mdbootstrap4-pro/js/modules/dist/scrolling-navbar.js

MDBootstrap 4 PRO

'use strict';

/* SCROLLING NAVBAR */
var OFFSET_TOP = 50;

$(window).scroll(function () {
  if ($('.navbar').length) {
    if ($('.navbar').offset().top > OFFSET_TOP) {
      $('.scrolling-navbar').addClass("top-nav-collapse");
    } else {
      $('.scrolling-navbar').removeClass("top-nav-collapse");
    }
  }
});