Develop Reference

CSS pointer-events: none while allowing hover

I'm trying to create an element of top my page which can be hovered. When hovered I want to change the opacity of the element and allow click through.
The thing is when I add the pointer-events: none to allow the click through, my hover is never triggered, which seems logic after all. I though I would be able to deal with it with JavaScript, but event mouseover or mouseenter is not compatible with pointer-events: none.
Here is my example with only CSS: If I add the pointer-events: none; it doesn't work. The element is the red banner, I want to be able to click the buttons underneath while being able to lower the opacity of it.
body {margin:0; padding:0;}
.title {font-weight:bold;margin-right:10px;}
.container {margin: 0 auto;width:80%;position:relative;overflow:hidden;}
.content {height:300px;border: 1px solid #c8c8c8;}
nav {background-color:#efebe0;padding:20px;}
button {padding:10px;background-color:#9ebf00;border: 1px solid #86a200;border-radius:5px;margin: 0 5px 0 5px;}
button.right {float:right;}
.bandeau {
position: absolute;
background: red none repeat scroll 0% 0%;
width: 300px;
height: 40px;
z-index: 2;
font-size: 30px;
color: white;
font-weight: bold;
text-align: center;
right: -70px;
transform: rotate(45deg);
top: 60px;
display: block;
transition: 0.2s ease-in-out;
pointer-events:none;
}
.bandeau:hover {
opacity: 0.4;
}
<div class="container">
<nav>
<span class="title">Dummy Example</span>
<button>Home</button>
<button>Pricing</button>
<button class="right">Contact us</button>
<button class="right">Log in</button>
</nav>
<div class="content"></div>
<div class="bandeau">
<span>I will be back !</span>
</div>
</div>
The other example with JavaScript:
document.addEventListener('DOMContentLoaded', function() {
var bandeau = document.getElementById("bandeau");
bandeau.addEventListener('mouseenter', e => {
bandeau.style.opacity = '0.4';
bandeau.style.pointerEvents = 'none';
});
bandeau.addEventListener('mouseleave', e => {
bandeau.style.opacity = '1';
bandeau.style.pointerEvents = 'auto';
});
}, false);
body {margin:0; padding:0;}
.title {font-weight:bold;margin-right:10px;}
.container {margin: 0 auto;width:80%;position:relative;overflow:hidden;}
.content {height:300px;border: 1px solid #c8c8c8;}
nav {background-color:#efebe0;padding:20px;}
button {padding:10px;background-color:#9ebf00;border: 1px solid #86a200;border-radius:5px;margin: 0 5px 0 5px;}
button.right {float:right;}
#bandeau {
position: absolute;
background: red none repeat scroll 0% 0%;
width: 300px;
height: 40px;
z-index: 2;
font-size: 30px;
color: white;
font-weight: bold;
text-align: center;
right: -70px;
transform: rotate(45deg);
top: 60px;
display: block;
transition: 0.2s ease-in-out;
}
<div class="container">
<nav>
<span class="title">Dummy Example</span>
<button>Home</button>
<button>Pricing</button>
<button class="right">Contact us</button>
<button class="right">Log in</button>
</nav>
<div class="content"></div>
<div id="bandeau">
<span>I will be back !</span>
</div>
</div>
Is there a way to achieve this or is it impossible?

