We Keep Coding

How to build a CSS animation that "slides in", revealing a text/div after it finishes sliding?

I am trying to mimic the CSS animations from a website here: https://stanographer.com/
I want to copy the way the site:
starts by showing a full screen black div sliding away to the right
"loads" the black background (div tags) behind text (as in "Hi, I'm Stanley Sakai"), expanding left to right and
"loads" the text over the black background div, expanding left to right.
Now you might ask, "Why not just inspect the page, look at the classes on the divs and text, then inspect the CSS sheet in the network tab?" And I've tried that. The CSS looks weird. My friend said it is pre-processed by SASS, whatever that means. Anyway, I cannot decipher the code.
I've been to a few different StackOverflow pages (here's one) & over a dozen different pages on Google. I learned about using keyframes but I haven't figured out how to recreate the effect on Stanographer.com. My friend, who owns the website, also provided this example, but I don't get how to apply it to individual divs. He said something about using the z-index but I just don't see it.
I know that to make the page start with a full black screen & then slide out, I have to trigger a class change using JavaScript. I have:
let blackStuff = document.getElementById("blackness");
window.addEventListener("load", () => {
console.log("loaded");
blackStuff.setAttribute("class", "black-box-out");
},
false
);
.black-box {
position: fixed;
float: left;
top: 0;
width: 100%;
height: 100%;
bottom: 0;
background-color: #000;
z-index: 999999;
-webkit-animation: powerslide 0.5s forwards;
-webkit-animation-delay: 2s;
animation: powerslide 0.5s forwards;
animation-delay: 2s;
}
#-webkit-keyframes powerslide {
100% {
left: 0;
}
}
#keyframes powerslide {
100% {
left: 0;
}
}
.black-box-out {
margin-left: 100%;
animation: slide 0.5s forwards;
-webkit-transition: slide 0.5s forwards;
transition: slide 0.5s forwards;
}
<div id="blackness" class="black-box"></div>
But this just makes the "blackness" div disappear instantly on page load. I want it to slide out. Clearly, I don't get how to use CSS animations.
If you are interested in seeing more of what doesn't work, read on. Otherwise, you can skip this section: it only shows my failed trials.
I've learned how to make a CSS animation expand horizontally from 0:
.wrapper {
position: relative;
overflow: hidden;
width: 500px;
height: 50px;
border: 1px solid black;
}
.slide-custom {
width: 500px;
height: 50px;
background: cyan;
position: relative;
-webkit-animation: slideIn 2s forwards;
animation: slideIn 2s forwards;
}
/* moz and webkit keyframes excluded for space */
#keyframes slideIn {
0% {
transform: scaleX(0);
}
100% {
transform: scaleX(1);
}
}
<div class="wrapper slide-custom">
<h1 class="slide-custom">
<span>MEET ROLY POLY.</span>
<!-- expands horizontally from 0 width to 100% width -->
</h1>
</div>
And I've learned to make text "slide in" from the left, though it starts at 100% width when I want it to start at 0% width:
/* CSS */
.test-slide {
animation-duration: 3s;
animation-name: testSlide;
}
#keyframes testSlide {
from {
margin-left: 0%;
width: 50%;
}
to {
margin-left: 100%;
width: 100%;
}
}
<div class="test-slide">
<h1><span>ABOUT.</span></h1>
<!-- will slide in from the left -->
</div>
There's more -- unfortunately none of it mimics the website I'm trying to copy.

