Header navbar error - javascript

I'm coding a responsive navbar, which turns into a burger menu below a certain width, however when I try to open the dropdown menu, it all jumps back up to the top of the page rather than remaining wherever I am within the page.
Sorry it's quite hard to describe, but do find all the code below and please let me know if you're able to see what the issue is.
Thank you all in advance:
$('#burger_menu').click(function() {
$('header ul').css('display', 'block');
$('header ul').mouseleave(function() {
$('header ul').css('display', 'none');
});
});
header {
width: 100%;
background: #62c2d2;
position: fixed;
top: 0;
z-index: 20;
}
header #logo {
width: 300px;
height: 40px;
margin: 15px;
background: url('../img/new-logo.png')center no-repeat;
background-size: cover;
float: left;
}
header nav {
padding: 10px 15px;
float: right;
}
header nav #burger_menu {
padding-right: 20px;
font-size: 40px;
display: none;
color: #fff;
}
header nav #burger_menu:visited {
color: #fff;
}
header nav #burger_menu:hover {
color: #eee;
}
header nav #burger_menu:active {
color: #fff;
}
header nav ul {
display: block;
}
header nav li {
padding: 10px;
display: inline-block;
float: left;
}
header nav a {
width: fit-content;
font-size: 18px;
color: #fff;
text-decoration: none;
position: relative;
}
#media screen and (max-width: 1023px) {
/* NAV */
header nav #burger_menu {
display: inline-block;
}
header nav ul,
nav:active ul {
display: none;
position: absolute;
padding: 20px 40px;
background: #62c2d2;
right: 0;
top: 80px;
width: 30%;
}
header nav li {
width: 100%;
text-align: center;
padding: 15px;
margin: 0;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<header class="clearfix">
<!-- left -->
<!-- right -->
<nav>
<i class="fa fa-bars"></i>
<ul>
<li>
<span class="active">home</span>
</li>
<li>
<span>about</span>
</li>
<li>
<span>careers</span>
</li>
<li>
<span>contact</span>
</li>
</ul>
</nav>
</header>

Related

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;
}

Fixed to Top Navbar

This is the code for my navbar (it has some more details, but it's just style so it doesn't matter I guess), and I cant find anything to make it fixed to the top of the page when I scroll down.
Also I'd like to do a smooth movement whenever I click any of the buttons, but
.container {
width: 80%;
margin: 0 auto;
}
header {
background: black;
}
header::after {
content: '';
display: table;
clear: both;
}
header h3 {
color: white;
float: left;
padding: 10px 0;
}
nav {
float: right;
}
nav ul {
margin: 0;
padding: 0;
list-style: none;
}
nav li {
display: inline-block;
margin-left: 70px;
padding-top: 18px;
position: relative;
}
<header>
<div class="container">
<h3>logo</h3>
<nav>
<ul>
<li>Home</li>
<li>Sobre</li>
<li>Serviços</li>
<li>Base de Custo</li>
<li>FAQ</li>
<li>Contato</li>
</ul>
</nav>
</div>
</header>

