目前用到的API，看代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>
<div id="example"></div>
<script>
txt = "<p>浏览器代号: " + navigator.appCodeName + "</p>";
txt+= "<p>浏览器名称: " + navigator.appName + "</p>";
txt+= "<p>浏览器版本: " + navigator.appVersion + "</p>";
txt+= "<p>启用Cookies: " + navigator.cookieEnabled + "</p>";
txt+= "<p>硬件平台: " + navigator.platform + "</p>";
txt+= "<p>用户代理: " + navigator.userAgent + "</p>";
txt+= "<p>用户代理语言: " + navigator.systemLanguage + "</p>";
txt+= "<p>浏览器是否连网在线: " + navigator.onLine + "</p>";
txt+= "<p>浏览器网络链接信息: " + navigator.connection.effectiveType + "</p>";
document.getElementById("example").innerHTML=txt;
</script>
</body>
</html>
