var onCssLoad = function (options, callback) {
    var body = $("body");
    var div = document.createElement(constants.TAG_DIV);
    for (var key in options) {
        if (options.hasOwnProperty(key)) {
            if (key.toLowerCase() === "css") {
                continue;
            }
            div[key] = options[key];
        }
    }

    var css = options.css;
    if (css) {
        body.appendChild(div);
        var handle = -1;
        handle = window.setInterval(function () {
            var match = true;
            for (var key in css) {
                if (css.hasOwnProperty(key)) {
                    match = match && utils.getStyle(div, key) === css[key];
                }
            }

            if (match === true) {
                window.clearTimeout(handle);
                body.removeChild(div);
                callback();
            }
        }, 100);
    }
}

onCssLoad({
    "id": <insert element CSS applies to>,
     css: <insert sample CSS styles>
}, function () {
    console.log("CSS loaded, you can show the slideshow now :)");
});

function getStyle(elem, prop) {
    return window.getComputedStyle(elem, null).getPropertyValue(prop);
}

function checkStyle(elem, prop, callback) {
    while ( getStyle(elem, prop) !== 'computed' ) {
        // see explanation below
    }
    callback()
}

function checkStyle(elem, prop, callback) {
    if ( getStyle(elem, prop) !== 'computed' ) {
        // see explanation below
        window.setTimeout( function() {checkStyle(elem, prop, callback);}, 100 )
    } else {
        callback()
    }
}

$(function(){
 // this fn not waiting for images
  $('.selector-class')[0].style ;// this is your computed style OR...
  $('.selector-class').css(); // json representation of style;
});

document.addEventListener( "DOMContentLoaded", function(){
  var computedStyle = document.querySelector('#yourElementId').style ;
})

function getStyle(elem, prop) {
    return window.getComputedStyle(elem, null).getPropertyValue(prop);
}

function checkStyle(elem, prop, callback) {
    while ( getStyle(elem, prop) !== 'computed' ) {
        // see explanation below
    }
    callback()
}