To do this, you want to give it the property:
header {
position: fixed;
}

Breakpoint leaves blank space in content

At my breakpoint of 1100px I have told CSS to remove a div which holds an image. However, the rest of the content does not move across and there is a large blank area (as if the div is still there). All I would like to happen is for the content to all shift over and fill the page. This error on occurs on this singular page and this specific to this very break point.
/*minimised browser winddow */
#media(max-width: 1100px) {
header #branding,
header nav,
header nav li,
#newsletter form,
aside#sidebar {
float: none;
text-align: center;
width: 100%;
}
aside {
display: none;
}
#newsletter h1 {
display: none;
}
}
/* 768 tablet */
#media(max-width: 768px) {
header #branding,
header nav,
header nav li,
#newsletter h1,
#newsletter form,
#boxes .box,
article#main-col,
aside#sidebar {
float: none;
width: 100%;
}
header {
padding-bottom: 20px;
}
#imagery {
display: none;
}
#showcase h1 {
font-size: 275%;
}
#showcase p {
font-size: 100%;
}
#newsletter button,
.quote button {
display: block;
width: 100%;
}
#newsletter form input[type="email"],
.quote input,
.quote textarea {
width: 100%;
margin-bottom: 5px;
}
.col-25,
.col-75 {
width: 100%;
margin-top: 0;
}
/* nav */
ul.topnav li {
display: none;
}
ul.topnav li.icon {
display: inline-block;
}
ul.topnav.responsive {
position: relative;
}
ul.topnav.responsive li.icon {
position: absolute;
right: 0;
top: 0;
}
ul.topnav.responsive li {
float: none;
/* 'un' float the list items so they return to displaying vertically */
display: inline;
}
ul.topnav.responsive li a {
display: block;
text-align: left;
}
}
/* 400 pixels mobile phone */
#media screen and (max-width: 480px) {
header #branding,
header nav,
header nav li {
text-align: center;
font-size: 100%
}
header ul {
padding: 10px;
font-size: 100%;
}
<script src="https://use.fontawesome.com/3a2264e344.js"></script>
<script src="html9shiv.js"></script>
<link rel="shortcut icon" type="image/png" href="wrench.png" />
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
<meta name="desciption" content="Darran Brady Plumbing">
<meta name="keywords" content="Plumbing, Boilers, Showers, Central Heating, Kitchens, Bathrooms, Installations, Landlord Services, Horsham, West Sussex, Sussex,Barns Green, Billingshurst,Broadbridge Heath,Christ's Hospital, Clemsfold, Copsale,Colgate,Cowfold, Faygate, Handcross, Horsham, Itchingfield, Kingsfold,Lambs Farm,Lower Beeding,Mannings Heath, Maplehurst, Monks Gate, Nuthurst, Partridge Green, Pease Pottage, Roffey, Rowhook, Rusper, Rudgwick, Southwater, Slinfold, Warnham ">
<meta name="author" content="DB, Darran, Brady, Darran Brady">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script>
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}
</script>
</head>
<body>
<header>
<div class="container">
<div id="branding">
<h1><span class="highlight">DB</span> Plumbing</h1>
</div>
<nav>
<ul class="topnav" id="myTopnav">
<li class="active">Home</li>
<li>About</li>
<li>Services</li>
<li>Coverage</li>
<li>Contact</li>
<li class="icon">
☰
</li>
</ul>
</nav>
</div>
</header>
<div class="container">
<div class="dark">
<div class="callus"><i class="fa fa-phone fa-2x" ></i></div>
<h2>Our Story</h2>
</div>
</div>
<section id="main">
<div class="container">
<article id="main-col">
<p>
Our customer's individual requirements are important to us at DB Plumbing. We always provide quality service and products and combined with honesty has made us the first choice of many homes in the Horsham area.</p>
<div class="dark">
<h3>What We Offer</h3>
<ul>
<li>Plumbing and Heating Services</li>
<li>Gas Safe Registered: 202542</li>
<li>VAT Registered</li>
<li>25 years of expertise</li>
<li>Plumbing and Heating Services</li>
<li>Heating Engineer Qualified</li>
<li>VAT Registered</li>
<li>100% Satisfaction Garauntee</li>
</ul>
</article>
<aside id="sidebar">
<div class="dark">
<h3>Satisfaction Garauntee</h3>
<p>Reputation matters. 98% of our customer would reccomend us to a friend.</p>
<img class="catsmall" src="cat.png" alt="checkatradelogo">
</div>
</aside>
</div>
</section>
<footer>
<div>
<p>Darren Brady Plumbing Copyright © 2017</p>
<p>Registered in England No. 4364232</p>
</div>
</footer>

I think that setting your container class with a width:100% in your #media css will fix your problem.

