识别主流浏览器类型和版本

检测主流浏览器 (IE,Opera,Chrome,Firefox, Safari 的类型和版本），具体看代码，如果有问题，欢迎留言
var Browser = (function(window) {
var agent = window.navigator.userAgent;
var IE10 = ‘IE10’; //IE10 及以下
var IE11 = ‘IE11’;
var Edge = ‘Edge’;
var Opera = ‘Opera’;
var Chrome = ‘Chrome’;
var Firefox = ‘Firefox’;
var Safari = ‘Safari’;
var System = {
type: ”,
version: ”,
getIe10Version: function() {
try {
return agent.match(/MSIE ([\d.]+)/)[1] || ‘0’;
} catch (e) {
console.log(e);
return ‘0’;
}
},
operaVersion: function() {
try {
if (agent.indexOf(‘Opera’) > -1) {
return agent.match(/Opera.([\d.]+)/)[1];
} else {
return agent.match(/OPR\/([\d.]+)/)[1];
}
} catch (e) {
console.log(e);
return 0;
}
},
// 描述:version 过滤. 如 31.0.252.152 只保留 31.0
versionFilter: function() {
if (arguments.length === 1 && typeof arguments[0] === ‘string’) {
var version = arguments[0];
var start, end;
start = version.indexOf(‘.’);
if (start > 0) {
end = version.indexOf(‘.’, start + 1);
if (end !== -1) {
return version.substr(0, end);
}
}
return version;
} else if (arguments.length === 1) {
return arguments[0];
}
return 0;
},
};

try {
// 检测浏览器类型
if (/MSIE/.test(agent)) {
System.type = IE10;
} else if (/rv:([\d.]+)\) like gecko/.test(agent.toLowerCase())) {
System.type = IE11;
} else if (agent.indexOf(‘Edge’) > -1) {
System.type = Edge;
} else if (agent.indexOf(‘Opera’) > -1 || agent.indexOf(‘OPR’) > -1) {
System.type = Opera;
} else if (agent.indexOf(‘Chrome’) > -1 && agent.indexOf(‘Safari’) > -1) {
System.type = Chrome;
} else if (agent.indexOf(‘Safari’) > -1 && agent.indexOf(‘Chrome’) === -1) {
System.type = Safari;
} else if (agent.indexOf(‘Firefox’) > -1) {
System.type = Firefox;
} else {
System.type = ‘unknow’;
}
// 版本号
switch (System.type) {
case IE10:
System.version = System.getIe10Version();
break;
case IE11:
System.version = ’11’;
break;
case Edge:
System.version = ‘edge’;
break;
case Firefox:
System.version = agent.match(/Firefox\/([\d.]+)/)[1];
break;
case Chrome:
System.version = agent.match(/Chrome\/([\d.]+)/)[1];
break;
case Opera:
System.version = System.operaVersion();
break;
case Safari:
System.version = agent.match(/Version\/([\d.]+)/)[1];
break;
default:
System.version = ‘0’;
}
System.version = System.versionFilter(System.version);
console.log(System.type,System.version);
} catch (e) {
console.log(e);
}
})(window);