JSFiddle - React, Tailwind, and code Playground

by Erik

HTML

<div class='outer-container'>
  <div class='container'>
    <div class='overlay'>
    <p>You should be able to read this</p>
    </div>
  </div>
  <div class='container'></div>
</div>

CSS

.outer-container {
  display: flex;
  flex-direction: row;
}

.container {
  height: 90vh;
  width: 30vw;
  margin: 1vh;
  box-sizing: border-box;
  border: dashed 10px red;
  background: blue;
  overflow-y: auto;
  position: static;
  -webkit-overflow-scrolling: touch;
}

.overlay {
  height: 100%;
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: rgba(0, 255, 0, 0.5);
}

.overlay p {
  font-size: 3em;
  margin: 2em auto;
  text-align: center;
}