Javascript 通过useragent判断浏览器
阅读(29347)useragent是浏览器版本核心的标识，本来就是用来作为浏览器判断用的，虽然有时候可恶的壳子浏览器会修改useragent导致我们判断错误，但这不应该成为我们不使用useragent来判断浏览器的原因。
有时候我们可能在简单的页面里需要来判断一下浏览器，如果为了这个判断引入一个库那很浪费，故搞了个方法，兼容到目前最新的IE11：
/*
ie6: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)
ie7: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET4.0E; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C)
ie8: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET4.0E; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C)
ie9: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)
ie10: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)
ie11: Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv 11.0) like Gecko
chrome: mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, like gecko) chrome/31.0.1650.57 safari/537.36
firefox: mozilla/5.0 (windows nt 6.1; wow64; rv:28.0) gecko/20100101 firefox/28.0
Safari: Mozilla/5.0 (Windows; U; Windows NT 6.1; tr-TR) AppleWebKit/533.20.25 (KHTML, like Gecko) Version/5.0.4 Safari/533.20.27
Opera: {
9.8之前: Opera/9.70 (Linux ppc64 ; U; en) Presto/2.2.1
9.8之后: Opera/9.80 (X11; Linux x86_64; U; en) Presto/2.2.15 Version/10.00
}
Maxthon: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/533.1 (KHTML, like Gecko) Maxthon/3.0.8.2 Safari/533.1
*/
var uaMatch = (function(){
var ua = navigator.userAgent.toLowerCase(),
rUA = [
/ms(ie)\s([\d.]+)/i,
/(chrome)\/([\d.]+)/i,
/(firefox)\/([\d.]+)/i,
/version\/([\d.]+)\s(safari)/i,
/(opera)\/([\d.]+)/i,
/(maxthon)\/([\d.]+)/i
],
matches;
//如果匹配成功则直接退出循环
for(var i = 0; i < rUA.length; i++){
matches = ua.match(rUA[i]);
if(matches){
break;
}
}
//if ie11
if(!matches){
var rUAIE11 = /trident\/[0-9].*rv[ :]([0-9.]+)/i,
temp;
matches = ua.match(rUAIE11);
if(matches){
temp = matches[1];
matches[1] = 'ie';
matches[2] = temp;
}
}
//if opera after 9.8
if(matches && matches[1].toLowerCase() === 'opera'){
var rUAOpera = /(opera).*version\/([\d.]+)/i,
temp = ua.match(rUAOpera);
if(temp && temp.length){
matches = temp;
}
}
//if safari
if(matches && matches[2].toLowerCase() === 'safari'){
var temp = matches[1];
matches[1] = matches[2];
matches[2] = temp;
}
if(!matches){
matches = [];
}
return {
browser: matches[1] || '',
version: matches[2] || 0
}
})();
console.log(uaMatch.browser);
console.log(uaMatch.version);
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