Collection
Collection
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <div> <a href="http://www.baidu.com" target="fr">百度</a> <a href="goods.html" target="fr">商品表</a> <a href="http://www.hao123.com" target="fr">hao123</a> </div> <iframe src="iframe.html" name="fr" frameborder="0" width="800" height="700"></iframe> </body> </html>
点击 "运行实例" 按钮查看在线实例
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
//css样式设置的优先级
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
#week {
color: red;
}
.week {
color: yellow;
}
p {
color: blue;
}
</style>
</head>
<body>
<p id="week" class="week">今天是周末</p> //验证id选择器，样式选择器，标签选择器优先级
<p class="week">今天是周末</p>//验证样式选择器和标签选择器优先级
<p>今天是周末</p>//标签选择器
</body>
</html>点击 "运行实例" 按钮查看在线实例
