js获取浏览器版本

   <script>
        function getBrowser() {
            var UserAgent = navigator.userAgent.toLowerCase();
            var browserInfo = {};
            var browserArray = {
                IE: window.ActiveXObject || "ActiveXObject" in window,
                // IE       
                Chrome: UserAgent.indexOf('chrome') > -1 && UserAgent.indexOf('safari') > -1,
                // Chrome浏览器       
                Firefox: UserAgent.indexOf('firefox') > -1,
                // 火狐浏览器       
                Opera: UserAgent.indexOf('opera') > -1,
                // Opera浏览器        
                Safari: UserAgent.indexOf('safari') > -1 && UserAgent.indexOf('chrome') == -1,
                // safari浏览器        
                Edge: UserAgent.indexOf('edge') > -1,
                // Edge浏览器        
                QQBrowser: /qqbrowser/.test(UserAgent),
                // qq浏览器        
                WeixinBrowser: /MicroMessenger/i.test(UserAgent)
                // 微信浏览器  
            };
            // console.log(browserArray)  
            for (var i in browserArray) {
                if (browserArray[i]) {
                    var versions = '';
                    if (i == 'IE') {
                        versions = UserAgent.match(/(msie\s|trident.*rv:)([\w.]+)/)[2];
                    } else if (i == 'Chrome') {
                        for (var mt in navigator.mimeTypes) {
                            //检测是否是360浏览器(测试只有pc端的360才起作用)      
                            if (navigator.mimeTypes[mt]['type'] == 'application/360softmgrplugin') {
                                i = '360';
                            }
                        }
                        versions = UserAgent.match(/chrome\/([\d.]+)/)[1];
                    } else if (i == 'Firefox') {
                        versions = UserAgent.match(/firefox\/([\d.]+)/)[1];
                    } else if (i == 'Opera') {
                        versions = UserAgent.match(/opera\/([\d.]+)/)[1];
                    } else if (i == 'Safari') {
                        versions = UserAgent.match(/version\/([\d.]+)/)[1];
                    } else if (i == 'Edge') {
                        versions = UserAgent.match(/edge\/([\d.]+)/)[1];
                    } else if (i == 'QQBrowser') {
                        versions = UserAgent.match(/qqbrowser\/([\d.]+)/)[1];
                    }
                    browserInfo.type = i; browserInfo.versions = parseInt(versions);
                }
            } return browserInfo;
        }
    </script>