It's possible in 2 ways to center the div(in your case "What we offer" block)
Center block by position:relative
#main-col{
position:relative;
left:15%; //This can differ, and you can keep whatever you see it's best
}
Increase the min-width of that particular block
#main-col{
min-width: 100%; //Remember, you need to force the width,
//so width:100% won't work here. Hence min-width
}
body {
font: 100%/1.5 Arial, Helvetica, sans-serif;
padding: 0;
margin: 0;
background-color: white;
}
/* Style the list 'container' */
ul.topnav {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
}
/* Float the list items left - this is the 'magic' that turns a vertical list into a horizontal row */
ul.topnav li {
float: left;
}
/* style the links */
ul.topnav li a {
display: inline-block;
color: white;
text-align: center;
text-decoration: none;
transition: 0.3s;
font-size: 100%;
}
/* hover */
ul.topnav li a:hover {
color: gold;
}
/* Hide the icon initially */
ul.topnav li.icon {
display: none;
}
/* Global */
.container {
width: 70%;
margin: auto;
overflow: hidden;
/* Allows the burger nav and branding to sit on the same line */
}
a {
text-decoration: none;
text-shadow: 50px;
color: black;
}
ul {
margin: 0;
padding: 0;
}
.subscribe {
height: 38px;
background: gold;
border: 0;
padding-left: 20px;
padding-right: 20px;
color: black;
}
.dark {
padding: 25px;
background: #35424a;
color: white;
margin-top: 10px;
margin-bottom: 10px;
}
.maps {
position: relative;
padding-bottom: 75%; // This is the aspect ratio
height: 0;
overflow: hidden;
}
.maps iframe {
position: absolute;
top: 0;
left: 0;
width: 100% !important;
height: 100% !important;
}
/* Header **/
header {
background: #35424a;
color: white;
padding-top: 30px;
min-height: 70px;
border-bottom: gold 5px solid;
}
header a {
color: #ffffff;
text-decoration: none;
text-transform: uppercase;
font-size: 100%;
}
header li {
float: left;
display: inline;
padding: 0 20px 0 20px;
}
header #branding {
float: left;
}
header #branding h1 {
margin: 0;
}
header nav {
float: right;
margin-top: 10px;
}
header .highlight {
color: gold;
}
header a:hover {
color: gold;
}
h3 .bronze {
color: #cc6633;
}
h3 .silver {
color: silver;
}
h3 .gold {
color: gold;
}
img.catsmall {
width: 90%;
height: auto;
}
/* Showcase */
#showcase {
min-height: 350px;
}
#showcase h1 {
margin-top: 50px;
font-size: 500%;
margin-bottom: 10px;
text-align: center;
}
#showcase h2 {
margin-bottom: 10px;
text-align: center;
}
#showcase p {
font-size: 120%;
}
/* Newsletter */
#newsletter {
padding: 15px;
color: #ffffff;
background: #35424a
}
#newsletter h1 {
float: left;
}
#newsletter form {
float: right;
margin-top: 15px;
}
#newsletter input[type="email"] {
padding: 4px;
height: 26px;
width: 250px;
}
/* Sidebar */
aside#sidebar {
float: right;
width: 25%;
margin-top: 10px;
}
section#contactus .quote input,
section#contactus .quote textarea {
width: 30%;
padding: 5px;
}
/* Main-col */
article#main-col {
float: left;
width: 70%;
}
/* Imagery */
#imagery {
margin-top: 2%;
margin-bottom: 2%;
}
#imagery .box {
float: right;
text-align: center;
width: 30%;
padding: 10px;
}
#imagery .box i {
font-size: 800%;
}
/* Create four equal columns that floats next to each other */
.column {
float: left;
width: 20%;
padding: 10px;
}
.column img {
margin-top: 12px;
width: 100%;
}
/* Clear floats after the columns */
.row:after {
content: "";
display: table;
clear: both;
}
.container .visuals {
float: right;
}
.container .callus {
float: right
}
.fa-phone {
color: gold;
}
/* Services */
input[type=text],
select,
textarea {
width: 60%;
padding: 12px;
border: 1px box-sizing: border-box;
resize: vertical;
}
/* Floating column for labels: 25% width */
.col-25 {
float: left;
width: 30%;
margin-top: 10px;
}
/* Floating column for inputs: 75% width */
.col-75 {
float: left;
width: 70%;
margin-top: 10px;
}
footer {
padding: 20px;
margin-top: 20px;
color: black;
background-color: gold;
text-align: center;
}
/*minimised browser winddow */
#media(max-width: 1100px) {
header #branding,
header nav,
header nav li,
#newsletter form,
aside#sidebar {
float: none;
text-align: center;
width: 100%;
}
aside {
display: none;
}
#newsletter h1 {
display: none;
