title: How to disable auto code spliting for Rollup.js bundle?
body: <p>I am trying to use Rollup.js v2.40.0 to build a reactjs application.</p>
  <p>Rollup.js can make code-spliting automatically if it found the importer is used in multi modules. For example:</p>
  <pre><code>//Login.tsx
  import Button from '../components/Button';
  render &lt;Button /&gt;;
  
  //Dashboard.tsx
  import Button from '../components/Button';
  render &lt;Button /&gt;;
  
  //somewhere
  const Login = import('../pages/Login');
  const Dashboard = import('../pages/Dashboard');
  </code></pre>
  <p>bundule result will be:</p>
  <pre><code>//Login.js
  var Button = require('./Button-d8dc4a64.js');
  
  //Dashboard.js
  var Button = require('./Button-d8dc4a64.js');
  
  //Button-d8dc4a64.js
  //....
  </code></pre>
  <p>I don't want to split Button component. I want Login and Dashboard bundle contains Button code. It there a way or an option can disable this feature? I have already checked out the offical document and still can't solve this.</p>