例如：在页面嵌套上显示百度
<iframe src="url"></iframe>显示其他url也可以
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Title</title> </head> <body> <iframe src="http://www.baidu.com"></iframe> </body> </html>
