112 lines
3.1 KiB
HTML
112 lines
3.1 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<style>
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*{
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margin:0;
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padding:0;
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}
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.box{
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width: 1000px;
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height: 500px;
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background: pink;
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display:flex;
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/* 通过display:flex来把目标元素设置成flex布局 */
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flex-direction: row;
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/* flex-direction 属性决定主轴的方向，值为row的时候水平排列 起点在左 */
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align-items: center;
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}
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.box1{
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width: 1000px;
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height: 500px;
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background: gold;
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display:flex;
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flex-direction: row;
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align-items: flex-start;
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}
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.left,.left1{
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width: 200px;
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height: 200px;
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background: red;
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}
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.right,.right1{
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width: 200px;
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height: 200px;
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background: blue;
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}
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.box3{
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align-items: flex-end;
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}
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.box4{
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align-items: baseline ;
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}
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.box5{
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align-items: stretch;
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}
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.lefta{
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height:auto
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}
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.boxfin{
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flex-direction: column;
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align-items: center;
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}
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</style>
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</head>
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<body>
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<div style="margin-bottom: 50px;">
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注：以下所有实例 基于flex-direction:row的情况，即水平排列 起点在左边
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且 主轴为默认
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</div>
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<div class="box">
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<div class="left"></div>
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<div class="right"></div>
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</div>
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<div style=" margin-bottom: 30px;">
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上面是 align-items:center 居中的状况
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</div>
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<div class="box1">
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<div class="left"></div>
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<div class="right"></div>
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</div>
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<div style=" margin-bottom: 30px;">
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上面是 align-items: flex-start; 起点在上面
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</div>
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<div class="box box4">
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<div class="left"></div>
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<div class="right"></div>
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</div>
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<div style=" margin-bottom: 30px;">
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上面是 align-items:base-line 项目的第一行文字的基线对齐的情况
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</div>
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<div class="box1 box5">
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<div class="left lefta"></div>
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<div class="right lefta"></div>
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</div>
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<div style=" margin-bottom: 30px;">
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上面是 align-items:stretch（默认值） 如果项目未设置高度或设为auto，将占满整个容器的高度。
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</div>
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<div class="box1 boxfin">
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<div class="left"></div>
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<div class="right"></div>
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</div>
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<div class="zong">
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总结1：flex-direction属性定义的是主轴方向，默认为水平，所以 交叉轴方向默认为垂直;
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<p>当 flex-direction的值为column的时候，align-items决定的就是垂直方向的排列方式</p>
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<b>align-items决定的是交叉轴的排列方式 而不一定是单指 垂直的排列方式</b>
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</div>
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</body>
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</html>
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