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Dropdown - cant click on the items

I'm trying to fix my dropdown, whenever I hover over my dropdown I can't click on the items because it disappears before I can click on them. I don't know how to fix it. Here is a bit of code I have.
#navContainer {
margin: 0;
padding: 0;
padding-top: 17px;
width: 220px;
}
#navContainer ul {
margin: 0;
padding: 0;
list-style: none;
}
#navContainer ul li {
position: relative;
}
#navContainer ul li span {
display: block;
}
#navContainer ul li a {
text-decoration: underline;
color: orange;
display: block;
padding: 8px;
font-weight: bold;
font-size: large;
}
#navContainer ul ul {
position: absolute;
display: none;
}
#navContainer ul li:hover ul {
width: 80%;
position: absolute;
display: block;
left: 88px;
top: 0;
}
<div id="navContainer">
<ul>
<li><span>Home</span></li>
<li>
<span>About </span>
<ul>
</ul>
</li>
<li>
<span>Quiz's</span>
<ul>
<li>McDonalds</li>
<li>KFC</li>
<li>Burger King</li>
<li>Subway</li>
</ul>
</li>
<li><span>Info</span></li>
</ul>
</div>
This is how my page looks, if i try to move my mouse from McDonalds to KFC my navbar disapears
I tried to make it so the navbar toggles when i click on Quiz's but i couldn't make it work. I hope someone can help me fix it.

Just a couple of issues with your selectors in your CSS. I added background-color so you can see visually how they are connected. Also, the span seemed unnecessary.
#navContainer {
margin: 0;
padding: 0;
padding-top: 17px;
width: 220px;
position: relative;
}
#navContainer ul {
margin: 0;
padding: 0;
list-style: none;
background: lightgrey;
position: relative;
}
ul>li {
position: relative;
}
#navContainer ul li a {
text-decoration: underline;
color: orange;
display: block;
padding: 8px;
font-weight: bold;
font-size: large;
position: relative;
}
#navContainer ul>li>ul {
position: absolute;
display: none;
left: 100%;
width: 100%;
background-color: pink;
top: 0px;
}
#navContainer>ul>li:hover>ul {
display: block;
}
<div id="navContainer">
<ul>
<li>Home</li>
<li>
About
<ul>
</ul>
</li>
<li>
Quiz's
<ul>
<li>McDonalds</li>
<li>KFC</li>
<li>Burger King</li>
<li>Subway</li>
</ul>
</li>
<li>Info</li>
</ul>
</div>

You set the submenu ul to be visible when hovered on parent li item here: #navContainer ul li:hover ul, so as soon as mouse leaves parent li, the submenu ul visibility is set back to none.
Added a border to the li elements to demonstrate.
https://jsfiddle.net/rojqczsp/
You have to work around this. May be try making parent li elements big enough to hold the submenu ul and set the submenu ul position to absolute to keep it within the parent element's dimensions. Or something else. But hope you understand how it works.

Prevent sub-menu from moving down

I created a navbar using CSS and HTML. To that, I have added a sub-menu that opens when hovered over elements of "nav-list". I want the position of the sub-menu to be fixed since I want it to be one place irrespective of which element is hovered. The problem is I used sticky to fix the position of the navbar too. And when I scroll down while the submenu is open, it moves down too. How do I stop this?
<ul class="nav-list" >
<li>
Category
<ul class="sub-menu" id="sub-menu">
<li>shirts </li>
<li>Shorts</li>
</ul>
</li>
<li>
Ultra
<ul class="sub-menu">
<li>shirts </li>
<li>Shorts</li>
<li>Accessories</li>
<li>Shoes</li>
</ul>
</li>
</ul>
</nav>
<script>
window.onscroll = function() {myFunction()};
var navbar = document.getElementById("navbar");
var sticky = navbar.offsetTop;
function myFunction() {
if (window.pageYOffset >= sticky) {
navbar.classList.add("sticky")
} else {
navbar.classList.remove("sticky");
}
}
</script>
/*Code for Sticky*/
.sticky {
position: fixed;
top: 0;
width: 100%;
}
.sticky + .notice{
padding-top: 60px;
}
nav{
display: inline-flex;
width: 100%;
}
.nav-list{
display: flex;
width: 100%;
margin-top: .7rem; /*Use this to change the postition of dropdown*/
padding-left: 1.1rem; /*Use this to move the dropdown left and right*/
}
.nav-list li{
position: relative;
}
.nav-list > li > a{
color: black;
display: block;
font-size: 1rem;
padding: 1.3rem 1rem;
text-transform: uppercase;
transition:0.1s color 300ms;
}
.sub-menu {
display: flex;
position:fixed;
box-sizing: border-box;
background-color: black;
visibility:hidden;
top: 1.5rem; /*push up */
left: -2rem;
width: 82.5rem;
height: 35rem;
}
.sub-menu a{
position: relative;
top: 2rem;
color: white;
font-size: 1.1rem;
font-weight: 200;
padding: 3rem 40px 0 40px;
}
.sub-menu a:hover{
color: #7e7978;
}
.nav-list li:hover > .sub-menu {
visibility: visible;
opacity: 1;
}

