CODE EXAMPLE FOR JAVASCRIPT

js redirection captive portal

function parseUA() {
            var u = navigator.userAgent;
            var u2 = navigator.userAgent.toLowerCase();
            return { 
                trident: u.indexOf('Trident') > -1, 
                presto: u.indexOf('Presto') > -1, 
                webKit: u.indexOf('AppleWebKit') > -1, 
                gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, 
                mobile: !!u.match(/AppleWebKit.*Mobile.*/), 
                ios: !!u.match(/(i[^;]+;( U;)? CPU.+Mac OS X/), 
                android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, 
                iPhone: u.indexOf('iPhone') > -1, 
                iPad: u.indexOf('iPad') > -1, 
                webApp: u.indexOf('Safari') == -1, 
                iosv: u.substr(u.indexOf('iPhone OS') + 9, 3),
                weixin: u2.match(/MicroMessenger/i) == "micromessenger",
                ali: u.indexOf('AliApp') > -1,
            };
        }
        var ua = parseUA();

        if (ua.mobile) {
            location.href = './pc.html';
        }