}
#main-col {
min-width: 100%;
}
}
/* 768 tablet */
#media(max-width: 768px) {
header #branding,
header nav,
header nav li,
#newsletter h1,
#newsletter form,
#boxes .box,
article#main-col,
aside#sidebar {
float: none;
width: 100%;
}
header {
padding-bottom: 20px;
}
#imagery {
display: none;
}
#showcase h1 {
font-size: 275%;
}
#showcase p {
font-size: 100%;
}
#newsletter button,
.quote button {
display: block;
width: 100%;
}
#newsletter form input[type="email"],
.quote input,
.quote textarea {
width: 100%;
margin-bottom: 5px;
}
.col-25,
.col-75 {
width: 100%;
margin-top: 0;
}
/* nav */
ul.topnav li {
display: none;
}
ul.topnav li.icon {
display: inline-block;
}
ul.topnav.responsive {
position: relative;
}
ul.topnav.responsive li.icon {
position: absolute;
right: 0;
top: 0;
}
ul.topnav.responsive li {
float: none;
/* 'un' float the list items so they return to displaying vertically */
display: inline;
}
ul.topnav.responsive li a {
display: block;
text-align: left;
}
}
/* 400 pixels mobile phone */
#media screen and (max-width: 480px) {
header #branding,
header nav,
header nav li {
text-align: center;
font-size: 100%
}
header ul {
padding: 10px;
font-size: 100%;
}
/* CSS reset */
{
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline;
}
HTML5 display-role reset for older browsers article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
display: block;
}
body {
line-height: 1;
background-image: url("bg.jpg");
background-size: cover;
background-size: contain;
}
ol,
ul {
list-style: none;
}
blockquote,
q {
quotes: none;
}
blockquote:before,
blockquote:after,
q:before,
q:after {
content: '';
content: none;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
<script src="https://use.fontawesome.com/3a2264e344.js"></script>
<script src="html9shiv.js"></script>
<link rel="shortcut icon" type="image/png" href="wrench.png" />
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
<meta name="desciption" content="Darran Brady Plumbing">
<meta name="keywords" content="Plumbing, Boilers, Showers, Central Heating, Kitchens, Bathrooms, Installations, Landlord Services, Horsham, West Sussex, Sussex,Barns Green, Billingshurst,Broadbridge Heath,Christ's Hospital, Clemsfold, Copsale,Colgate,Cowfold, Faygate, Handcross, Horsham, Itchingfield, Kingsfold,Lambs Farm,Lower Beeding,Mannings Heath, Maplehurst, Monks Gate, Nuthurst, Partridge Green, Pease Pottage, Roffey, Rowhook, Rusper, Rudgwick, Southwater, Slinfold, Warnham ">
<meta name="author" content="DB, Darran, Brady, Darran Brady">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script>
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}
</script>
</head>
<body>
<header>
<div class="container">
<div id="branding">
<h1><span class="highlight">DB</span> Plumbing</h1>
</div>
<nav>
<ul class="topnav" id="myTopnav">
<li class="active">Home</li>
<li>About</li>
<li>Services</li>
<li>Coverage</li>
<li>Contact</li>
<li class="icon">
☰
</li>
</ul>
</nav>
</div>
</header>
<div class="container">
<div class="dark">
<div class="callus"><i class="fa fa-phone fa-2x" ></i></div>
<h2>Our Story</h2>
</div>
</div>
<section id="main">
<div class="container">
<article id="main-col">
<p>
Our customer's individual requirements are important to us at DB Plumbing. We always provide quality service and products and combined with honesty has made us the first choice of many homes in the Horsham area.</p>
<div class="dark">
<h3>What We Offer</h3>
<ul>
<li>Plumbing and Heating Services</li>
<li>Gas Safe Registered: 202542</li>
<li>VAT Registered</li>
<li>25 years of expertise</li>
<li>Plumbing and Heating Services</li>
<li>Heating Engineer Qualified</li>
<li>VAT Registered</li>
<li>100% Satisfaction Garauntee</li>
</ul>
</article>
<aside id="sidebar">
<div class="dark">
<h3>Satisfaction Garauntee</h3>
<p>Reputation matters. 98% of our customer would reccomend us to a friend.</p>
<img class="catsmall" src="https://i.pinimg.com/736x/d5/7a/e1/d57ae1e0abaa478e79388007b6d6dd09--woman-face-woman-style.jpg" alt="checkatradelogo">
</div>
</aside>
</div>
</section>
<footer>
<div>
<p>Darren Brady Plumbing Copyright © 2017</p>
<p>Registered in England No. 4364232</p>
</div>
</footer>

