title: How do I install popper v2?
body: <p>Running the command:</p>
  
  <p><code>npm install popper.js --save</code> </p>
  
  <p>will return the warning message: </p>
  
  <p><code>npm WARN deprecated popper.js@1.16.1: You can find the new Popper v2 at @popperjs/core, this package is dedicated to the legacy v1</code></p>
  
  <p>what the is npm command for installing popper v2?</p>