Add/Remove class when clicking on element with pure JavaScript

With a for loop, I removed the active class inside the a tag. However, when I want to add a class when clicking nothing happens and the class gets added to the li and a tag but without the active class name.
This has been asked so many times but I still cannot figure it out. Any help is appreciated. Thank you!
Here is the example: https://jsfiddle.net/fu5e7946/

Basically you are looping within your loop twice. I have fixed that.
You simply need to remove the previous active class and add new one like this:
document.querySelector(".sidenav a.active-list").classList.remove("active-list");
e.target.classList.add('active-list');
You can this: codepen:link https://codepen.io/emmeiWhite/pen/jOMZRxd
let elements = document.querySelectorAll('div, ul, li, a');
elements.forEach(i => {
i.addEventListener('click', function(e) {
document.querySelector(".sidenav a.active-list").classList.remove("active-list");
e.target.classList.add('active-list');
});
});
.sidenav {
width: 130px;
position: fixed;
z-index: 1;
top: 20px;
left: 10px;
overflow-x: hidden;
}
.sidenav ul {
background-color: black;
list-style: none;
padding: 0px;
padding-right: 0px;
}
.sidenav > ul > li {
color: white;
margin: 0px;
}
.sidenav a {
text-decoration: none;
font-size: 18px;
display: block;
line-height: 4em;
color: white;
background-color: black;
}
.sidenav a:hover {
color: grey;
}
.sidenav .active-list {
background-color: #e2c9be;
color: black;
}
<div id="active-buttons" class="sidenav" style="padding-top: 100px;">
<ul class="text-center">
<li>
Profile
</li>
<li>
Experience
</li>
<li>
Projects
</li>
<li>
Skills
</li>
</ul>
</div>

Try with toggle (more info: MDN). There you have working example:
let elements = document.querySelectorAll('div, ul, li, a');
elements.forEach(i => {
i.addEventListener('click', function() {
i.classList.toggle('active-list');
});
});
.sidenav {
width: 130px;
position: fixed;
z-index: 1;
top: 20px;
left: 10px;
overflow-x: hidden;
}
.sidenav ul {
background-color: black;
list-style: none;
padding: 0px;
padding-right: 0px;
}
.sidenav > ul > li {
color: white;
margin: 0px;
}
.sidenav a {
text-decoration: none;
font-size: 18px;
display: block;
line-height: 4em;
color: white;
background-color: black;
}
.sidenav a:hover {
color: grey;
}
div ul li a.active-list {
background-color: #e2c9be;
color: black;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="active-buttons" class="sidenav" style="padding-top: 100px;">
<ul class="text-center">
<li>
Profile
</li>
<li>
Experience
</li>
<li>
Projects
</li>
<li>
Skills
</li>
</ul>
</div>

Why is my list not stacking on top of each other?

