title: Where's the connection between index.html and index.js in a Create-React-App application?
body: <p>I'm starting to play with the Create React App, but I can't understand how the <code>index.js</code> is loaded inside <code>index.html</code>. This is the html code:</p>
  <pre class="lang-html prettyprint-override"><code>&lt;!doctype html&gt;
  &lt;html lang=&quot;en&quot;&gt;
    &lt;head&gt;
      &lt;meta charset=&quot;utf-8&quot;&gt;
      &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1&quot;&gt;
      &lt;link rel=&quot;shortcut icon&quot; href=&quot;%PUBLIC_URL%/favicon.ico&quot;&gt;
      &lt;!--
        Notice the use of %PUBLIC_URL% in the tag above.
        It will be replaced with the URL of the `public` folder during the build.
        Only files inside the `public` folder can be referenced from the HTML.
  
        Unlike &quot;/favicon.ico&quot; or &quot;favicon.ico&quot;, &quot;%PUBLIC_URL%/favicon.ico&quot; will
        work correctly both with client-side routing and a non-root public URL.
        Learn how to configure a non-root public URL by running `npm run build`.
      --&gt;
      &lt;title&gt;React App&lt;/title&gt;
    &lt;/head&gt;
    &lt;body&gt;
      &lt;div id=&quot;root&quot;&gt;&lt;/div&gt;
      &lt;!--
        This HTML file is a template.
        If you open it directly in the browser, you will see an empty page.
  
        You can add webfonts, meta tags, or analytics to this file.
        The build step will place the bundled scripts into the &lt;body&gt; tag.
  
        To begin the development, run `npm start`.
        To create a production bundle, use `npm run build`.
      --&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  <p>But I can't see anywhere the import of the <code>index.js</code>. Where is the connection? What am I missing?</p>