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Detect IE version (prior to v9) in JavaScript

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半阙折子戏
半阙折子戏 2020-11-22 08:44

I want to bounce users of our web site to an error page if they\'re using a version of Internet Explorer prior to v9. It\'s just not worth our time and money to

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  • 梦谈多话
    2020-11-22 09:06

    I made a convenient underscore mixin for this.

    _.isIE();        // Any version of IE?
_.isIE(9);       // IE 9?
_.isIE([7,8,9]); // IE 7, 8 or 9?


    _.mixin({
  isIE: function(mixed) {
    if (_.isUndefined(mixed)) {
      mixed = [7, 8, 9, 10, 11];
    } else if (_.isNumber(mixed)) {
      mixed = [mixed];
    }
    for (var j = 0; j < mixed.length; j++) {
      var re;
      switch (mixed[j]) {
        case 11:
          re = /Trident.*rv\:11\./g;
          break;
        case 10:
          re = /MSIE\s10\./g;
          break;
        case 9:
          re = /MSIE\s9\./g;
          break;
        case 8:
          re = /MSIE\s8\./g;
          break;
        case 7:
          re = /MSIE\s7\./g;
          break;
      }

      if (!!window.navigator.userAgent.match(re)) {
        return true;
      }
    }

    return false;
  }
});

console.log(_.isIE());
console.log(_.isIE([7, 8, 9]));
console.log(_.isIE(11));
    <script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>

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  • 半阙折子戏
    2020-11-22 09:07

    If you need to delect IE Browser version then you can follow below code. This code working well for version IE6 to IE11 

    <!DOCTYPE html>
<html>
<body>

<p>Click on Try button to check IE Browser version.</p>

<button onclick="getInternetExplorerVersion()">Try it</button>

<p id="demo"></p>

<script>
function getInternetExplorerVersion() {
   var ua = window.navigator.userAgent;
        var msie = ua.indexOf("MSIE ");
        var rv = -1;

        if (msie > 0 || !!navigator.userAgent.match(/Trident.*rv\:11\./))      // If Internet Explorer, return version number
        {               
            if (isNaN(parseInt(ua.substring(msie + 5, ua.indexOf(".", msie))))) {
                //For IE 11 >
                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);
                        alert(rv);
                    }
                }
                else {
                    alert('otherbrowser');
                }
            }
            else {
                //For < IE11
                alert(parseInt(ua.substring(msie + 5, ua.indexOf(".", msie))));
            }
            return false;
        }}
</script>

</body>
</html>
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  • 情书的邮戳
    2020-11-22 09:08

    Detecting IE version using feature detection (IE6+, browsers prior to IE6 are detected as 6, returns null for non-IE browsers):

    var ie = (function (){
    if (window.ActiveXObject === undefined) return null; //Not IE
    if (!window.XMLHttpRequest) return 6;
    if (!document.querySelector) return 7;
    if (!document.addEventListener) return 8;
    if (!window.atob) return 9;
    if (!document.__proto__) return 10;
    return 11;
})();

    Edit: I've created a bower/npm repo for your convenience: ie-version

    Update:

    a more compact version can be written in one line as:

    return window.ActiveXObject === undefined ? null : !window.XMLHttpRequest ? 6 : !document.querySelector ? 7 : !document.addEventListener ? 8 : !window.atob ? 9 : !document.__proto__ ? 10 : 11;
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  • 后悔当初
    2020-11-22 09:10

    Conditional comments are no longer supported in IE as of Version 10 as noted on the Microsoft reference page.

    var ieDetector = function() {
  var browser = { // browser object

      verIE: null,
      docModeIE: null,
      verIEtrue: null,
      verIE_ua: null

    },
    tmp;

  tmp = document.documentMode;
  try {
    document.documentMode = "";
  } catch (e) {};

  browser.isIE = typeof document.documentMode == "number" || eval("/*@cc_on!@*/!1");
  try {
    document.documentMode = tmp;
  } catch (e) {};

  // We only let IE run this code.
  if (browser.isIE) {
    browser.verIE_ua =
      (/^(?:.*?[^a-zA-Z])??(?:MSIE|rv\s*\:)\s*(\d+\.?\d*)/i).test(navigator.userAgent || "") ?
      parseFloat(RegExp.$1, 10) : null;

    var e, verTrueFloat, x,
      obj = document.createElement("div"),

      CLASSID = [
        "{45EA75A0-A269-11D1-B5BF-0000F8051515}", // Internet Explorer Help
        "{3AF36230-A269-11D1-B5BF-0000F8051515}", // Offline Browsing Pack
        "{89820200-ECBD-11CF-8B85-00AA005B4383}"
      ];

    try {
      obj.style.behavior = "url(#default#clientcaps)"
    } catch (e) {};

    for (x = 0; x < CLASSID.length; x++) {
      try {
        browser.verIEtrue = obj.getComponentVersion(CLASSID[x], "componentid").replace(/,/g, ".");
      } catch (e) {};

      if (browser.verIEtrue) break;

    };
    verTrueFloat = parseFloat(browser.verIEtrue || "0", 10);
    browser.docModeIE = document.documentMode ||
      ((/back/i).test(document.compatMode || "") ? 5 : verTrueFloat) ||
      browser.verIE_ua;
    browser.verIE = verTrueFloat || browser.docModeIE;
  };

  return {
    isIE: browser.isIE,
    Version: browser.verIE
  };

}();

document.write('isIE: ' + ieDetector.isIE + "<br />");
document.write('IE Version Number: ' + ieDetector.Version);

    then use:

    if((ieDetector.isIE) && (ieDetector.Version <= 9))
{

}
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  • 别那么骄傲
    2020-11-22 09:10

    For ie 10 and 11:

    You can use js and add a class in html to maintain the standard of conditional comments:

      var ua = navigator.userAgent,
      doc = document.documentElement;

  if ((ua.match(/MSIE 10.0/i))) {
    doc.className = doc.className + " ie10";

  } else if((ua.match(/rv:11.0/i))){
    doc.className = doc.className + " ie11";
  }

    Or use a lib like bowser:

    https://github.com/ded/bowser

    Or modernizr for feature detection:

    http://modernizr.com/

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  • 轮回少年
    2020-11-22 09:10

    Detecting IE and its versions couldn't be easier, and all you need is a bit of native/vanilla Javascript: 

    var uA = navigator.userAgent;
var browser = null;
var ieVersion = null;

if (uA.indexOf('MSIE 6') >= 0) {
    browser = 'IE';
    ieVersion = 6;
}
if (uA.indexOf('MSIE 7') >= 0) {
    browser = 'IE';
    ieVersion = 7;
}
if (document.documentMode) { // as of IE8
    browser = 'IE';
    ieVersion = document.documentMode;
}

    And this is a way to use it: 

    if (browser == 'IE' && ieVersion <= 9) 
    document.documentElement.className += ' ie9-';

    .

    Works in all IE versions, including higher versions in lower Compatability View/Mode, and documentMode is IE proprietary.

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