I have a fixed header menu bar at the top of the webpage. Each of the titles is a link but I want a dropdown for the first link. The link components for the dropdown menu is behaving strangely, see image:
I would like the link components to be stacked on top of each other, like a proper dropdown. Below is my code:
It looks correct when I run the code snippet but when I did these codings in Visual Studio, the codings below looks just like the image.
// When the user scrolls the page, execute myFunction
window.onscroll = function () { myFunction() };
// Get the navbar
var navbar = document.getElementById("navbar");
// Get the offset position of the navbar
var sticky = navbar.offsetTop;
// Add the sticky class to the navbar when you reach its scroll position. Remove "sticky" when you leave the scroll position
function myFunction() {
if (window.pageYOffset >= sticky) {
navbar.classList.add("sticky")
} else {
navbar.classList.remove("sticky");
}
}
.navbar {
overflow: hidden;
background-color: #333;
position: fixed;
top: 0;
width: 100%;
opacity: 1;
}
.navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background: #ddd;
color: black;
}
/* The dropdown container */
.dropdown {
float: left;
overflow: hidden;
}
/* List for header */
.navlist {
list-style-type: none;
margin: 0;
padding: 0;
background-color: black;
}
.navlist li {
float: left;
}
.navlist a{
display:block;
padding:8px;
transition:0.3s;
}
.navlist a:hover{
background-color:rgba(255,255,255,0.3);
}
.navlist a[href="#Quiclinks"] {
background-color: #fff;
color: #000;
}
.navlist>li{
position:relative;
}
<div id="navbar">
<div class="dropdown">
<ul class="navlist">
<li>
Quicklinks<i class="fa fa-angle-double-down"></i>
<div>
All Documents
Divisional Websites
About
</div>
</li>
<li>Intro & News </li>
<li>Programmes</li>
<li>Benefits</li>
<li>Location</li>
</ul>
</div>
</div>

<div id="navbar">
<div class="dropdown">
<ul class="navlist">
<li>
<div className="linkWrapper">
Quicklinks<i class="fa fa-angle-double-down"></i>
</div>
<div>
All Documents
Divisional Websites
About
</div>
</li>
<li>Intro & News </li>
<li>Programmes</li>
<li>Benefits</li>
<li>Location</li>
</ul>
</div>
</div>
// When the user scrolls the page, execute myFunction
window.onscroll = function () { myFunction() };
// Get the navbar
var navbar = document.getElementById("navbar");
// Get the offset position of the navbar
var sticky = navbar.offsetTop;
// Add the sticky class to the navbar when you reach its scroll position. Remove "sticky" when you leave the scroll position
function myFunction() {
if (window.pageYOffset >= sticky) {
navbar.classList.add("sticky")
} else {
navbar.classList.remove("sticky");
}
}
.navbar {
overflow: hidden;
background-color: #333;
position: fixed;
top: 0;
width: 100%;
opacity: 1;
}
.navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background: #ddd;
color: black;
}
/* The dropdown container */
.dropdown {
float: left;
overflow: hidden;
}
/* List for header */
.navlist {
list-style-type: none;
margin: 0;
padding: 0;
background-color: black;
}
.navlist li {
float: left;
}
.navlist a{
display:block;
padding:8px;
transition:0.3s;
}
.linkWrapper a:first-child {
display:block;
}
.navlist a:hover{
background-color:rgba(255,255,255,0.3);
}
.navlist a[href="#Quiclinks"] {
background-color: #fff;
color: #000;
}
.navlist>li{
position:relative;
}

remove the float for the submenu items adding
.navlist li div a {
float: none;
}
// When the user scrolls the page, execute myFunction
window.onscroll = function () { myFunction() };
// Get the navbar
var navbar = document.getElementById("navbar");
// Get the offset position of the navbar
var sticky = navbar.offsetTop;
// Add the sticky class to the navbar when you reach its scroll position. Remove "sticky" when you leave the scroll position
function myFunction() {
if (window.pageYOffset >= sticky) {
navbar.classList.add("sticky")
} else {
navbar.classList.remove("sticky");
}
}
.navbar {
overflow: hidden;
background-color: #333;
position: fixed;
top: 0;
width: 100%;
opacity: 1;
}
.navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background: #ddd;
color: black;
}
/* The dropdown container */
.dropdown {
float: left;
overflow: hidden;
}
/* List for header */
.navlist {
list-style-type: none;
margin: 0;
padding: 0;
background-color: black;
}
.navlist li {
float: left;
}
.navlist li div a {
float: none;
}
.navlist a{
display:block;
padding:8px;
transition:0.3s;
}
.navlist a:hover{
background-color:rgba(255,255,255,0.3);
}
.navlist a[href="#Quiclinks"] {
background-color: #fff;
color: #000;
}
.navlist>li{
position:relative;
}
<div id="navbar">
<div class="dropdown">
<ul class="navlist">
<li>
Quicklinks<i class="fa fa-angle-double-down"></i>
<div>
All Documents
Divisional Websites
About
</div>
</li>
<li>Intro & News </li>
<li>Programmes</li>
<li>Benefits</li>
<li>Location</li>
</ul>
</div>
</div>

