Add pre-loader before page load

add-preloader.js

/** Add pre-loader before page load **/
jQuery(document).ready(function ($) {
    $(window).load(function () {
        // on window load
        setTimeout(function() {
            //set timeout duration for preloader function
            $(function (){
                $('#preloader').fadeOut('3000', function () {
                    // fade out after 3 seconds
                    $(this).remove();
                    // then remove
                });
            });
            // delay window load/refresh for duration of 1.5seconds
        },"1200");
    });
});