css定位的三种选择器
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
p {
color:red;
}
</style>
</head>
<body>
<!--
标签选择器:
语法: 标签名 {
属性键:属性值;
}
-->
<p>itcast传智播客</p>
<p>itcast传智播客</p>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
#one {
color:red;
}
</style>
</head>
<body>
<!--
ID属性唯一标识符.
要确保页面当中id属性的唯一性.
ID选择器:
语法: #ID {
属性键:属性值;
}
-->
<p id="one" >itcast传智播客</p>
<p>itcast传智播客</p>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
.one {
color:green;
}
</style>
</head>
<body>
<!--
class属性可以随意重复.
CLASS选择器:
语法: .CLASS名称 {
属性键:属性值;
}
-->
<p class="one" >itcast传智播客</p>
<p>itcast传智播客</p>
<p>itcast传智播客</p>
<p class="one" >itcast传智播客</p>
<h1 class="one" >itcast传智播客</h1>
</body>
</html>
