title: React + Webpack/ Create-React-App: Very Big Bundle Size
body: <p>I am using create-react-app for my project. My src folder is 600KB in size. Here are the dependencies for the project.</p>
  
  <pre><code> "devDependencies": {
      "eslint": "3.12.2",
      "eslint-config-standard": "6.2.1",
      "eslint-plugin-promise": "3.4.0",
      "eslint-plugin-react": "6.8.0",
      "eslint-plugin-standard": "2.0.1",
      "react-scripts": "0.8.4",
      "react-svg-inline": "1.2.0"
    },
    "dependencies": {
      "axios": "0.15.3",
      "chart.js": "2.4.0",
      "clipboard": "1.5.16",
      "jwt-decode": "^2.1.0",
      "moment": "2.17.1",
      "react": "15.4.1",
      "react-chartjs-2": "2.0.0",
      "react-copy-to-clipboard": "4.2.3",
      "react-datepicker": "0.40.0",
      "react-dom": "15.4.1",
      "react-dropdown": "1.2.0",
      "react-highlight": "0.9.0",
      "react-ladda": "5.0.5",
      "react-redux": "5.0.1",
      "react-redux-loading-bar": "2.6.5",
      "react-router": "3.0.0",
      "react-router-redux": "4.0.7",
      "react-select": "1.0.0-rc.3",
      "react-spinner": "0.2.6",
      "react-tap-event-plugin": "2.0.1",
      "redux": "3.6.0",
      "redux-thunk": "2.1.0",
      "react-dropzone": "3.11.0"
    },
  </code></pre>
  
  <p>When I build, I notice that the generated JS bundle is about 1.7MB. I can't figure it out. Why is the JS bundle so large when the entire source folder is just 600KB including images and other assets?</p>