CODE EXAMPLE FOR JAVASCRIPT

waypoint cdn

//waypoint cdn 
 <script src="https://cdnjs.cloudflare.com/ajax/libs/waypoints/4.0.1/jquery.waypoints.min.js"></script>

//DOWN CODE IS STICKY MENU FOR
//(WHEN I NEED SCROLL ONE SECTION AFTER THEN TIGER STICKY MENU)

//js code
$("#service").waypoint(function (direction) {
		if (direction == 'down') {
			$('nav').addClass('sticky');
		} else {
			$('nav').removeClass('sticky');
		}
	});

// css code
.sticky {
	position: fixed;
	top: 0;
	left: 0;
	background: #834a8f;
	width: 100%;
	z-index: 1;
}

//CUSTOM CODE JS (WITHOUT PLUGIN)
//STICKY MENU JS CODE
$(window).scroll(function () {
		if ($(this).scrollTop() > 650) {
			$('nav').addClass('sticky');
		} else {
			$('nav').removeClass('sticky');
		}
	});