弹性式布局就是更方便的控制内容的对齐方式
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <style type="text/css"> .item { background-color: aqua; border: #ccc solid 1px; padding: 1rem; text-align: center; margin: 0.75rem; width: 100px; } #container { display: flex; flex-wrap: wrap; background-color: #555; /* 对齐方式 */ justify-content: flex-start; /* flex-start(默认值) */ /* flex-end */ /* center */ /* space-between */ /* space-around */ /* space-evenly */ height: 600px; /* 项目在交叉轴的对齐方式 */ align-items: baseline; /* stretch(默认值) */ /* flex-start flex-end center baseline */ align-content: stretch; /* flex-start flex-end center space-between space-around stretch(默认值) */ } .item-2{ align-self: center; /* auto(默认值) flex-start flex-end center baseline stretch */ order: 2; } .item-1{ order: 3; } .item-3{ order: 1; } </style> </head> <body> <div id="container"> <div class="item item-1"> <h3>Item 1</h3> </div> <div class="item item-2"> <h3>Item 2</h3> </div> <div class="item item-3"> <h3>Item 3</h3> </div> </div> </body> </html>