JSFiddle - React, Tailwind, and code Playground

HTML

<div class="row">
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
</div>

CSS

.row {
  width: 100%;
  max-width: 500px;
  background: #DADADA;
  display: flex;
  overflow: auto;
  justify-content: flex-end;
}
.box {
  width: 200px;
  height: 40px;
  margin: 4px 10px;
  background: red;
  flex-shrink: 0;
}