1、html5基本格式
<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> </head> <body> </body> </html>
2、移动端viewport
1 <meta name="viewport" content="width=device-width, initial-scale=1.0,minimun-scale=1.0,maximum-scale=5.0,user-scalable=no">