JSFiddle - React, Tailwind, and code Playground

HTML

<div class="one">
  <div class=two></div>
</div>

CSS

.one {
  height:300px;
  width:700px;
  overflow-y:hidden;
  overflow-x:visible;
  background-color:red;
  position:relative;
  margin-left:50px;
}
.two {
  position:absolute;
  background-color:green;
  height:20px;
  width:100px;
  top:0;
  left:-20px;
}