Scroll Fade JS

$(window).load(function() {
  var $fadedElems = $('body').find('.faded');
  $fadedElems.removeClass('faded');
});
$(function() {
    var $container = $('.img-container'),
    $childElement = $('.img-container img'),
    imgArray = [],
    currentImg = 0;

    $(window).load(function() {
        $childElement.each(function() {
            var leftOffset = parseInt($(this).offset().left);
            console.log(leftOffset);
            imgArray.push(leftOffset);
        });
        
        $(document).keydown(function(e) {

            if ((e.keyCode || e.which) == 37) { // left arrow
                if (currentImg === 0 ) {
                    //on first slide, can't go left
                    $container.animate({scrollLeft: '0px'});
                    return;
                } else {
                    e.preventDefault;
                    currentImg--;
                    scrollFunction();
                }
            }
            if ((e.keyCode || e.which) == 39) { // right arrow
                if (currentImg === (imgArray.length -1)) {
                    //on last slide, can't go right
                    e.preventDefault;
                    return;
                } else {
                    //not on last slide
                    console.log('right!' + (imgArray[currentImg]) );
                    e.preventDefault;
                    currentImg++;
                    scrollFunction();

                }
            }
        });

        var scrollFunction = function() {
            $container.stop().animate({scrollLeft: (imgArray[currentImg]) + 'px'});
        };

    });

});