1.meta tag http-equiv attribute syntax format:
<meta http-equiv="expires" content="wed,20 Jun 2007 22:33:00 GMT"/> <!--expires 期限,可用于网页的到期时间,一旦网页过期,必须到服务器上重新传输-->
2.content-type (display character set setting) settings page use Character set
<meta http-equiv="content-type" content="text/html" charset="utf-8"/>
3.keywords (Keywords)
<meta http-equiv="Keywords" content="keywords1,keywords2...."/>
4.description (Description)
<meta http-equiv="description" content="this is my page"/>
5.format-detection Format detection
1 Ignore recognizing the numbers on the page as phone numbers
<meta http-equiv="format-detection" content="telephone=no"/>
2 Tell the device not to recognize the email address , it will not be sent automatically after clicking.
<meta http-equiv="format-detection" content="email=no"/>
#6.viewport
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
initial-scale:[0.0-1.0] Define the initial scaling ratio
minimum- scale:[0.0-1.0] Define the minimum zoom ratio
Maximum-scale:[0.0-1.0] Define the maximum zoom ratio
User-scalable: yes/no Whether the user is allowed to manually zoom the page
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