Manually Show/Hide Preloader using JavaScript

To show preloader you need to make some custom animation. This one:

function openPreloader () {
   Godlike.openPreloader();
   var $content = jQuery('.nk-preloader').find('.nk-preloader-content, .nk-preloader-skip');
   TweenMax.to($content, 0.3, {
       y: '0px',
       opacity: 1,
       display: 'block',
       force3D: true
   });
}
// run
openPreloader();

To hide preloader just run default Godlike function:

// run
Godlike.closePreloader();