In your example you could do it easily on a hover on the whole nav element like
nav:hover + .content + .bandeau { opacity: 0.4; }
Or you can move the banner element to the because it's an absolute positioned element. Then a hover on the login button (with the .right class) will make it transparent:
body {margin:0; padding:0;}
.title {font-weight:bold;margin-right:10px;}
.container {margin: 0 auto;width:80%;position:relative;overflow:hidden;}
.content {height:300px;border: 1px solid #c8c8c8;}
nav {background-color:#efebe0;padding:20px;}
button {padding:10px;background-color:#9ebf00;border: 1px solid #86a200;border-radius:5px;margin: 0 5px 0 5px;}
button.right {float:right;}
.bandeau {
position: absolute;
background: red none repeat scroll 0% 0%;
width: 300px;
height: 40px;
z-index: 2;
font-size: 30px;
color: white;
font-weight: bold;
text-align: center;
right: -70px;
transform: rotate(45deg);
top: 60px;
display: block;
transition: 0.2s ease-in-out;
pointer-events:none;
}
.right:hover + .bandeau {
opacity: 0.4;
}
<div class="container">
<nav>
<span class="title">Dummy Example</span>
<button>Home</button>
<button>Pricing</button>
<button class="right">Contact us</button>
<button class="right">Log in</button>
<div class="bandeau">
<span>I will be back!</span>
</div>
</nav>
<div class="content"></div>
</div>
I know it's a bit different than a hover on the banner itself, but maybe this can give you some ideas :)

I found a solution based on a comment on the thread linked by #yanca.
I use document.elementFromPoint to chekc what cursor I should display (pointer or auto) based on the lement below the banner. Then I reuse document.elementFromPoint to transfer the click through
Here is the code :
document.addEventListener('DOMContentLoaded', function() {
var bandeau = document.getElementById("bandeau");
bandeau.addEventListener('mousemove', e => {
bandeau.style.display = "none";
var elemUnder = document.elementFromPoint(e.clientX, e.clientY);
bandeau.style.display = "block";
var stylesUnder = getComputedStyle(elemUnder);
bandeau.style.cursor = stylesUnder.cursor;
});
bandeau.addEventListener('click', e => {
bandeau.style.display = "none";
var elemUnder = document.elementFromPoint(e.clientX, e.clientY);
bandeau.style.display = "block";
elemUnder.click();
});
}, false);
body {margin:0; padding:0;}
.title {font-weight:bold;margin-right:10px;}
.container {margin: 0 auto;width:80%;position:relative;overflow:hidden;}
.content {height:300px;border: 1px solid #c8c8c8;}
nav {background-color:#efebe0;padding:20px;}
button {padding:10px;background-color:#9ebf00;border: 1px solid #86a200;border-radius:5px;margin: 0 5px 0 5px;cursor:pointer;}
button.right {float:right;}
#bandeau {
position: absolute;
background: red none repeat scroll 0% 0%;
width: 300px;
height: 40px;
z-index: 2;
font-size: 30px;
color: white;
font-weight: bold;
text-align: center;
right: -70px;
transform: rotate(45deg);
top: 60px;
display: block;
transition: 0.2s ease;
}
#bandeau:hover {
opacity:0.4;
transition: 0.2s ease;
}
<div class="container">
<div id="body">
<nav>
<span class="title">Dummy Example</span>
<button>Home</button>
<button>Pricing</button>
<button class="right" onclick="alert('click contact')">Contact us</button>
<button class="right" onclick="alert('click login')">Log in</button>
</nav>
<div class="content"></div>
<div>
<div id="bandeau">
<span>I will be back !</span>
</div>
</div>
Thanks for the help !!

Open and close lightbox

I make a lightbox, but I have a little problem.
I can close the lightbox when I click on the X button, but I want to close the lightbox when I click outside the box too.
And the second isuee, is when I have on open lightbox and I click on another. The first don't close and then, I have two lightbox opened.
Any idea guys?
Thanks for all :)

