JSFiddle - React, Tailwind, and code Playground

HTML

<body>
  <div id="div1"></div>
  <div id="div2"></div>
</body>

CSS

*{border:1px solid red}
#div1{
  width: 160px;
  height: 160px;
  top: 0;
  left 0;
  display:inline-block
}

#div2{
  width: auto;
  height: 160px;
  top 0;
  left: 160px;
  background-color: blue;  
  display:inline-block
}