Checking Standard Window Sizes

checkWindowSize

$( document ).ready(function(){
     var w = checkWindowSize();
     $("body").removeClass("tiny small medium large xlarge huge");
     if(w.size){ $("body").addClass(w.size) };    
 });

$( window ).resize(function() {
    var w = checkWindowSize();
    $("body").removeClass("tiny small medium large xlarge huge");
    if(w.size){ $("body").addClass(w.size) };    
});

function checkWindowSize(){
    // Returns .width and .size
    var width = $(window).width();
    var height = $(window).height();
    var o = Object();
    o.width = width;
    o.height = height;
    

    if($(window).width() <= 420){
        // Mobile Sizes
            // iPhone6 Plus: 414
            // iPhone6 : 375
            // iPhone5, iPhone4 : 320
        o.size = "tiny";
    } else {
        if($(window).width() <= 768){
        // Tablet Sizes
            // iPad: 768
            o.size = "small";
        } else {
            if($(window).width() <= 1280){
              o.size = "medium";
            } else {
                 if($(window).width() <= 1600){
                     o.size = "large";
                 } else {
                    if($(window).width() <= 1920){
                     o.size = "xlarge";
                    } else {
                     o.size = "huge";
                    }
                 }
            }
        }
    }
    return o;
};