JSFiddle - React, Tailwind, and code Playground

by cj1406942109

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>块级元素垂直居中</title>
</head>
<body>
  <div class="parent">
    <div class="child">
      我是块级元素，我要垂直居中
    </div>
  </div>
</body>
</html>

CSS

.parent {
  width: 500px; /* 为了显示方便，与本文知识点无关 */
  background-color: teal; /* 为了显示方便，与本文知识点无关 */
  height: 300px;
  
  position: relative;
}
.child {
  background-color: tomato;
  color: #fff;
  width: 100px;
  
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}