JSFiddle - React, Tailwind, and code Playground

HTML

<div class="rect ">原本大小</div>
<div class="rect reactsize2">height,width放大</div>

<div class="rect ">原本大小</div>
<div class="rect rectscale2">scale放大</div>

CSS

.rect{
  color:white;
  margin:10px;
  margin-left:25px;
  width:50px;
  height:50px;
  background-color:#1F8A70;
  border: 1px solid black;
}

.reactsize2{
  width:100px;
  height:100px;
}

.rectscale2{
  transform: scale(2);
}