嵌套盒子垂直居中技巧-优快云博客

本文链接：https://blog.youkuaiyun.com/liu18130617928/article/details/107182571

嵌套盒子垂直居中

公共代码部分

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
	.out, .in {
      border: 1px solid #000;
    }
  </style>
</head>
<body>
  <div class="out">
    <div class="in"></div>
  </div>
</body>
</html>

使用定位配合transform

 .out {
      background: plum;
      width: 300px;
      height: 300px;
      position: relative;
    }
    .in {
      background: olive;
      width: 50%;
      height: 50%;
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
    }

使用弹性布局flex

	.out {
      background: plum;
      display: flex;
      justify-content: center;
      align-items:center;
      width: 300px;
      height: 300px;
    }
    .in {
      background: olive;
      width: 50%;
      height: 50%;
    }

使用网格布局

	.out {
      background: plum;
      display: grid;
      justify-items: center; 在行中对齐方式
      align-items: center; 在列中的对齐方式
      width: 300px;
      height: 300px;
    }
    .in {
      background: olive;
      width: 50%;
      height: 50%;
    }

使用定位

	.out {
      background: plum;
      position: relative;
      width: 300px;
      height: 300px;
    }
    .in {
      background: olive;
      width: 50%;
      height: 50%;
      position: absolute;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      margin: auto;
    }

使用table-cell方法

	.out {
      background: plum;
      display: table-cell;
      vertical-align: middle;
      text-align: center;
      width: 300px;
      height: 300px;
    }
    .in {
      background: olive;
      width: 50%;
      height: 50%;
      display: inline-block;
    }