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3月21作业2
威灵仙的博客
Original
438 people have browsed it

实例

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>2.属性选择器</title>
	<style type="text/css">
		/*元素选择器*/
		ul {   
			padding: 0;
			margin: 0;
			width: 450px;
			border: 1px dashed #666;
			padding: 10px 5px;
		}

		ul:after {  /*子块撑开父块*/
			content:'';  /*在子元素尾部添加空内容元素*/
			display: block;  /*并设置为块级显示*/
			clear:both;   /*清除二边的浮动*/
		}
		
		li { 
			list-style: none; /*去掉默认列表项样式*/
			float: left;  /*左浮动*/
			width: 40px;  /*设置宽度*/
			height: 40px; /*设置高度*/
			line-height: 40px; /*文本垂直居中*/
			text-align: center; /*文本水平居中*/
			border-radius: 50%; /*设置边框圆角*/				
			background: skyblue; /*背景色天蓝*/
			margin-right: 5px; /*每个球之间的右外边距*/
		}
		
		/*根据属性名来选择:例如id属性*/
		*[id] {   /*等价于:  li[id]*/
			/*background-color: red;*/
		}

		/*根据属性名与值来选择:例如选择class="green"的元素*/
		li[class="green"] {
			/*background-color: lightgreen;*/
		}

		/*选择class属性值中包括指定单词的元素*/
		li[class ~= "red"] {
			background-color: brown;
		}
		
		/*选择以'ph'字母开头的class类样式元素*/
		li[class ^= "ph"] {
			background-color: coral;
		}

		/*选择以's'结尾的类样式元素*/
		li[class $= "s"] {
			background-color: lime;  /*青绿*/
		}

		/*选择属性值中包括指定字母'e'的类样式元素:;*/
		li[class *= "e"] {
			background-color: yellowgreen;  /*234背景为黄绿色*/
		}




	</style>
</head>
<body>
	<ul>
		<li id="item1">1</li>
		<li class="green">2</li>
		<li class="green red">3</li>
		<li class="red">4</li>
		<li>5</li>
		<li id="item2">6</li>
		<li class="php">7</li>
		<li class="php css">8</li>
		<li>9</li>
		<li>10</li>
	</ul>
</body>
</html>

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