Add jquery and popper. Show errors in browser

Author: 柏正权

package.json

@@ -19,7 +19,9 @@
   "dependencies": {
     "bootstrap-loader": "^2.2.0",
     "glob-all": "^3.1.0",
+    "jquery": "^3.2.1",
     "lodash": "^4.17.4",
+    "popper": "^1.0.0",
     "postcss": "^6.0.11",
     "react": "^15.6.1",
     "react-bootstrap": "^0.31.3",

webpack.dev.js

@@ -11,6 +11,7 @@ module.exports = merge(common, {
     port: 9000,
     open: true,
     hot: true,
+    overlay: true,
     stats: 'errors-only',
     historyApiFallback: true
   },