Documentation deprecated?

Hi!
I have a problem with the documentation in order to create a custom callback on the event of changing the slide.
Firstly, it says that I should use _N2 which is I think deprecated and replaced with N2R.

	jQuery(document).ready(()=>{

		// moving slider
		N2R('#n2-ss-2', function($, slider){

			slider.sliderElement[0].addEventListener('mainAnimationStart',
			function(e) {
				alert(e);
		
				console.log('Your slider starts to switch to another slide.');
			});
			slider.sliderElement[0].addEventListener('mainAnimationComplete',
			function(e) {
				console.log('Your slider finished moving to the other slide.');
			});
		});
		// moving slider

This is the code for my slider. I managed to change the one from docs to the point of no thrown errors, but it doesn’t do anything.
Can I please get help with that?

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