03.width,height的继承 · 学习笔记

~~~ <title>Document</title> <style> /* 子元素设置绝对定位,它不会继承父元素的width */ .parent{ width:300px; height:150px; background: red; position: relative; } .child{ position: absolute; height:50px; background: yellow; } </style> </head> <body> <div class="parent"> <div class="child"> </div> </div> ~~~