$(document).ready(function(){
$("a#show-panel").click(function(){
$("#lightbox, #lightbox-panel").fadeIn(300);
});
$("a#close-panel").click(function(){
$("#lightbox, #lightbox-panel").fadeOut(300);
})
});
.full_section_inner { z-index: auto; }
.link { width: 100% height: auto; position: absolute; cursor: pointer; }
.link:hover { text-decoration: underline; }
#link-text { width: 100%; position: absolute; bottom: 0px; font-size: 20px; line-height: 22px; letter-spacing: 0px; }
.status { position: absolute; top: 0; left: -100vw; }
.status:checked ~ .content { -webkit-transform: none; transform: none; }
.status:checked ~ .backdrop { bottom: 0; opacity: 1; z-index: 1; transition: 0.3s opacity ease-in-out; }
.lightbox { position: fixed; right: 0; left: 0; height: 0; padding: 0; z-index: 100; top: 20%; }
.lightbox .content { display: flex; flex-direction: column; overflow: hidden; position: relative; z-index: 2; max-width: 550px; max-height: 80vh; margin: 20px auto; padding: 25px; background: #fff; -webkit-transform: translateY(-200%); transform: translateY(-200%); transition: 0.3s -webkit-transform ease-in-out; transition: 0.3s transform ease-in-out; transition: 0.3s transform ease-in-out, 0.3s -webkit-transform ease-in-out; border: 3px solid; }
.lightbox .header-lightbox { display: flex; flex-wrap: nowrap; justify-content: space-between; align-items: center; padding-bottom: 15px; }
.lightbox .header-lightbox h2 { margin: 0; font-size: 28px; line-height: 30px; }
.button { font-size: 30px; }
.button:hover { cursor: pointer; }
.text-lightbox { font-family: sans-serif; font-size: 16px; line-height: 20px; color: #000; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label class="link" for="lightbox-1">
<h2 id="link-text">Ona Bros</h2>
</label>
<aside class="lightbox">
<input type="checkbox" class="status" id="lightbox-1" />
<article class="content">
<header class="header-lightbox">
<h2>Title</h2>
<label class="button" for="lightbox-1">X</label>
</header>
<main class="text-lightbox">
<p>Lorem ipsum dolor sit amet.</p>
</main>
</article>
</aside>
Without code samples it might be kind of hard to answer, but in theory, you could try something like this:
I can close the lightbox when I click on the X button, but I want to close the lightbox when I click outside the box too.
I would try to have a light grey, transparent background come up as well covering the whole screen, and on click of that, it can close the lightbox
And the second isuee, is when I have on open lightbox and I click on another. The first don't close and then, I have two lightbox opened.
I would have some variable at a higher level as a sort of control for the lightbox. If you see it is true, you can either prevent the second lightbox from opening, or you can close the first one and open the second.

