eval --progress --colors --content-base build"
+    "start": "webpack-dev-server --colors --inline --content-base ."
   },
   "author": "kdchang",
   "license": "MIT",
diff --git a/Ch03/todo-examples/webpack.config.js b/Ch03/todo-examples/webpack.config.js
index 77b8066..cc1e09f 100644
--- a/Ch03/todo-examples/webpack.config.js
+++ b/Ch03/todo-examples/webpack.config.js
@@ -20,9 +20,6 @@ module.exports = {
         test: /\.js$/,
         exclude: /node_modules/,
         loader: 'babel-loader',
-        query: {
-          presets: ['es2015', 'react'],
-        },
       },
     ],
   },
diff --git a/Ch05/react-router-example/webpack.config.js b/Ch05/react-router-example/webpack.config.js
index 22c12b1..b95a7fb 100644
--- a/Ch05/react-router-example/webpack.config.js
+++ b/Ch05/react-router-example/webpack.config.js
@@ -27,9 +27,6 @@ module.exports = {
       test: /\.js$/,
       exclude: /node_modules/,
       loader: 'babel-loader',
-      query: {
-        presets: ['es2015', 'react'],
-      },
     }],
   },
   devServer: {
diff --git a/Ch07/react-flux-example/webpack.config.js b/Ch07/react-flux-example/webpack.config.js
index 22c12b1..b95a7fb 100644
--- a/Ch07/react-flux-example/webpack.config.js
+++ b/Ch07/react-flux-example/webpack.config.js
@@ -27,9 +27,6 @@ module.exports = {
       test: /\.js$/,
       exclude: /node_modules/,
       loader: 'babel-loader',
-      query: {
-        presets: ['es2015', 'react'],
-      },
     }],
   },
   devServer: {
diff --git a/Ch07/react-redux-example/webpack.config.js b/Ch07/react-redux-example/webpack.config.js
index 92e2129..ecd2a70 100644
--- a/Ch07/react-redux-example/webpack.config.js
+++ b/Ch07/react-redux-example/webpack.config.js
@@ -27,9 +27,6 @@ module.exports = {
       test: /\.js$/,
       exclude: /node_modules/,
       loader: 'babel-loader',
-      query: {
-        presets: ['es2015', 'react'],
-      },
     }],
   },
   devServer: {
diff --git a/Ch09/react-router-redux-github-finder/webpack.config.js b/Ch09/react-router-redux-github-finder/webpack.config.js
index 22c12b1..b95a7fb 100644
--- a/Ch09/react-router-redux-github-finder/webpack.config.js
+++ b/Ch09/react-router-redux-github-finder/webpack.config.js
@@ -27,9 +27,6 @@ module.exports = {
       test: /\.js$/,
       exclude: /node_modules/,
       loader: 'babel-loader',
-      query: {
-        presets: ['es2015', 'react'],
-      },
     }],
   },
   devServer: {
diff --git a/Ch10/react-router-redux-node-isomorphic-open-cook/webpack.config.js b/Ch10/react-router-redux-node-isomorphic-open-cook/webpack.config.js
index ce681f5..8d0c708 100644
--- a/Ch10/react-router-redux-node-isomorphic-open-cook/webpack.config.js
+++ b/Ch10/react-router-redux-node-isomorphic-open-cook/webpack.config.js
@@ -26,9 +26,6 @@ module.exports = {
       test: /\.js$/,
       exclude: /node_modules/,
       loader: 'babel-loader',
-      query: {
-        presets: ['es2015', 'react'],
-      },
     }],
   },
 };