HTML页面设计

回温上节课内容

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<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>flex弹性布局</title>
		<style type="text/css">
			

			.container {
				background-color: black;
				width: 660px;
				width: 300px;
				height: 400px;
				display: flex;
				/*属性0 display: -webkit-flex;*/
				
				/*属性1:规定主轴方向,按行还是按列显示*/
				/*flex-direction: row;
				flex-direction: column;
				flex-direction: column-reverse;
				flex-direction: row-reverse;
				flex-direction: row;*/
				
				/*属性2:规定空间不够时,如何换行;*/
				/*flex-wrap: nowrap;
				flex-wrap: wrap;
				flex-wrap: wrap-reverse;*/
				
				/*属性3=1+2*/
				/*flex-flow: row wrap;*/
				
				/*属性4.定义了项目在主轴上的对齐方式*/
				/*justify-content: flex-start;
				justify-content: flex-end;
				justify-content: center;
				justify-content: space-between;
				justify-content: space-around;*/
				
				/*属性5.定义项目在交叉轴上如何对齐
				 针对一行项目*/
				/*align-items: flex-end;
				align-items: center;
				align-items: baseline;*/
				/*基准线对齐,以内容文字对齐*/	
				/*align-items: stretch;*//*拉伸,把item注释才能看到效果*/		
				
				/*属性6.定义项目在交叉轴上如何对齐
				 针对多行项目*/
				/*align-content: flex-start;/*item3不会被挤下去*/
				/*align-content: flex-end;
				align-content: center;
				align-content: space-between;
				align-content: space-around;*/
			}

			.item {
				background-color: gold;
				width: 100px;
				height: 100px;
				margin: 10px;
				flex-grow: 1;
				/*属性8定义项目的放大比例，默认为0即如果存在剩余空间，也不放大*/
				flex-shrink: 1;
				/*属性9定义了项目的缩小比例，默认为1，即如果空间不足，该项目将缩小*/

			}
			#item3{
				line-height: 100px;
				/*属性7定义项目的排列顺序。数值越小，排列越靠前，默认为0*/
				/*order: -1;*/
				/*flex-grow: 2;*/
				/*flex-shrink: 2;*/
				/*属性10：理想宽高 ，优先级高于设定的宽高*/
				/*flex-basis: 200px;*/
				/*属性11:8+9+10*/
				flex: auto;
			}
		</style>
	</head>
	<body>
		<div class="container">
			<div class="item">1</div>
			<div class="item">2</div>
			<div class="item" id="item3">3</div>
		</div>
	</body>
</html>