Onclick/offclick? JS Timer? How to make each one work repeatedly

I am new to JS and using so i am attempting to make this image slider work to my advantage. I want o make each thumbnail clickable to make the larger image slide into place. I was able to make this work with a CSS hover effect but i need it to work on click instead. I got it working but you can only click it once. the images don't revert back down to their original state how do i fix this? is there a timer setting so that it would revert after 1 second? or it auto resets when you click a different thumb?
https://jsfiddle.net/Lumberjack225/t7r17r92/
HTML
<script>
function myFunction() {
document.getElementById("demo").style.top = "100px";
}
function myFunction2() {
document.getElementById("demo2").style.top = "100px";
}
function myFunction3() {
document.getElementById("demo3").style.top = "100px";
}
</script>
<!-- Mobile Slider -->
<div class="mobileslider">
<div class="innermobile">
<div class="container3">
<span onclick="myFunction()" href="#">
<img class="thumb" src="https://images.unsplash.com/photo-1460899960812-f6ee1ecaf117?crop=entropy&fit=crop&fm=jpg&h=975&ixjsv=2.1.0&ixlib=rb-0.3.5&q=80&w=1400" width="75px" height="75px">
<img id="demo" class="big2" src="https://images.unsplash.com/photo-1460899960812-f6ee1ecaf117?crop=entropy&fit=crop&fm=jpg&h=975&ixjsv=2.1.0&ixlib=rb-0.3.5&q=80&w=1400" width="300px">
</span>
<span onclick="myFunction2()" href="#">
<img class="thumb" src="https://images.unsplash.com/photo-1460400355256-e87506dcec4f?crop=entropy&fit=crop&fm=jpg&h=975&ixjsv=2.1.0&ixlib=rb-0.3.5&q=80&w=1400" width="75px" height="75px">
<img id="demo2" class="big2" src="https://images.unsplash.com/photo-1460400355256-e87506dcec4f?crop=entropy&fit=crop&fm=jpg&h=975&ixjsv=2.1.0&ixlib=rb-0.3.5&q=80&w=1400" width="300px">
</span>
<span onclick="myFunction3()" href="#">
<img class="thumb" src="https://images.unsplash.com/photo-1453230806017-56d81464b6c5?crop=entropy&fit=crop&fm=jpg&h=975&ixjsv=2.1.0&ixlib=rb-0.3.5&q=80&w=1400" width="75px" height="75px">
<img id="demo3" class="big2" src="https://images.unsplash.com/photo-1453230806017-56d81464b6c5?crop=entropy&fit=crop&fm=jpg&h=975&ixjsv=2.1.0&ixlib=rb-0.3.5&q=80&w=1400" width="300px">
</span>
<a href="#">
<center> <img class="big2 featuredm" src="https://images.unsplash.com/photo-1456318019777-ccdc4d5b2396?crop=entropy&fit=crop&fm=jpg&h=975&ixjsv=2.1.0&ixlib=rb-0.3.5&q=80&w=1400" width="300px"></center>
</a>
</div>
</div>
</div>
CSS
.container3 {
position: relative;
height: 297px;
width: 95%;
overflow: hidden;
margin-right: auto;
margin-left: auto;
margin-bottom: 0;
}
.container3 a {
float: left;
margin-top: 9px;
margin-right: 9px;
margin-left: 9px;
margin-bottom: 9px;
}
.container3 span {
float: left;
margin-top: 9px;
margin-right: 9px;
margin-left: 9px;
margin-bottom: 9px;
}
.container2 {
position: relative;
height: 660px;
width: 960px;
overflow: hidden;
margin: 0 auto;
}
.container2 a {
float: left;
margin: 20px;
}
.big {
position: absolute;
top: 260px;
left: 20px;
}
.big2 {
position: absolute;
top: 100px;
left: 0px;
}
.big {
position: absolute;
top: 900px;
left: 20px;
-webkit-transition: top .5s ease;
-moz-transition: top .5s ease;
-o-transition: top .5s ease;
-ms-transition: top .5s ease;
transition: top .5s ease;
}
.big2 {
position: absolute;
top: 900px;
-webkit-transition: top .5s ease;
-moz-transition: top .5s ease;
-o-transition: top .5s ease;
-ms-transition: top .5s ease;
transition: top .5s ease;
margin-left: auto;
margin-right: auto;
}
.featured {
top: 260px;
left: 20px;
z-index: -3;
}
.featuredm {
top: 100px;
left: 0px;
z-index: -3;
}
a:hover .thumb {
-webkit-box-shadow: 0px 0px 15px rgba(0,0,0,0.5);
-moz-box-shadow: 0px 0px 15px rgba(0,0,0,0.5);
box-shadow: 0px 0px 15px rgba(0,0,0,0.5);
}
a:hover .big {
top: 260px;
}
span:hover .thumb {
-webkit-box-shadow: 0px 0px 15px rgba(0,0,0,0.5);
-moz-box-shadow: 0px 0px 15px rgba(0,0,0,0.5);
box-shadow: 0px 0px 15px rgba(0,0,0,0.5);
}
.featured2 {
top: 260px;
left: 20px;
z-index: -3;
}

