title: How to host popper.js locally
body: <p>I just upgraded to Bootstrap four and realized <a href="https://popper.js.org/" rel="nofollow noreferrer">Popper.js</a> was a dependency. I like to host libraries locally, as I sometimes need to work offline, but when I try to use it offline, I get an error <code>unexpected token export</code>. It works, however, when I use the Cloudflare CDN version, but how can I host popper.js locally?</p>
  <p>(I don't want to use a package manager for this.)</p>