JSFiddle - React, Tailwind, and code Playground

HTML

<body>

</body>

CSS

body {
  margin: 0;
}

#menu {
  height: 100vh;
  width: 100px;
  background: #fff;
}

JavaScript

window.onload = appendNavigation;

function appendNavigation() {
	var navigation = document.createElement('div');
  navigation.id = 'menu';
  navigation.innerHTML = '<ul><li>' +
   '<li><a href="../about_us.htm">aboutus</a></li>' + '</ul></li>';
  document.body.appendChild(navigation);
}