title: Bootstrap 3 dropdown not working
body: <p>I don't really understand, when I launch my html page on local the dropdown menu doesn't work.</p>
  
  <p>I tried to copy/paste my html code on bootply and its work! Incredible ...</p>
  
  <p><a href="http://bootply.com/90610" rel="noreferrer">http://bootply.com/90610</a></p>
  
  <p>Any idea ? </p>
  
  <p>I don't want to include all js file, just necessary file for dropdown (dropdown.js)</p>
  
  <p>I didn't really know what I should try ...</p>
  
  <p>If any one can help me It will really appreciate it.</p>
  
  <p>Thank you</p>