title: How to use Command Prompt after ng serve was compiled
body: <p>In Angular 5, after creating project folder, installing Angular CLI, Node.js (all latest versions) and ng serve was compiled successfully through command prompt. Then I tried to use command prompt to install bootstrap. I could not control / use command prompt. What might be the cause and effect?</p>
  
  <p><a href="https://i.stack.imgur.com/itZ8L.jpg" rel="nofollow noreferrer">Command prompt stuck after compilation</a></p>