通过给需要居中的元素加入如下属性:使用此种方法,该元素会相对第一个具有定位环境的父元素居中
position: absolute; left: 0; top: 0; bottom: 0; right: 0; margin: auto;
示例代码:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> .fat{ width: 500px; height: 500px; border: solid 1px black; position: relative; } .sub{ width: 100px; height: 100px; border: solid 1px red; position: absolute; left: 0; top: 0; bottom: 0; right: 0; margin: auto; } </style> </head> <body> <div class="fat"> <div class="sub"></div> </div> </body> </html>
来源:https://www.cnblogs.com/huwt/p/10947197.html