Detect Element Height Change (eg. Window)

onElementHeightChange.js

// Source: http://stackoverflow.com/questions/14866775/detect-document-height-change

var $j = jQuery.noConflict();
$j( document ).ready(function($) {
    function onElementHeightChange(elm, callback){
        var lastHeight = elm.clientHeight, newHeight;
        (function run(){
            newHeight = elm.clientHeight;
            if( lastHeight != newHeight )
                callback();
            lastHeight = newHeight;

            if( elm.onElementHeightChangeTimer )
                clearTimeout(elm.onElementHeightChangeTimer);

            elm.onElementHeightChangeTimer = setTimeout(run, 200);
        })();
    }

    onElementHeightChange(document.body, function(){
        console.log("height changed");
    });

});