| Unknown | d2db0f1 | 2019-01-10 14:22:00 -0500 | [diff] [blame] | 1 | /** |
| 2 | * navbar-ontop.js 1.0.0 |
| 3 | * Add .navbar-ontop class to navbar when the page is scrolled to top |
| 4 | * Make sure to add this script to the <head> of page to avoid flickering on load |
| 5 | */ |
| 6 | |
| 7 | (function() { |
| 8 | |
| 9 | var className = "navbar-ontop" |
| 10 | |
| 11 | // we start hidden, to avoid flickering |
| 12 | document.write("<style id='temp-navbar-ontop'>.navbar {opacity:0; transition: none !important}</style>") |
| 13 | |
| 14 | function update() { |
| 15 | // toggle className based on the scrollTop property of document |
| 16 | var nav = document.querySelector(".navbar") |
| 17 | |
| 18 | if (window.scrollY > 15) |
| 19 | nav.classList.remove(className) |
| 20 | else |
| 21 | nav.classList.add(className) |
| 22 | } |
| 23 | |
| 24 | document.addEventListener("DOMContentLoaded", function(event) { |
| 25 | $(window).on('show.bs.collapse', function (e) { |
| 26 | $(e.target).closest("." + className).removeClass(className); |
| 27 | }) |
| 28 | |
| 29 | $(window).on('hidden.bs.collapse', function (e) { |
| 30 | update() |
| 31 | }) |
| 32 | update() |
| 33 | // still hacking to avoid flickering |
| 34 | setTimeout(function() { |
| 35 | document.querySelector("#temp-navbar-ontop").remove() |
| 36 | }) |
| 37 | }); |
| 38 | |
| 39 | window.addEventListener("scroll", function() { |
| 40 | update() |
| 41 | }) |
| 42 | |
| 43 | })(); |