Javascript 读取浏览器名及版本号

Javascript 读取浏览器名及版本号

navigator.sayswho= (function(){
var ua= navigator.userAgent, tem,
M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
if(/trident/i.test(M[1])){
tem=  /\brv[ :]+(\d+)/g.exec(ua) || [];
return 'IE '+(tem[1] || '');
}
if(M[1]=== 'Chrome'){
tem= ua.match(/\b(OPR|Edge)\/(\d+)/);
if(tem!= null) return tem.slice(1).join(' ').replace('OPR', 'Opera');
}
M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?'];
if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]);
return M.join(' ');
})();

"Safari 9"