W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<!DOCTYPE html> <html> <head> <style> .flex-container { display: -webkit-flex; display: flex; width: 400px; height: 250px; background-color: lightgrey; } .flex-item { background-color: cornflowerblue; width: 75px; height: 75px; margin: auto; } </style> </head> <body> <div class="flex-container"> <div class="flex-item">完美的居中！</div> </div> </body> </html>