JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
  <div class="carousel__carcass">
    <div class="carousel__flow clearfix"
      style="width: 1650px;"
    ><!--
      --><span class="carousel__item red"></span><!--
      --><span class="carousel__item green"></span><!--
      --><span class="carousel__item blue"></span><!--
      --><span class="carousel__item red"></span><!--
      --><span class="carousel__item blue"></span><!--
      --><span class="carousel__item green"></span><!--
      --><span class="carousel__item red"></span><!--
      --><span class="carousel__item green"></span><!--
      --><span class="carousel__item blue"></span><!--
      --><span class="carousel__item red"></span><!--
      --><span class="carousel__item blue"></span><!--
    </div>
  </div>
</div>

CSS

body {
  padding: 15px;
  margin:  0;
}

.wrapper {
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);
}
.carousel__carcass {
  display:      block;
  overflow-x:   auto;
  margin-left:  -15px;
  margin-right: -15px;
}
.carousel__flow {
  padding:     30px;
}
.carousel__item {
  float:      left;
  width:      150px;
  height:     150px;
}
.red {
  background-color: red;
}
.green {
  background-color: green;
}
.blue {
  background-color: blue;
}
.clearfix:after {
  content: "";
  display: table;
  clear:   both;
}

JavaScript

/*

	ТАК УЖ ЛИ НУЖЕН CLEARFIX?
  
  		У МЕНЯ БЕЗ НЕГО РАБОТАЕТ...
      
*/