UPDATE
Your code snippet already set links to display: block and it works as expected, your issue seems to come from somewhere else, maybe css overrides elsewhere in your project ?
.navlist a{
display:block;
padding:8px;
transition:0.3s;
}
ORIGINAL ANSWER
You're using a tags which by default are displayed inline, you could add some styling to your a to display: block or use a list :
Quicklinks<i class="fa fa-angle-double-down"></i>
<ul>
<li>All Documents</li>
<li>Divisional Websites</li>
<li>About</li>
</ul>
You may want to make this list unstyled to avoid dots.
Also to behave like a proper dropdown, this list should be hidden on first render and you will trigger the visibility with another js function listening on click event on your "Quicklinks" link. Something like :
var button = document.getElementById("dropdownButton");
var menu = document.getElementById("dropdownMenu");
button.addEventListener("click", function(e) {
menu.classList.toggle("hidden");
});
.hidden {
display: none;
}
Quicklinks
<ul id="dropdownMenu" class="hidden">
<li>All Documents</li>
<li>Divisional Websites</li>
<li>About</li>
</ul>

this is because your css have :
.navlist li {
float: left;
}
just remove it and add to .navlist a
clear: both;
}
complete code :
.navbar {
overflow: hidden;
background-color: #333;
position: fixed;
top: 0;
width: 100%;
opacity: 1;
}
.navbar a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background: #ddd;
color: black;
}
/* The dropdown container */
.dropdown {
float: left;
overflow: hidden;
}
/* List for header */
.navlist {
list-style-type: none;
margin: 0;
padding: 0;
background-color: black;
}
/* just example */
.navlist div {
margin-left: 1em;
}
.navlist a{
display:block;
padding:8px;
transition:0.3s;
/* adding : ( work with -- float: left -- allready present in -- .navbar a -- */
clear: both;
}
.navlist a:hover{
background-color:rgba(255,255,255,0.3);
}
.navlist a[href="#Quiclinks"] {
background-color: #fff;
color: #000;
}
.navlist>li{
position:relative;
}
<link rel="stylesheet"
href="https://use.fontawesome.com/releases/v5.8.1/css/all.css"
integrity="sha384-50oBUHEmvpQ+1lW4y57PTFmhCaXp0ML5d60M1M7uH2+nqUivzIebhndOJK28anvf"
crossorigin="anonymous">
<div id="navbar">
<div class="dropdown">
<ul class="navlist">
<li>
Quicklinks <i class="fa fa-angle-double-down"></i>
<div>
All Documents
Divisional Websites
About
</div>
</li>
<li>Intro & News </li>
<li>Programmes</li>
<li>Benefits</li>
<li>Location</li>
</ul>
</div>
</div>

