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How to detect IE11?

由 只谈情不闲聊 提交于 2019-12-16 20:02:53

问题


When I want to detect IE I use this code:

function getInternetExplorerVersion()
{
  var rv = -1;
  if (navigator.appName == 'Microsoft Internet Explorer')
  {
    var ua = navigator.userAgent;
    var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
    if (re.exec(ua) != null)
      rv = parseFloat( RegExp.$1 );
  }
  return rv;
}
function checkVersion()
{
  var msg = "You're not using Internet Explorer.";
  var ver = getInternetExplorerVersion();

  if ( ver > -1 )
  {
    msg = "You are using IE " + ver;
  }
  alert( msg );
}

But IE11 is returning "You're not using Internet Explorer". How can I detect it?


回答1:


IE11 no longer reports as MSIE, according to this list of changes it's intentional to avoid mis-detection.

What you can do if you really want to know it's IE is to detect the Trident/ string in the user agent if navigator.appName returns Netscape, something like (the untested);

function getInternetExplorerVersion()
{
  var rv = -1;
  if (navigator.appName == 'Microsoft Internet Explorer')
  {
    var ua = navigator.userAgent;
    var re = new RegExp("MSIE ([0-9]{1,}[\\.0-9]{0,})");
    if (re.exec(ua) != null)
      rv = parseFloat( RegExp.$1 );
  }
  else if (navigator.appName == 'Netscape')
  {
    var ua = navigator.userAgent;
    var re  = new RegExp("Trident/.*rv:([0-9]{1,}[\\.0-9]{0,})");
    if (re.exec(ua) != null)
      rv = parseFloat( RegExp.$1 );
  }
  return rv;
}

console.log('IE version:', getInternetExplorerVersion());

Note that IE11 (afaik) still is in preview, and the user agent may change before release.




回答2:


Use !(window.ActiveXObject) && "ActiveXObject" in window to detect IE11 explicitly.

To detect any IE (pre-Edge, "Trident") version, use "ActiveXObject" in window instead.




回答3:


Use MSInputMethodContext as part of a feature detection check. For example:

//Appends true for IE11, false otherwise
window.location.hash = !!window.MSInputMethodContext && !!document.documentMode;

References

  • MSInputMethodContext Object
  • Input Method Editor API
  • What I’d like to see in IE12: Internet Explorer 12 Wishlist of Bug Fixes and New Features
  • TypeScript/lib.dom.d.ts at master · Microsoft/TypeScript IE DOM APIs



回答4:


I've read your answers and made a mix. It seems to work with Windows XP(IE7/IE8) and Windows 7 (IE9/IE10/IE11).

function ie_ver(){  
    var iev=0;
    var ieold = (/MSIE (\d+\.\d+);/.test(navigator.userAgent));
    var trident = !!navigator.userAgent.match(/Trident\/7.0/);
    var rv=navigator.userAgent.indexOf("rv:11.0");

    if (ieold) iev=new Number(RegExp.$1);
    if (navigator.appVersion.indexOf("MSIE 10") != -1) iev=10;
    if (trident&&rv!=-1) iev=11;

    return iev;         
}

Of course if I return 0, means no IE.




回答5:


Get IE Version from the User-Agent

var ie = 0;
try { ie = navigator.userAgent.match( /(MSIE |Trident.*rv[ :])([0-9]+)/ )[ 2 ]; }
catch(e){}

How it works: The user-agent string for all IE versions includes a portion "MSIE space version" or "Trident other-text rv space-or-colon version". Knowing this, we grab the version number from a String.match() regular expression. A try-catch block is used to shorten the code, otherwise we'd need to test the array bounds for non-IE browsers.

Note: The user-agent can be spoofed or omitted, sometimes unintentionally if the user has set their browser to a "compatibility mode". Though this doesn't seem like much of an issue in practice.

Get IE Version without the User-Agent

var d = document, w = window;
var ie = ( !!w.MSInputMethodContext ? 11 : !d.all ? 99 : w.atob ? 10 : 
d.addEventListener ? 9 : d.querySelector ? 8 : w.XMLHttpRequest ? 7 : 
d.compatMode ? 6 : w.attachEvent ? 5 : 1 );

How it works: Each version of IE adds support for additional features not found in previous versions. So we can test for the features in a top-down manner. A ternary sequence is used here for brevity, though if-then and switch statements would work just as well. The variable ie is set to an integer 5-11, or 1 for older, or 99 for newer/non-IE. You can set it to 0 if you just want to test for IE 1-11 exactly.

Note: Object detection may break if your code is run on a page with third-party scripts that add polyfills for things like document.addEventListener. In such situations the user-agent is the best option.

Detect if the Browser is Modern

If you're only interested in whether or not a browser supports most HTML 5 and CSS 3 standards, you can reasonably assume that IE 8 and lower remain the primary problem apps. Testing for window.getComputedStyle will give you a fairly good mix of modern browsers, as well (IE 9, FF 4, Chrome 11, Safari 5, Opera 11.5). IE 9 greatly improves on standards support, but native CSS animation requires IE 10.

var isModernBrowser = ( !document.all || ( document.all && document.addEventListener ) );



回答6:


Angular JS does this way.

msie = parseInt((/msie (\d+)/.exec(navigator.userAgent.toLowerCase()) || [])[1]);
if (isNaN(msie)) {
  msie = parseInt((/trident\/.*; rv:(\d+)/.exec(navigator.userAgent.toLowerCase()) || [])[1]);
}

msie will be positive number if its IE and NaN for other browser like chrome,firefox.

why ?

