JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="text">Your very and very long text here</div>
  <div class="scrollbar-width"></div>
</div>

CSS

.container {
  display: flex;
  width: 100px;/*to make scrollbar necessary*/
  height: 30px;/*to make scrollbar necessary*/
  border: 1px solid blue;
}
.text {
  flex: 1; 
  float: left;
  overflow-y: hidden; 
}
.scrollbar-width {
  float: left; 
  overflow-x: hidden; 
  overflow-y: scroll; 
  visibility: hidden;
}
.scrollbar-width::-webkit-scrollbar { /* for debugging */
  background-color: red;
}
.text:hover {
  overflow-y: scroll; 
}
.text:hover + .scrollbar-width {
  display: none;
}