JSFiddle - React, Tailwind, and code Playground

HTML

<div class="flex">
  <div class="flex-item"></div>
  <div class="flex-item"></div>
  <div class="flex-item"></div>
</div>

CSS

.flex {
  display: flex;
  gap: 16px;
}

.flex-item {
  width: 50px;
  height: 50px;
  background-color: blue;
}