As of Internet Explorer 11, the user-agent string has changed significantly.

refer this :

msdn #1 msdn #2




回答7:


solution : 

function GetIEVersion() {
  var sAgent = window.navigator.userAgent;
  var Idx = sAgent.indexOf("MSIE");
  // If IE, return version number.
  if (Idx > 0)
    return parseInt(sAgent.substring(Idx+ 5, sAgent.indexOf(".", Idx)));

  // If IE 11 then look for Updated user agent string.
  else if (!!navigator.userAgent.match(/Trident\/7\./))
    return 11;

  else
    return 0; //It is not IE

}
if ((GetIEVersion() > 0) || (navigator.userAgent.toLowerCase().indexOf('firefox') > -1)){
  alert("This is IE " + GetIEVersion());
}else {
  alert("This no is IE ");
}



回答8:


I'm using a simpler method:

The navigator global object has a property touchpoints, in Internet Exlorer 11 is called msMaxTouchPoints tho.

So if you look for:

navigator.msMaxTouchPoints !== void 0

You will find Internet Explorer 11.




回答9:


var ua = navigator.userAgent.toString().toLowerCase();
var match = /(trident)(?:.*rv:([\w.]+))?/.exec(ua) ||/(msie) ([\w.]+)/.exec(ua)||['',null,-1];
var rv = match[2];
return rv;



回答10:


Try This:

var trident = !!navigator.userAgent.match(/Trident\/7.0/);
var net = !!navigator.userAgent.match(/.NET4.0E/);
var IE11 = trident && net
var IEold = ( navigator.userAgent.match(/MSIE/i) ? true : false );
if(IE11 || IEold){
alert("IE")
}else{
alert("Other")
}



回答11:


This appears to be a better method. "indexOf" returns -1 if nothing is matched. It doesn't overwrite existing classes on the body, just adds them.

// add a class on the body ie IE 10/11
var uA = navigator.userAgent;
if(uA.indexOf('Trident') != -1 && uA.indexOf('rv:11') != -1){
    document.body.className = document.body.className+' ie11';
}
if(uA.indexOf('Trident') != -1 && uA.indexOf('MSIE 10.0') != -1){
    document.body.className = document.body.className+' ie10';
}



回答12:


Detect most browsers with this:

var getBrowser = function(){
  var navigatorObj = navigator.appName,
      userAgentObj = navigator.userAgent,
      matchVersion;
  var match = userAgentObj.match(/(opera|chrome|safari|firefox|msie|trident)\/?\s*(\.?\d+(\.\d+)*)/i);
  if( match && (matchVersion = userAgentObj.match(/version\/([\.\d]+)/i)) !== null) match[2] = matchVersion[1];
  //mobile
  if (navigator.userAgent.match(/iPhone|Android|webOS|iPad/i)) {
    return match ? [match[1], match[2], mobile] : [navigatorObj, navigator.appVersion, mobile];
  }
  // web browser
  return match ? [match[1], match[2]] : [navigatorObj, navigator.appVersion, '-?'];
};

https://gist.github.com/earlonrails/5266945




回答13:


I used the onscroll event at the element with the scrollbar. When triggered in IE, I added the following validation:

onscroll="if (document.activeElement==this) ignoreHideOptions()"



回答14:


Only for IE Browser:

var ie = 'NotIE'; //IE5-11, Edge+
    if( !!document.compatMode ) {
        if( !("ActiveXObject" in window) ) ) ie = 'EDGE';
        if( !!document.uniqueID){
            if('ActiveXObject' in window && !window.createPopup ){ ie = 11; }
            else if(!!document.all){
                    if(!!window.atob){ie = 10;}
                    else if(!!document.addEventListener) {ie = 9;}
                    else if(!!document.querySelector){ie = 8;}
                    else if(!!window.XMLHttpRequest){ie = 7;}
                    else if(!!document.compatMode){ie = 6;}
                    else ie = 5;
                }
        }
    }

use alert(ie);

Testing: 

var browserVersionExplorer = (function() {
    var ie = '<s>NotIE</s>',
        me = '<s>NotIE</s>';

    if (/msie\s|trident\/|edge\//i.test(window.navigator.userAgent) && !!(document.documentMode || document.uniqueID || window.ActiveXObject || window.MSInputMethodContext)) {
            if (!!window.MSInputMethodContext) {
                ie = !("ActiveXObject" in window) ? 'EDGE' : 11;
            } else if (!!document.uniqueID) {
                if (!!(window.ActiveXObject && document.all)) {
                    if (document.compatMode == "CSS1Compat" && !!window.DOMParser ) {
                        ie = !!window.XMLHttpRequest ? 7 : 6;
                    } else {
                        ie = !!(window.createPopup && document.getElementById) ? parseFloat('5.5') : 5;
                    }
                    if (!!document.documentMode && !!document.querySelector ) {
                        ie = !!(window.atob && window.matchMedia) ? 10 : ( !!document.addEventListener ? 9 : 8);
                    }
                } else ie = !!document.all ? 4 : (!!window.navigator ? 3 : 2);
            }
        }
        
    return ie > 1 ? 'IE ' + ie : ie;
})();

 alert(browserVersionExplorer);

Update 01 Jun 2017

Now we could use something easier and simpler: 

var uA = window.navigator.userAgent,
    onlyIEorEdge = /msie\s|trident\/|edge\//i.test(uA) && !!( document.uniqueID || window.MSInputMethodContext),
    checkVersion = (onlyIEorEdge && +(/(edge\/|rv:|msie\s)([\d.]+)/i.exec(uA)[2])) || NaN;



回答15:


Quite frankly I would say use a library that does what you need (like platform.js for example). At some point things will change and the library will be equipped for those changes and manual parsing using regular expressions will fail.

Thank god IE goes away...



来源：https://stackoverflow.com/questions/17907445/how-to-detect-ie11

标签
internet-explorer
debugging
internet-explorer-11
browser-detection
forward-compatibility
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