JSFiddle - React, Tailwind, and code Playground

HTML

<ul id=menu>
      <li><a href="#L384">Section 1</a></li>
            <li><a href="#details">Section 2</a></li>
            <li><a href="#FAQ">Section 3</a></li>
       ...

CSS

#menu {
  position: fixed;
  right: 0;
  top: 10%;
  width: 8em;
  margin-top: -2.5em;
}