Responsive Navigation Not Showing All Items

Hello I am currently learning responsive design and I am trying to make a responsive navigation bar which turns in to a menu when visited on a phone or mobile device! Everything works except not all the navigation items show on the mobile device and I am not sure why! This is the code:
<div class="container">
<div class="navbar">
<ul style="padding-left: 0px;">
<li class="logo"> RONNIE<b>GURR</b></li>
<section class="div_navbar_items">
<li class="navbar_items"> HOME </li>
<li class="navbar_items"> ABOUT US </li>
<li class="navbar_items"> GALLERY </li>
<li class="navbar_items"> SHOP </li>
<li class="navbar_items"> CONTACT </li>
</section>
<li class="icon">
☰
</li>
</ul>
</div>
</div>
<script src="js/responsive.js"></script>
Here is the CSS:
.container {
margin: auto;
width: 90%;
}
.navbar {
position: fixed;
z-index: 100;
overflow: hidden;
margin: auto;
width: 100%;
left:0;
top:0;
}
.navbar li.logo,
.navbar li.navbar_items {
list-style-type: none;
display: inline-block;
}
.navbar li a {
margin-top: 50px;
font-family: 'Cabin', sans-serif;
font-size: 1.3em;
color: white;
font-weight: 700px;
display: inline-block;
text-align: center;
padding: 10px 16px;
text-decoration: none;
}
.navbar li.navbar_items a:hover {
border-bottom-style: solid;
border-bottom-color: white;
/* padding-bottom: 5px; */
}
.navbar li.icon {
display: none;
}
.div_navbar_items {
float: right;
padding-right:1%;
}
/*Start of mobile nav*/
#media screen and (max-width:875px) {
.navbar li.navbar_items {
display: none;
}
.navbar li.icon {
float: right;
display: inline-block;
position: absolute;
right: 0;
top: 19px;
}
}
#media screen and (max-width:875px) {
.navbar.responsive {
position:fixed;
width: 100%;
height: 100vh;
background-color: rgba(236,201,205, 1);
transition: background-color .6s;
}
.navbar.responsive li.logo {
floatL: left;
display: block;
}
.navbar.responsive .div_navbar_items {
float: none;
padding-right:0;
}
.navbar.responsive li.navbar_items {
display: block;
padding: 50px;
font-size: 25px;
}
.navbar.responsive li.navbar_items a {
display: block;
text-align: center;
}
.navbar.responsive li.navbar_items a:hover{
color:#17171e;
border-bottom-color: transparent;
}
}
/*End of mobile nav*/
And here is the JS:
function navBarFunction() {
document.getElementsByClassName("navbar")[0].classList.toggle("responsive");
}
codepen: https://codepen.io/anon/pen/JyEoWY

I think this will get you in the right direction, then you can decide upon what you'd like to do from here. You are setting your navbar to be 100vh, which is 100% height of the screen, so you need to make sure your padding and margin on your nav elements aren't so much. Try removing any margin and padding from these two styles, then adapt it on your own from here. If you don't want to change this stuff, refer to the second part of my answer, and just make the nav scrollable.
.navbar li a {
margin-top: 0px;
}
#media screen and (max-width: 875px) {
.navbar.responsive li.navbar_items {
display: block;
padding: 0px;
font-size: 25px;
}
}
Also, if you look in .navbar styling (line 8 of your codepen) you have it set to overflow: hidden. You can update your .navbar.responsive class with overflow of scroll to get it to work.
#media screen and (max-width:875px) {
.navbar.responsive {
position:fixed;
width: 100%;
height: 100vh;
background-color: rgba(236,201,205, 1);
transition: background-color .6s;
overflow: scroll; // Set overflow to scroll
}
}

I guess this happenes because you make .navbar.responsive {
position:fixed;
And you just can't watch all content of block, because it's not allow to scroll. When i change this property to absolute, i looked all items of menu.
By the way, you write CSS property font-weight with px, font-weight: 700px, but it shouldn't be px, it's relative value: font-weight: 700

