title: How to use bootstrap scrollspy on angular 7 project?
body: <p>I have transform basic html page with bootstrap scrollspy component and my nav doesn't work (no change when page scroll).</p>
  
  <p>I have install bootstrap 4 with the command below :</p>
  
  <pre><code>npm install bootstrap
  </code></pre>
  
  <p>There is no change on page scroll or when i click on menu there is no "active" flag.</p>
  
  <p>Can you help me ? Thanks :)</p>