JS判斷PC作業系統版本

var version = navigator.userAgent;
console.log(version);
//"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3223.0 Safari/537.36" 
if(version.indexOf("Windows NT 5")!=-) { 
    console.log("這是XP系統");
}else if(version.indexOf("Windows NT 7")!=-){
    console.log("這是win7系統");
}else if(version.indexOf("Windows NT 10")!=-){
    console.log("這是win10系統");
}

//navigator.platform 檢測裝置平台