JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
  <div class="item"></div>
</div>

CSS

.wrap {
  position: absolute;
  left: 100px;
  top: 50px;
  width: 500px;
  border: solid 1px;
}
.item {
  position: absoute;
  width: 100px;
  height: 50px;
  background-color: red;
  margin-left: auto;
}