title: Optional Chaining Operator in React and babel
body: <p>In my project I config babel:</p>
  
  <pre><code>{
    "presets": ["react", "es2015","stage-1", "transform-optional-chaining"],
    "plugins": ["transform-runtime"]
  }
  </code></pre>
  
  <p>And this is my <code>devDependencies</code> in <code>package.json</code>:</p>
  
  <pre><code>"devDependencies": {
      "babel-cli": "^7.0.0-alpha.19",
      "babel-loader": "^7.1.5",
      "babel-plugin-module-resolver": "^3.1.1",
      "babel-plugin-transform-optional-chaining": "^7.0.0-beta.3",
      "babel-plugin-transform-runtime": "^6.23.0",
      "babel-preset-es2015": "^6.24.1",
      "babel-preset-stage-1": "^6.24.1",
      "copy-webpack-plugin": "^4.5.2",
      "css-loader": "^1.0.0",
      "file-loader": "^1.1.11",
      "html-webpack-plugin": "^3.2.0",
      "prettier": "^1.14.2",
      "react-hot-loader": "^4.3.4",
      "style-loader": "^0.22.1",
      "url-loader": "^1.1.1",
      "webpack": "^4.16.5",
      "webpack-cli": "^3.1.0",
      "webpack-dev-server": "^3.1.5"
    }
  </code></pre>
  
  <p>When I run the project I get this error:</p>
  
  <blockquote>
    <p>Cannot find module 'babel-preset-transform-optional-chaining'</p>
  </blockquote>
  
  <p>Can anyone explain how to fix this error?</p>