Navigation/hamburger icon disappear when page link is clicked once

I'm designing a one-page scrolling website. When I click on a page link from the nav bar at screen widths less than 780px (when the hamburger icon appears), the hamburger icon disappears. I can't get it back unless I refresh the page. The nav bar also disappears at full screen width after clicking on a page link once. I would like to keep the hamburger icon and the top navigation in view at all times. The javascript I'm using to collapse the full-screen menu that shows up at 780px is causing this problem, but I need it, or the menu will not disappear when a link is clicked. Thank you to anyone who can help!
$(document).ready(function() {
$('a').click(function() {
$('#menu').slideToggle();
});
});
#media screen and (max-width: 780px) {
nav {
width: 100%;
margin: 0;
padding: 0;
position: relative;
left: 0;
display: block;
opacity: 1.0 !important;
filter: alpha(opacity=100); /* For IE8 and earlier */
}
nav ul {
width: 100%;
margin: 0 auto;
padding: 0;
display: none;
float: none;
}
nav ul li {
font-size: 1.3em;
font-weight: normal;
line-height: 40px;
width: 100% !important;
margin: 0;
padding: 0;
}
nav ul li:nth-of-type(1) { margin-top: 20%; }
nav ul li:hover { background: #565758; }
nav ul li a {
color: white !important;
font-family: "Lato", sans-serif;
border-bottom: none !important;
display: inline-block;
}
nav ul li a.active-link {
color: white !important;
font-size: 1.3em;
}
nav ul li a:hover {
color: white;
width: 100%;
}
/*Display 'show menu' link*/
.show-menu {
margin: 0 !important;
padding: 1em !important;
text-align: right;
display: block;
float: right;
}
/*Show menu when invisible checkbox is checked*/
input[type=checkbox]:checked ~ #menu { background-color: #747475 !important; display: block; height: 100vh; }
}​
<header>
<nav>
<label for="show-menu" class="show-menu"><img src="hamburger.png" alt="Hamburger Menu Icon" style="width: 15%;"></label>
<input type="checkbox" id="show-menu" role="button">
<ul id="menu">
<li>HOME
<li>ABOUT</li>
<li>PORTFOLIO</li>
<li>CONTACT</li>
</ul>
</nav>
<div id="logo"><img src="logo-grey.png" alt="Logo" style="max-width:100%; height:auto;"></div>
</header>​

You need to add the toggle to the checkbox as well. It is an jQuery function, that uses specific animations and styles.
$('#show-menu').click(function() {
$('#menu').slideToggle();
});
EDIT
I added a working example. I did not used the toggle here, for a better design. Now the menu also toggels with the click on the checkbox :-)
$(document).ready(function() {
$('a').click(function() {
$('#menu').slideToggle();
});
$('#show-menu').change(function() {
if(this.checked)
$('#menu').slideDown();
else
$('#menu').slideUp();
});
});
#media screen and (max-width: 780px) {
nav {
width: 100%;
margin: 0;
padding: 0;
position: relative;
left: 0;
display: block;
opacity: 1.0 !important;
filter: alpha(opacity=100); /* For IE8 and earlier */
}
nav ul {
width: 100%;
margin: 0 auto;
padding: 0;
display: none;
float: none;
}
nav ul li {
font-size: 1.3em;
font-weight: normal;
line-height: 40px;
width: 100% !important;
margin: 0;
padding: 0;
}
nav ul li:nth-of-type(1) { margin-top: 20%; }
nav ul li:hover { background: #565758; }
nav ul li a {
color: white !important;
font-family: "Lato", sans-serif;
border-bottom: none !important;
display: inline-block;
}
nav ul li a.active-link {
color: white !important;
font-size: 1.3em;
}
nav ul li a:hover {
color: white;
width: 100%;
}
/*Display 'show menu' link*/
.show-menu {
margin: 0 !important;
padding: 1em !important;
text-align: right;
display: block;
float: right;
}
/*Show menu when invisible checkbox is checked*/
input[type=checkbox]:checked ~ #menu { background-color: #747475 !important; display: block; height: 100vh; }
}​
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<header>
<nav>
<label for="show-menu" class="show-menu"><img src="hamburger.png" alt="Hamburger Menu Icon" style="width: 15%;"></label>
<input type="checkbox" id="show-menu" role="button">
<ul id="menu">
<li>HOME
<li>ABOUT</li>
<li>PORTFOLIO</li>
<li>CONTACT</li>
</ul>
</nav>
<div id="logo"><img src="logo-grey.png" alt="Logo" style="max-width:100%; height:auto;"></div>
</header>​

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