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1222 将flex容器与项目的常用属性全部进行实例演示，并理解属性的常用值的显示效果
一米互联
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将flex容器与项目的常用属性全部进行实例演示，并理解属性的常用值的显示效果

运用flex容器布局

  1. <style>
  2.         *{
  3.             margin: 0;
  4.             padding: 0;
  5.             box-sizing: border-box;
  6.         }
  7.         body *:not(.content) {
  8.             background: rgb(4, 207, 180);
  9.         }
  10.         header,footer{
  11.             height: 5vh;
  12.         }
  13.         .content{
  14.             display: flex;
  15.             height: 90vh;
  16.         }
  17.         .content aside{
  18.             min-width: 15em;
  19.         }
  20.         .content main {
  21.             min-width: calc(100% - 30em);
  22.             margin: 0 0.5em;
  23.         }
  24.         .content{
  25.             margin: 0.5em 0;
  26.             height: calc(90vh - 1em);
  27.         }
  28.         .content main {
  29.             min-width: calc(100% - 30em - 1em);
  30.         }
  31.     </style>
  32. </head>
  33. <body>
  34.     <header>头部</header>
  35.     <div class="content">
  36.         <aside>左侧内容</aside>
  37.         <main>主体内容</main>
  38.         <aside>右侧内容</aside>
  39.     </div>
  40.     <footer>尾部</footer>
  41. </body>

项目的常用属性

1.运用display: flex;的元素被称为flex容器，它的所有子元素称为flex项目。并且容器中的项目自动转为”行内块元素”。

flex-flow属性:
  1. <style>
  2.         *{
  3.             margin: 0;
  4.             padding: 0;
  5.             box-sizing: border-box;
  6.         }
  7.         .content{
  8.             display: flex;
  9.             height: 15em;
  10.             border: 1px solid black;
  11.             padding: 1em;
  12.             margin: 1em;
  13.         }
  14.         .content>.one{
  15.             width: 5em;
  16.             height: 5em;
  17.             background:rgb(198, 231, 7);
  18.             border: 1px solid blue;
  19.         }
  20.         .content{
  21.             flex-flow: row nowrap;
  22.             /*单行容器，主轴为水平方向 不换行*/
  23.         }
  24.         .content{
  25.             flex-flow:column nowrap; 
  26.            /*单行容器，主轴为垂直方向 不换行*/
  27.         }
  28.         .content{
  29.             flex-flow:column wrap;
  30.           /*单行容器，主轴为垂直方向 可换行*/
  31.         }
  32.     </style>
  33. </head>
  34. <body>
  35.     <div class="content">
  36.         <div class="one">内容1</div>
  37.         <div class="one">内容2</div>
  38.         <div class="one">内容3</div>
  39.         <div class="one">内容4</div>
  40.         <div class="one">内容5</div>
  41.         <div class="one">内容6</div>
  42.         <div class="one">内容7</div>
  43.         <div class="one">内容8</div>
  44.     </div>



justify-content属性:
  1.         .content{
  2.             justify-content: flex-start;
  3.             /*默认左对齐*/
  4.             justify-content: flex-end;
  5.             /*右对齐*/
  6.             justify-content: center;
  7.             /*居中对齐*/
  8.         }
  9.         .content{
  10.             align-items: stretch;
  11.             /* 默认交叉轴（垂直方向）对齐方式 */
  12.             align-items: flex-start;
  13.             /* 上 */
  14.             align-items: flex-end;
  15.             /* 下 */
  16.             align-items: center;
  17.             /* 中间 */
  18.         }







align-content属性:
  1.       .content{
  2.             flex-flow: row wrap;
  3.            /*项目在多行容器中的交叉轴上的对齐方式 */
  4.             align-content: stretch;
  5.             align-content: flex-start;
  6.             align-content: flex-end;
  7.             align-content: center;
  8.             align-content: space-between;
  9.             align-content: space-around;
  10.             align-content: space-evenly;
  11.         }






flex: 放大因子 收缩因子 项目在主轴上的基准宽度

  1.         .content .one {
  2.             /* 允许放大和收缩 */
  3.             flex: 1 1 auto;
  4.             flex: auto;
  5.         }


Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：
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