JQuery category filter breaks when a category is more than 2 words

I am using Jquery to show project categories and filter the projects by which category is selected.
View the code pen here: https://codepen.io/saintasia/pen/dzqZov
HTML:
<body>
<div class="container">
<nav>
<ul>
<li class="current">All projects</li>
<li>Front-end</li>
<li>Back-end</li>
<li>Apps</li>
<li>Design</li>
<li>Testing Testing Testing</li>
</ul>
</nav>
<div id="projects">
<h1 class="heading">All Projects</h1>
<ul id="gallery">
<li class="design"><img src="https://source.unsplash.com/jjtdL443L4w/700x700"></li>
<li class="apps"><img src="https://source.unsplash.com/y1yQQmozTBw/700x700"></li>
<li class="back-end"><img src="https://source.unsplash.com/b18TRXc8UPQ/700x700"></li>
<li class="apps design"><img src="https://source.unsplash.com/klRB1BB9pV8/700x700"></li>
<li class="front-end testing-testing-testing back-end"><img src="https://source.unsplash.com/y1yQQmozTBw/700x700"></li>
<li class="front-end design"><img src="https://source.unsplash.com/1vwwZ-BmmrE/700x700"></li>
<li class="apps"><img src="https://source.unsplash.com/WLOCr03nGr0/700x700"></li>
<li class="back-end"><img src="https://source.unsplash.com/iOykDIkZLQw/700x700"></li>
</ul>
</nav>
</div>
<!-- modal gallery -->
<div class="gallery">
<a class="close" href="#">
<i>
<span class="bar"></span>
<span class="bar"></span>
</i>
</a>
<img src="">
</div>
</div>
</body>
CSS:
* {
margin: 0;
padding: 0;
}
body {
color: #333;
font-size: 13px;
background: #f4f4f4;
font-family: sans-serif;
overflow:auto;
}
.container {
width: 90%;
max-width: 960px;
margin: 30px auto;
position: relative;
text-align: center;
}
h1 {
margin-bottom: 20px;
text-transform: uppercase;
color: #F39CC3;
}
nav {
display: block;
width: 100%;
}
ul {
list-style: none;
margin-bottom: 20px;
}
nav > ul > li {
display: inline-block;
}
nav > ul > li > a {
text-transform: uppercase;
padding: 4px 10px;
margin-right: 2px;
margin-left: 2px;
text-decoration: none;
color: #27A4DD;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 25px;
border: 1px solid #27A4DD;
-webkit-transition: all 300ms ease-in-out;
-moz-transition: all 300ms ease-in-out;
transition: all 300ms ease-in-out;
}
.hidden {
display: none;
}
nav > ul > li > a:hover, .current a {
color: #fff;
background-color: #27A4DD;
}
#projects > ul > li {
display: inline-block;
float: left;
margin-right: 10px;
margin-bottom: 5px;
width: 23%;
height: auto;
cursor: pointer;
border-radius: 5px;
/* Padding stays within the width */
box-sizing: border-box;
position: relative;
opacity: 0.7;
-webkit-transition: all 300ms ease-in-out;
-moz-transition: all 300ms ease-in-out;
transition: all 300ms ease-in-out;
}
#projects > ul > li:hover {
opacity: 1;
}
img {
max-width: 100%;
border-radius: 5px;
}
.gallery {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: rgba(0,0,0,0.8);
padding: 40px 10px;
display: none;
box-sizing: border-box;
}
.gallery > img {
max-height: 100%;
width: auto;
}
.close i {
position: fixed;
top: 10px;
right: 10px;
height: 30px;
width: 30px;
}
.bar {
display: block;
position: absolute;
top: 13px;
float: left;
width: 30px;
border-bottom: 4px solid #fff;
transform: rotate(45deg);
}
.bar:first-child {
transform: rotate(-45deg);
}
#media (max-width: 768px){
#projects > ul > li {
width: 48%;
}
}
#media (max-width: 568px) {
#projects > ul > li {
width: 100%;
}
}
JS:
$(document).ready(function(){
// filter
$('nav a').on('click', function(event){
event.preventDefault();
// current class
$('nav li.current').removeClass('current');
$(this).parent().addClass('current');
// set new heading
$('h1.heading').text($(this).text());
// filter link text
var category = $(this).text().toLowerCase().replace(' ', '-');
// remove hidden class if "all" is selected
if(category == 'all-projects'){
$('ul#gallery li:hidden').fadeIn('slow').removeClass('hidden');
} else {
$('ul#gallery li').each(function(){
if(!$(this).hasClass(category)){
$(this).hide().addClass('hidden');
} else {
$(this).fadeIn('slow').removeClass('hidden');
}
});
}
return false;
});
// lightbox
$('ul#gallery a').on('click', function(event){
event.preventDefault();
var link = $(this).find('img').attr('src');
$('.gallery img').attr('src', '');
$('.gallery img').attr('src', link);
$('.gallery').fadeIn('slow');
});
// close lightbox
$('.gallery').on('click', function(event){
event.preventDefault();
$('.gallery').fadeOut('slow');
});
});
The problem I am having is that if a category is more than 2 words, it doesn't show the projects with that category. You'll see in the code pen that there is a category called "Testing Testing Testing" and one of the projects has that category assigned to it. But, when you click the Testing Testing Testing category, no projects show up. All of the other categories work however, because they are all only 2 words long.
Any help is greatly appreciated!

Your code break because the .replace(' ', '-') code just replace the first space
if you want to change all space with '-', you should change this code
var category = $(this).text().toLowerCase().replace(' ', '-');
to this
var category = $(this).text().toLowerCase().split(' ').join('-');