Use javascript to determine the current browser_javascript skills

Written a method to determine the current browser type and version. It has only been tested on IE 8/11, Google, and 360 browser (incomplete)

We hope everyone will give us your opinions

;(function($, window, document,undefined){
  if(!window.browser){
     
    var userAgent = navigator.userAgent.toLowerCase(),uaMatch;
    window.browser = {}
     
    /**
     * 判断是否为ie
     */
    function isIE(){
      return ("ActiveXObject" in window);
    }
    /**
     * 判断是否为谷歌浏览器
     */
    if(!uaMatch){
      uaMatch = userAgent.match(/chrome\/([\d.]+)/);
      if(uaMatch!=null){
        window.browser['name'] = 'chrome';
        window.browser['version'] = uaMatch[1];
      }
    }
    /**
     * 判断是否为火狐浏览器
     */
    if(!uaMatch){
      uaMatch = userAgent.match(/firefox\/([\d.]+)/);
      if(uaMatch!=null){
        window.browser['name'] = 'firefox';
        window.browser['version'] = uaMatch[1];
      }
    }
    /**
     * 判断是否为opera浏览器
     */
    if(!uaMatch){
      uaMatch = userAgent.match(/opera.([\d.]+)/);
      if(uaMatch!=null){
        window.browser['name'] = 'opera';
        window.browser['version'] = uaMatch[1];
      }
    }
    /**
     * 判断是否为Safari浏览器
     */
    if(!uaMatch){
      uaMatch = userAgent.match(/safari\/([\d.]+)/);
      if(uaMatch!=null){
        window.browser['name'] = 'safari';
        window.browser['version'] = uaMatch[1];
      }
    }
    /**
     * 最后判断是否为IE
     */
    if(!uaMatch){
      if(userAgent.match(/msie ([\d.]+)/)!=null){
        uaMatch = userAgent.match(/msie ([\d.]+)/);
        window.browser['name'] = 'ie';
        window.browser['version'] = uaMatch[1];
      }else{
        /**
         * IE10
         */
        if(isIE() && !!document.attachEvent && (function(){"use strict";return !this;}())){
          window.browser['name'] = 'ie';
          window.browser['version'] = '10';
        }
        /**
         * IE11
         */
        if(isIE() && !document.attachEvent){
          window.browser['name'] = 'ie';
          window.browser['version'] = '11';
        }
      }
    }
 
    /**
     * 注册判断方法
     */
    if(!$.isIE){
      $.extend({
        isIE:function(){
          return (window.browser.name == 'ie');
        }
      });
    }
    if(!$.isChrome){
      $.extend({
        isChrome:function(){
          return (window.browser.name == 'chrome');
        }
      });
    }
    if(!$.isFirefox){
      $.extend({
        isFirefox:function(){
          return (window.browser.name == 'firefox');
        }
      });
    }
    if(!$.isOpera){
      $.extend({
        isOpera:function(){
          return (window.browser.name == 'opera');
        }
      });
    }
    if(!$.isSafari){
      $.extend({
        isSafari:function(){
          return (window.browser.name == 'safari');
        }
      });
    }
  }
})(jQuery, window, document);

//How to use

console.log(window.browser);
console.log($.isIE());
console.log($.isChrome());

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