页面架构(笔记3)——水平垂直都居中布局
需求要求:
1.子容器相对父容器水平居中、垂直居中
2,子容器与父容器的自身高度宽度都是未知的
解决方案一(inline-block+text-align+table-cell+vertical-align)
<style type="text/css"> body{margin:20px;} .parent{width:200px;height:300px;} .parent{ text-align: center; display: table-cell; vertical-align: middle; } .child{ display: inline-block; } </style>
<body> <div class="parent"> <div class="child">DEMO</div> </div> </body>
解决方案二(absolute+transform)
<style type="text/css"> body{margin:20px;} .parent{width:200px;height:300px;} .parent{ position: relative; } .child{ position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); } </style> <body> <div class="parent"> <div class="child">DEMO</div> </div> </body>
解决方案三(flex+justify-content+align-items)
<style type="text/css"> body{margin:20px;} .parent{width:200px;height:300px;} .parent{ display: flex; justify-content: center; align-items: center; } </style> <body> <div class="parent"> <div class="child">DEMO</div> </div> </body>