JSFiddle - React, Tailwind, and code Playground

by stovberpv

HTML

<div id='page'>
  <div id='menu-section'>
    <span class='title'>Меню</span>
    <ul id='menu'>
      <li><a href="#A">Первый якорь</a></li>
      <li><a href="#B">Второй якорь</a></li>
      <li><a href="#C">Третий якорь</a></li>
    </ul>
  </div>
  <div id='A' class='block'><span class='title'>Первый блок</span></div>
  <div id='B' class='block'><span class='title'>Второй блок</span></div>
  <div id='C' class='block'><span class='title'>Третий блок</span></div>
</div>

CSS

#A.block { background-color: cornflowerblue; }
#B.block { background-color: crimson; }
#C.block { background-color: orange; }
.title { color: #fff; display: block; }
.block {
  margin: 10px 0;
  height: 100vh;
  text-align: center;
  border-radius: 3px;
}
.block .title { padding: 20px 0; }
#menu-section { position: relative; }
#menu-section .title {
  padding: 10px;
  background-color: rgba(0, 0, 0, .5);
  border-radius: 3px;
}
ul {
  top: 100%;
  left: 0;
  list-style: none;
  background-color: #fff;
  padding: 10px;
  margin: 0;
}