h5 Meta基础知识

    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
    <!-- 设置页面缩放 -->
    <!-- 方法一：直接设置meta-viewort属性 -->
    <meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" />
    <!-- 方法二：使用JS动态添加viewport -->
    <script>
        var phoneWidth =  parseInt(window.screen.width);
        var phoneScale = phoneWidth/640;
        var ua = navigator.userAgent;
        if (/Android (\d+\.\d+)/.test(ua)){
            var version = parseFloat(RegExp.$1);
            if(version>2.3){
                document.write('<meta name="viewport" content="width=640, minimum-scale = '+phoneScale+', maximum-scale = '+phoneScale+', target-densitydpi=device-dpi">');
            }else{
                document.write('<meta name="viewport" content="width=640, target-densitydpi=device-dpi">');
            }
        } else {
            document.write('<meta name="viewport" content="width=640, user-scalable=no, target-densitydpi=device-dpi">');
        }
    </script>


    <!-- 常用meta设置 -->
    <!-- 当网站添加到主屏幕快速启动方式，可隐藏地址栏，仅针对IOS的Safari -->
    <meta name="apple-mobile-web-app-capable" content="yes" />
    <!-- 将网站添加到主屏幕快速启动方式，仅针对IOS的Safari顶端状态条的样式 -->
    <meta name="apple-mobile-web-app-status-bar-style" content="black" />
    <!-- 忽略将页面中的数字识别为电话号码,忽略Android平台中对邮箱地址的识别 -->
    <meta name="format-detection"content="telephone=no, email=no" />

    
    <!-- 其他meta设置 -->
    <!-- 启用360浏览器的极速模式(webkit) -->
    <meta name="renderer" content="webkit">
    <!-- 避免IE使用兼容模式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- 针对手持设备优化，主要是针对一些老的不识别viewport的浏览器，比如黑莓 -->
    <meta name="HandheldFriendly" content="true">
    <!-- 微软的老式浏览器 -->
    <meta name="MobileOptimized" content="320">
    <!-- uc强制竖屏 -->
    <meta name="screen-orientation" content="portrait">
    <!-- QQ强制竖屏 -->
    <meta name="x5-orientation" content="portrait">
    <!-- UC强制全屏 -->
    <meta name="full-screen" content="yes">
    <!-- QQ强制全屏 -->
    <meta name="x5-fullscreen" content="true">
    <!-- UC应用模式 -->
    <meta name="browsermode" content="application">
    <!-- QQ应用模式 -->
    <meta name="x5-page-mode" content="app">
    <!-- windows phone 点击无高光 -->
    <meta name="msapplication-tap-highlight" content="no">