To reset the position, we never change the individual top position for the .big2 images. Instead, lets create a new class that we apply to the selected image.
css:
.selected {
top: 100px;
}
Whenever we click a thumb. We will add or remove this class from the .big2 images to move them up and down. Then we add it to the image corresponding to the clicked thumb.
javascript:
We grab all elements with the .thumb class and store them in an array called thumbs, we do the same with the .big2 and store them in bigs.
var thumbs = document.querySelectorAll('.thumb');
var bigs = document.querySelectorAll('.big2');
We now have two lists with the same order, eg: thumbs[thumb0,thumb1,thumb2], bigs[big0,big1,big2]. Lets add some click events to our thumbs. We loop through the thumb list. For every item in the list, we add a click event listener.
Inside this listener function, we run our function returnAll(), which removes the .selected class from all items in the bigs list. We then add the selected class to the big at the same position in the list as the thumb we just clicked.
for (i = 0; i < thumbs.length; i++) {
(function(i) {
thumbs[i].addEventListener('click', function() {
returnAll();
bigs[i].classList.add("selected")
});
})(i);
}
function returnAll(){
for (i = 0; i < bigs.length; i++) {
bigs[i].classList.remove("selected");
}
}
Here is your fiddle, updated with the above code:
https://jsfiddle.net/t7r17r92/3/
Notice that I moved all javascript into a "file" of its own, for clarity.
Good luck!

making a toggle button to change panels

I have two panels at the top of my application and one button at the button. By default only panel one must be visible, but by clicking on the button panel one fades away, and panel two fades in. I created the layout, but I do not know how to achieve it.
$(".panel2").hide();
$(document).ready(function() {
$(".grid-button").on("click", function() {
$(".grid").toggleClass("open close");
});
});
div.app {
margin:50px auto;
width: 400px;
height: 400px;
border-radius:10px;
overflow: hidden;
position: relative;
}
div.app > .blur {
width: 100%;
height: 100%;
background: url(http://goo.gl/0VTd9W);
-webkit-filter: blur(5px);
}
div.mainSection, div.dashboard{
position: absolute;
left: 0px;
text-align:center;
color:#fff;
font-size:20px;
}
div.mainSection{
width:100%;
height:85%;
background:rgba(0,0,0,0.5);
top:0;
}
div.dashboard{
width:100%;
height:15%;
background:rgba(255,0,0,0.5);
bottom:0;
}
div.mainSection > .panel1,
div.mainSection > .panel2 {
width: 100%;
Height: 100%;
Background: rgba(0, 0, 0, 0.5);
position: absolute;
left: 0px;
top: 0px;
}
.grid-button {
background: none;
border: none;
padding: 3px;
width: 100%;
}
.grid {
display: inline-block;
height: 4px;
position: relative;
width: 32px;
transition: all 0.3s ease-in-out;
}
.grid:after, .grid:before {
content: '';
position: absolute;
background-color: #FFF;
display: inline-block;
height: 4px;
left: 0;
width: 32px;
transition: all 0.3s ease-in-out;
}
.grid.open {
background-color: #FFF;
}
.grid.open:after {
top: 10px;
}
.grid.open:before {
top: -10px;
}
.grid.close {
background-color: transparent;
transform: scale(0.9);
}
.grid.close:after, .grid.close:before {
top: 0;
transform-origin: 50% 50%;
}
.grid.close:before {
transform: rotate(135deg);
}
.grid.close:after {
transform: rotate(45deg);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="app">
<div class="blur"></div>
<div class="mainSection">
<div class="panel1">Panel1</div>
<div class="panel2">Panel2</div>
</div>
<div class="dashboard">
<div class="grid-button">
<span class="grid open"></span>
</div>
</div>
</div>
First of all since I did $('.panel2').hide();, in page load first it loads the panel then hides it. How can I make it invisible from the beginning?
Secondly how can I make the panel2 visible only by pressing the button?
And finally is there anyway to add some transitions effects for changing panels?

