js判断浏览器信息大全

js判断浏览器信息大全，详情如下。
可以直接引入js文件。

---

/*
 * 描述：判断浏览器信息
 * 编写：LittleQiang_w
 * 日期：2016.1.5
 * 版本：V1.1
 */

//判断当前浏览类型
function BrowserType() {
  var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
  var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器
  var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器
  var isEdge = userAgent.indexOf("Windows NT") > -1 && userAgent.indexOf("Trident/7.0;") > -1 && !isIE; //判断是否IE的Edge浏览器
  var isFF = userAgent.indexOf("Firefox") > -1; //判断是否Firefox浏览器
  var isSafari = userAgent.indexOf("Safari") > -1 && userAgent.indexOf("Chrome") == -1; //判断是否Safari浏览器
  var isChrome = userAgent.indexOf("Chrome") > -1 && userAgent.indexOf("Safari") > -1; //判断Chrome浏览器

  if (isIE) {
    var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
    reIE.test(userAgent);
    var fIEVersion = parseFloat(RegExp["$1"]);
    if (fIEVersion == 7) {
      return "IE7";
    } else if (fIEVersion == 8) {
      return "IE8";
    } else if (fIEVersion == 9) {
      return "IE9";
    } else if (fIEVersion == 10) {
      return "IE10";
    } else if (fIEVersion == 11) {
      return "IE11";
    } else {
      return "0"
    } //IE版本过低
  } //isIE end

  if (isFF) {
    return "FF";
  }
  if (isOpera) {
    return "Opera";
  }
  if (isSafari) {
    return "Safari";
  }
  if (isChrome) {
    return "Chrome";
  }
  if (isEdge) {
    return "Edge";
  }
} //myBrowser() end

//判断是否是IE浏览器
function isIE() {
  var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
  var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器
  if (isIE) {
    return "1";
  } else {
    return "-1";
  }
}

//判断是否是IE浏览器，包括Edge浏览器
function IEVersion() {
  var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
  var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器
  var isEdge = userAgent.indexOf("Windows NT 6.1; Trident/7.0;") > -1 && !isIE; //判断是否IE的Edge浏览器
  if (isIE) {
    var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
    reIE.test(userAgent);
    var fIEVersion = parseFloat(RegExp["$1"]);
    if (fIEVersion == 7) {
      return "IE7";
    } else if (fIEVersion == 8) {
      return "IE8";
    } else if (fIEVersion == 9) {
      return "IE9";
    } else if (fIEVersion == 10) {
      return "IE10";
    } else if (fIEVersion == 11) {
      return "IE11";
    } else {
      return "0"
    } //IE版本过低
  } else if (isEdge) {
    return "Edge";
  } else {
    return "-1"; //非IE
  }
}

if (!Array.prototype.indexOf) {
  Array.prototype.indexOf = function(elt /*, from*/)
  {
    var len = this.length >>> 0;

    var from = Number(arguments[1]) || 0;
    from = (from < 0)
         ? Math.ceil(from)
         : Math.floor(from);
    if (from < 0)
      from += len;

    for (; from < len; from++)
    {
      if (from in this &&
          this[from] === elt)
        return from;
    }
    return -1;
  };
}

(function(document) {
  var ieVersions = ['IE7', 'IE8', 'IE9', 'IE10', 'IE11', 'Edge'];
  var browserType = BrowserType();
  if (ieVersions.indexOf(browserType) > -1 && ieVersions.indexOf(browserType) < 4) {
    var script = document.createElement('script');
    script.src = './js/polyfill/es5+6-polyfill.js';
    var head = document.head || document.getElementsByTagName("head")[0];
    head.appendChild(script);
  }
  if (ieVersions.indexOf(browserType) > 3) {
    var script = document.createElement('script');
    script.src = './js/polyfill/es6-polyfill.js';
    document.head.appendChild(script);
  }
})(document);