Check whether channel is online or not via js [SOLUTION FOUND]

API
2

here give this a try:

$.getJSON('https://api.twitch.tv/kraken/streams/' + YOUR_CHANNEL_NAME, function(channel) {

    if (channel["stream"] == null) { 
        //THEY ARE OFFLINE DO WHATEVER HERE

    } else {

        //THEY ARE ONLINE DO WHATEVER HERE
    
    }



});