You may try:
$(".grid-button").on("click", function() {
var visibleObj = $('.mainSection div:visible');
var inVisibleObj = $('.mainSection div:hidden');
visibleObj.fadeOut(500, function() {
inVisibleObj.fadeIn(500);
});
});
While for the visibility you need:
<div class="panel2" style="display: none;">Panel2</div&gt
The running snippet:
$(function () {
$(".grid-button").on("click", function() {
var visibleObj = $('.mainSection div:visible');
var inVisibleObj = $('.mainSection div:hidden');
visibleObj.fadeOut(500, function() {
inVisibleObj.fadeIn(500);
});
});
});
div.app {
margin:50px auto;
width: 400px;
height: 400px;
border-radius:10px;
overflow: hidden;
position: relative;
}
div.app > .blur {
width: 100%;
height: 100%;
background: url(http://goo.gl/0VTd9W);
-webkit-filter: blur(5px);
}
div.mainSection, div.dashboard{
position: absolute;
left: 0px;
text-align:center;
color:#fff;
font-size:20px;
}
div.mainSection{
width:100%;
height:85%;
background:rgba(0,0,0,0.5);
top:0;
}
div.dashboard{
width:100%;
height:15%;
background:rgba(255,0,0,0.5);
bottom:0;
}
div.mainSection > .panel1,
div.mainSection > .panel2 {
width: 100%;
Height: 100%;
Background: rgba(0, 0, 0, 0.5);
position: absolute;
left: 0px;
top: 0px;
}
.grid-button {
background: none;
border: none;
padding: 3px;
width: 100%;
}
.grid {
display: inline-block;
height: 4px;
position: relative;
width: 32px;
transition: all 0.3s ease-in-out;
}
.grid:after, .grid:before {
content: '';
position: absolute;
background-color: #FFF;
display: inline-block;
height: 4px;
left: 0;
width: 32px;
transition: all 0.3s ease-in-out;
}
.grid.open {
background-color: #FFF;
}
.grid.open:after {
top: 10px;
}
.grid.open:before {
top: -10px;
}
.grid.close {
background-color: transparent;
transform: scale(0.9);
}
.grid.close:after, .grid.close:before {
top: 0;
transform-origin: 50% 50%;
}
.grid.close:before {
transform: rotate(135deg);
}
.grid.close:after {
transform: rotate(45deg);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="app">
<div class="blur"></div>
<div class="mainSection">
<div class="panel1">Panel1</div>
<div class="panel2" style="display: none;">Panel2</div>
</div>
<div class="dashboard">
<div class="grid-button">
<span class="grid open"></span>
</div>
</div>
</div>

To make one of the panels hidden in the first place, I'd use a css class called hidden:
.hidden{
display : none;
}
Which simply makes what it sounds like, hiding the element.
Than, I'd set this class in the HTML decleration:
<div class="panel2 hidden">Panel2</div>
That will hide panel2 on page load, and by that you don't have to hide it using js code.
Than, I'd use a helper css class called panel that stands to be a panel identifier (you can either use the data attribute, or any other way of identifying those elements).
For 5 panels, it would look like this:
<div class="panel panel1">Panel1</div>
<div class="panel panel2 hidden">Panel2</div>
<div class="panel panel3 hidden">Panel3</div>
<div class="panel panel4 hidden">Panel4</div>
<div class="panel panel5 hidden">Pane5</div>
At last, to make this work for any number of panels you want (not necesseraly 2), I'd use a "carousel" effect to toggle the panels visibility, while having a way to keep track with them (adding and removing the hidden class), and use the fadeIn/fadeOut effect. (again, instead of identifying the panels using the panel1,panel2,panel3... classes, you can always use the data attribute (please read more about it in jQuery docs), or in any other way).
var currentPanel = 1;
$(".grid-button").on("click", function() {
$(".grid").toggleClass("open close");
$(".panel"+currentPanel).fadeOut("normal", function(){
$(this).addClass('hidden');
});
currentPanel = currentPanel >= $(".panel").length ? 1 : currentPanel+1;
$(".panel"+currentPanel).fadeIn().removeClass('hidden');
});
Just note that the hidden class actually "looses" it's functionality after the first click, since jQuery changes the display property inline, but I think that it might not be harmful to keep them anyway (it will be easier to track them).
You can see an example here: https://jsfiddle.net/j79y5kdb/3/

