JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li>Title 1</li>
  <li>Title 2</li>
  <li>Title 3</li>
  <li>Title 4</li>
  <li>Title 5</li>
  <li>Title 6</li>
  <li>Title 7</li>
  <li>Title 8</li>
  <li>Title 9</li>
  <li>Title 10</li>
  <li>Title 11</li>
  <li>Title 12</li>
  <li>Title 13</li>
  <li>Title 14</li>
  <li>Title 15</li>
  <li>Title 16</li>
  <li>Title 17</li>
</ul>

CSS

ul{
  list-style:none;
  padding:0;
  margin:0;
  height:400px;
  overflow-y:auto;
}

ul li{
  padding:12px;
  border-bottom:1px solid #000;
}