js判断浏览器信息大全

/*
* 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);