Check when an interface passes a media query threshold.

mediaSizeCheck.js

var checker = 0;

$(window).resize(function(){
    if(window.matchMedia){
        var mq = window.matchMedia( "(min-width: 940px)" );
        var aMatch = mq.matches;

        if(checker == 0){
            if(aMatch) {
                return;
            }
            else{
                
                // it is mobile

                checker = 1;
            }
        }
        else{
            if(aMatch) {
                // it is desktop
               
                checker = 0;
            }
            else{
                return;
            }
        }
    }
});