JS判断页面是否在PC端打开以及系统种类或者苹果端或者微信端和浏览器种类版本

JS判断页面是否在PC端打开以及系统种类或者苹果端或者微信端和浏览器种类版本

网页是否在 PC 端打开，可以帮助我们对页面进行调整，判断系统种类方便我们统计信息，判断浏览器种类版本，方便我们处理兼容问题，参考代码如下：

// 页面在pc端打开时，返回true；否则返回false
function checkPC(){var agentstr = LowerCase();// var agentstr = req.headers['user-agent'].toLowerCase();  // nodejsvar agentreg = /(iphone|ipod|ipad|android|symbianos|windows phone|playbook|mobile)/;var agentph = agentstr.match(agentreg);if(agentph){return false;}else{return true;}
}// 判断操作系统  Mac Unix Linux Win2000 Win2003 WinXP WinVista Win7 other
function checkOS(){var ua = navigator.userAgent;var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");var isMac = (navigator.platform == "Mac68K") || (navigator.platform == "MacPPC") || (navigator.platform == "Macintosh") || (navigator.platform == "MacIntel");if (isMac) return "Mac";var isUnix = (navigator.platform == "X11") && !isWin && !isMac;if (isUnix) return "Unix";var isLinux = (String(navigator.platform).indexOf("Linux") > -1);if (isLinux) return "Linux";if (isWin) {var isWin2K = ua.indexOf("Windows NT 5.0") > -1 || ua.indexOf("Windows 2000") > -1;if (isWin2K) return "Win2000";var isWinXP = ua.indexOf("Windows NT 5.1") > -1 || ua.indexOf("Windows XP") > -1;if (isWinXP) return "WinXP";var isWin2003 = ua.indexOf("Windows NT 5.2") > -1 || ua.indexOf("Windows 2003") > -1;if (isWin2003) return "Win2003";var isWinVista= ua.indexOf("Windows NT 6.0") > -1 || ua.indexOf("Windows Vista") > -1;if (isWinVista) return "WinVista";var isWin7 = ua.indexOf("Windows NT 6.1") > -1 || ua.indexOf("Windows 7") > -1;if (isWin7) return "Win7";}return "other";
}// 页面由苹果设备打开时，返回true；否则返回false
function checkApple(){var ua = navigator.userAgent;if(/AppleWebKit.*st(ua) || (/MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/.test(ua))){if(/iPhone|mac|iPod|st(ua)){return true;} else {return false;}} else if(ua.indexOf('iPad') > -1){return true;}else{return false;}
}// 页面由微信打开时，返回true；否则返回false
function checkWeixin(){  var ua = LowerCase();  if(ua.match(/MicroMessenger/i) == "micromessenger") {  return true;  } else {  return false;  }  
}  // 获取浏览器种类和版本
function checkBrowser(){var ua = LowerCase();var reg_ie = /msie [d.]+;/gi;var reg_ff = /firefox/[d.]+/gi;var reg_chrome = /chrome/[d.]+/gi;var reg_saf = /safari/[d.]+/gi;var reg_opr = /opr/[d.]+/gi;if(ua.indexOf("msie") > 0){return ua.match(reg_ie)[0];}// IE11版本中不包括MSIE字段if(ua.indexOf("trident") > 0 && ua.indexOf("rv") > 0){return "IE " + ua.match(/rv:(d+.d+)/)[1];}if(ua.indexOf("firefox") > 0){return ua.match(reg_ff)[0];}if(ua.indexOf("safari") > 0 && ua.indexOf("opr") > 0){return ua.match(reg_opr)[0];}if(ua.indexOf("safari") > 0 && ua.indexOf("chrome") < 0){return ua.match(reg_saf)[0];}if(ua.indexOf("chrome") > 0){return ua.match(reg_chrome)[0];}
}