我不知道为什么，但我没有像其他人一样在userAgent中看到边缘谈论，所以我不得不采取另一条路线，可能会帮助一些人。

而不是看着navigator.userAgent，我看着navigator.appName来区分是否它是IE

在我们确定浏览器是IE11或Edge之后，我再看看navigator.appVersion。我注意到在IE11中，字符串很长，其中有很多信息。我随意挑选了三叉戟这个词，它绝对不在导航器的边缘.app版本中。测试这个词允许我区分这两个。

下面是一个函数，它将返回用户所在的Internet Explorer的数值。

祝你好运，我希望这有助于你！

 函数Check_Version（）{
 var rv = -1; //返回值假定失败。 

 if（navigator.appName =='Microsoft Internet Explorer'）{

 var ua = navigator.userAgent，
 re = new RegExp（MSIE（[ 0-9] {1，} [\\.0-9] {0，}））; 

 if（re.exec（ua）！== null）{
 rv = parseFloat（RegExp。$ 1）; 


 else if（navigator.appName ==Netscape）{
 ///在IE 11中navigator.appVersion表示'trident'
 / //在Edge中navigator.appVersion不会说三叉戟
 if（navigator.appVersion.indexOf（'Trident'）=== -1）rv = 12; 
 else rv = 11; 
} 

 return rv; 
} 
 

I have looked around a lot, and I understand that there are a lot of ways to detect internet explorer. My problem is this: I have an area on my HTML doc, that when clicked, calls a javascript function that is incompatible with internet explorer of any kind. I wish to detect if IE is being used, and if so, set a variable as true. The problem is, I am writing my code out of notepad ++, and when I run the HTML code in browser, none of the methods to detect IE wok. I think the problem is that I am running it out of notepad++. I need to be able to detect IE, so that based on the variable, I can disable that area of the site. I have tried this:

/* Write JavaScript here */
var isIE10 = false;

if (navigator.userAgent.indexOf("MSIE 10") > -1) {
    // this is internet explorer 10
    isIE10 = true;
   window.alert(isIE10);
}

var isIE = (navigator.userAgent.indexOf("MSIE") != -1);

if(isIE){
    if(!isIE10){
    window.location = 'pages/core/ie.htm';
    }
}

but it doesn't work. How can i detect IE out of notepad++? that's what I'm testing the HTML out of, but I need a method that'll work with that and on a website. HELP!

edit

I notice someone marked this as a duplicate, and that is understandable. I suppose I wasnt clear. I cannot use a JQuery answer, so this is not a duplicate as I am asking for a vanilla JS answer.

Edit #2 is there also a way to detect the edge browser?

I don't know why, but I'm not seeing "Edge" in the userAgent like everyone else is talking about, so I had to take another route that may help some people.

Instead of looking at the navigator.userAgent, I looked at navigator.appName to distinguish if it was IE<=10 or IE11 and Edge. IE11 and Edge use the appName of "Netscape", while every other iteration uses "Microsoft Internet Explorer".

After we determine that the browser is either IE11 or Edge, I then looked to navigator.appVersion. I noticed that in IE11 the string was rather long with a lot of information inside of it. I arbitrarily picked out the word "Trident", which is definitely not in the navigator.appVersion for Edge. Testing for this word allowed me to distinguish the two.

Below is a function that will return a numerical value of which Internet Explorer the user is on. If on Microsoft Edge it returns the number 12.

Good luck and I hope this helps!

function Check_Version(){
    var rv = -1; // Return value assumes failure.

    if (navigator.appName == 'Microsoft Internet Explorer'){

       var ua = navigator.userAgent,
           re  = new RegExp("MSIE ([0-9]{1,}[\\.0-9]{0,})");

       if (re.exec(ua) !== null){
         rv = parseFloat( RegExp.$1 );
       }
    }
    else if(navigator.appName == "Netscape"){                       
       /// in IE 11 the navigator.appVersion says 'trident'
       /// in Edge the navigator.appVersion does not say trident
       if(navigator.appVersion.indexOf('Trident') === -1) rv = 12;
       else rv = 11;
    }       

    return rv;          
}