JSFiddle - React, Tailwind, and code Playground

HTML

<html>
  <head>
    <style type="text/css">
    .container {
        position: relative;
        width:500px;
        padding-left:200px
    }

    .container:after {
        content: '';
        width: calc(100% - 200px);
        position: absolute;
        left: 200px;
        bottom: 0px;
        border-bottom: 1px dotted black;
    }
    </style>
  </head>
  <body>
    <div class="container">asdf</div>
  </body>
</html>