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flex布局基础知识--php培训第九期线上班
涤尘
Original
629 people have browsed it

自学:align-self, order的用法

order:定义项目的排列顺序。数值越小，排列越靠前，默认为0
align-self该属性允许单个项目有与其它项目不一样的对齐方式, 可覆盖掉容器的flex-items属性 默认值: auto,表示继承父元素的align-items,如果没有父元素,则等价于stretch
  1. .demo1 > .item:first-of-type {
  2.   order: 10;
  3. }
  4. .demo1 > .item:nth-last-of-type(3) {
  5.   order: 8;
  6. }
  7. .demo1 > .item:nth-last-of-type(2) {
  8.   order: 6;
  9. }
  10. .demo1 > .item:last-of-type {
  11.   order: 1;
  12.   align-self: flex-end;
  13. }

演示效果

用flex布局改圣杯布局

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <title>圣杯布局</title>
  6.     <style type="text/css">
  7.    header,footer {  
  8.          box-sizing: border-box;
  9.          background-color: green;  
  10.          height: 50px;  
  11.          border: 1px solid;
  12.        }
  13.        main {  
  14.         display: flex;
  16.     }
  18.     main > aside {  
  19.         height: 600px;  
  20.         width: 200px;  
  21.         background-color: lightgreen;
  22.         flex: none;
  23.     }
  24.     main > article{  
  25.         height: 600px;  
  26.         width: 100%;  
  27.         background-color: blue;
  28.         flex: auto;
  29.     }
  30.     main > aside:first-of-type {
  31.         order: -1;
  33.     }
  35.         </style>
  36. </head>
  37. <body >
  38. <header>头部</header>
  39. <main>
  40.     <article>主体内容区</article>
  41.     <aside >左侧</aside>
  42.     <aside >右侧</aside>
  43. </main>
  44. <footer>底部</footer>
  45. </body>
  46. </html>

效果图

总结：需要多写多练，关于flex要灵活运用。

手抄代码如下：











Correction status：qualified

Teacher's comments：在没有参考线的纸上, 还能写这么整齐 不容易
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