Hiding a text when a sections width is set to 0

so I've had a bit of a problem with trying to make a section's width to 0 and have everything inside the object do the same thing. Essentially hide the section and everything inside it. Thing is, the section will change to a width of 0px but the text inside still displays and also sort of pushes off to the side. Is there any way that I can use either css or javascript to hide the text and bring it back when the sections width changes back over?
Code pasted into jsfiddle:
http://jsfiddle.net/t6ck9ajb/
$(document).ready(function(){
$("#about").click(function(){
if ($("#about-me").css("width") <= "0vw") {
$("#introduction").animate({width:"0vw"}, 500);
/*$("#intro").css("display","none");
$("#port").css("display","none");
$("#about").css("display","none"); */
}
else {
$("#introduction").animate({width:"0vw"});
}
});
});
This is what I have to attempt at hiding the text, but this didn't really hide it.

Here is a different approach:
$(function(){
$('#about').on('click', homeAboutToggle);
$('#home').on('click', homeAboutToggle);
});
function homeAboutToggle(){
$('#introduction').toggleClass('active');
$('#about-me').toggleClass('active');
}
* {
margin: 0px 0px;
padding: 0px 0px;
font-family: "Open Sans";
}
#container{
width: 100vw;
height: 100vh;
overflow:hidden;
position:relative;
}
.full-page {
width: 100vw;
height: 100vh;
background-color: #5085aa;
position: absolute;
float: left;
transition:all ease-in-out 400ms;
-webkit-transition:all ease-in-out 400ms;
}
.full-page.right{
transform: translateX(100vw);
-webkit-transform: translateX(100vw);
}
.full-page.left{
transform: translateX(-100vw);
-webkit-transform: translateX(-100vw);
}
.full-page.active{
transition:all ease-in-out 400ms;
-webkit-transition:all ease-in-out 400ms;
transform: translateX(0);
-webkit-transform: translateX(0);
}
#introduction {
z-index: 1;
}
#about-me {
z-index: 0;
}
#information {
text-align: center;
}
#intro {
font-size: 4vw;
color: white;
text-align: center;
padding-top: 30vh;
}
#port{
position: absolute;
right: 3vw;
bottom: 5vh;
color: white;
font-size: 1.5vw;
text-decoration: none;
font-weight: bold;
}
#home,
#about{
position: absolute;
left: 3vw;
bottom: 5vh;
color: white;
font-size: 1.5vw;
text-decoration: none;
font-weight: bold;
}
#about:active #about-me {
width: 100vw;
}
.big {
font-size: 8vw;
color: lightblue;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<div id="container">
<section class="full-page right" id="about-me">
<h1 id="information">About Me</h1>
<a id="home">Back home</a>
</section>
<section class="full-page left active" id="introduction">
<h1 id="intro">Hello, my name is<br/><span class="big">Michael!</span> </h1>
<a id="port">Portfolio</a>
<a id="about">About Me</a>
</section>
</div>
</body>

If you're wanting to hide the content when the '#about' selector is clicked, why not just use $('#introduction').toggle()?

This a CSS issue. You need to add overflow: hidden; to whatever you want to be hidden with a change of width, in this case #intro.

Here a working fiddle with the intended animation: fiddle
CSS:
#introduction {
z-index: 1;
visibility:"visible";
overflow:hidden;
}
jQuery
$(document).ready(function () {
$("#about").click(function () {
if ($("#about-me").css("width") <= "0px") {
$("#introduction").animate({
width: "0px"
}, 500, function () {
$("#introduction").css("visibility", "hidden");
})
} else {
$("#introduction").animate({
width: "0px"
});
}
});
});