Explanation
There are multiple ways to achieve what you want actually. I did not opt to animate width. The first few frames of the animation will be not as expected.
So instead, we can use clip-path. What clip-path basically does is masking. You can "crop" a div such that only a part of it is visible. We will utilise clip-path and ::before or ::after pseudo-element (either is fine) to create this animation. What we need to do:
Create the pseudo-element and position it such that it covers (is on top) the whole animatable element (position: absolute)
Set the pseudo-element's background to black
Using clip-path, mask the animatable element to display no parts of the element (this will also cause the pseudo-element to not be displayed as it is part of the element). The direction of the clipping is important. The direction here is from the right side to the left side.
Using animation and #keyframes, unmask the previously masked div. This will reveal it slowly from the left side to the right side (because initially, we masked it from the right to left; upon unmasking, the reverse direction happens)
Upon unmasking the element, the pseudo-element will be on top of the text we want to display
After a short while later, mask the pseudo-element (not the whole element) from the right direction to the left direction, again using clip-path so that the text seems revealed slowly
It works! However, I recommend reading about clip-path. Also, one really handy clip-path CSS generator I really like to use is this (if you want to clip from the right to left, you should drag the points from the right to left). I also highly recommend reading about CSS positioning (a staple in good CSS animations). You needn't be using z-index: 9999; you generally want to keep track of the z-index you use.
Solution
Here's a working solution using the described method. Try running it.
* {
box-sizing: border-box;
margin: 0;
padding: 0;
font-family: Helvetica;
}
body,
html {
width: 100%;
height: 100%;
}
#wrapper {
background: #555555;
width: 100%;
height: 100%;
color: white;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
#wrapper * {
margin: 5px;
}
.heading {
font-size: 3em;
padding: 10px 5px;
}
.caption {
font-size: 1em;
padding: 5px;
font-family: Courier;
}
.animatable {
position: relative;
clip-path: polygon(0 0, 0 0, 0 100%, 0% 100%);
animation: .75s cubic-bezier(1,-0.01,.12,.8) 1s 1 reveal forwards;
}
.animatable::after {
content: '';
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: #20262b;
padding: inherit;
animation: .75s cubic-bezier(1,-0.01,.12,.8) 1.75s 1 hideBlack forwards;
}
#keyframes reveal {
from { clip-path: polygon(0 0, 0 0, 0 100%, 0% 100%); }
to { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
}
#keyframes hideBlack {
from { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
to { clip-path: polygon(100% 0, 100% 0, 100% 100%, 100% 100%); }
}
<div id="wrapper">
<div class="heading animatable">Hi, I am Richard!</div>
<div class="caption animatable">I am a person.</div>
</div>
Although the simple animation you wanted can be created using merely CSS, I still suggest you read about how to make animations using JavaScript and the various libraries it has in making animations. This is because once there are many animations and transitions going on, it becomes hard to keep track of animations (especially when you want animations to start after another animation ends). A good library is anime.js (do explore more options before settling on one). Furthermore, notice how the animations only appear upon scrolling down in the website you provided? That's doable only with JS (one such method is using IntersectionObserver API provided by most browsers).

Here you have some CSS3 animations, you trigger that animation when the .entrance-animation gets the .active class.
You'll need an observer to watch when the item gets into view and, when the item is visible, you add the .active class to it.
Hope it helps!
setTimeout(() =>
{
let animate = document.querySelectorAll('.entrance-animation');
animate.forEach(item => item.classList.add('active'));
}
,1000);
.entrance-animation
{
position: relative;
color: blueviolet;
white-space: nowrap;
font-size: 24px;
width: 0;
overflow: hidden;
transition: width 0.5s ease;
}
.entrance-animation::before
{
content: '';
position: absolute;
top: 0;
right: 0;
height: 100%;
width: 100%;
background-color: black;
z-index: 10;
transition: width 0.5s ease;
transition-delay: 0.5s;
}
.entrance-animation.active
{
width: 100%;
}
.entrance-animation.active::before
{
width: 0%;
}
<p class="entrance-animation">
Hello
</p>
<p class = "entrance-animation">
Here we are
</p>

You can use CSS3 transitions or maybe CSS3 animations to slide in an element.
For browser support: http://caniuse.com/
I made two quick examples just to show you how I mean.
CSS transition (on hover)
Demo One
Relevant Code
.wrapper:hover #slide {
transition: 1s;
left: 0;
}
In this case, Im just transitioning the position from left: -100px; to 0; with a 1s. duration. It's also possible to move the element using transform: translate();
CSS animation
Demo Two
#slide {
position: absolute;
left: -100px;
width: 100px;
height: 100px;
background: blue;
-webkit-animation: slide 0.5s forwards;
-webkit-animation-delay: 2s;
animation: slide 0.5s forwards;
animation-delay: 2s;
}
#-webkit-keyframes slide {
100% { left: 0; }
}
#keyframes slide {
100% { left: 0; }
}
Same principle as above (Demo One), but the animation starts automatically after 2s, and in this case I've set animation-fill-mode to forwards, which will persist the end state, keeping the div visible when the animation ends.
Like I said, two quick example to show you how it could be done.
EDIT: For details regarding CSS Animations and Transitions see:
Animations
https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Using_CSS_animations
Transitions
https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Using_CSS_transitions
Hope this helped.

overflow:hidden, what am i doing wrong here

I have explicitly positioned divs, inside a parent div tag. The thing is, when I resize my browser window, i am able to scroll to the specified div position which I don't want to. I tried using overflow and it kinda does nothing other than hiding the div completely. I am clearly missing something here. How do I hide the image when I resize my browser window ? How can I solve this ?
.Topics__imageContainer {
position: absolute;
-webkit-transition: opacity .5s,-webkit-transform .5s;
transition: opacity .5s,-webkit-transform .5s;
transition: transform .5s,opacity .5s;
transition: transform .5s,opacity .5s,-webkit-transform .5s;
}
.Topics__image {
border-radius: 50%;
border: 3px solid #fff;
background-color: #fff;
box-sizing: content-box;
overflow-x:hidden;
display:inline-block;
}
.icon_wrapper_inner{
overflow-x: hidden;
position: relative;
}
<div class="icon_wrapper_inner">
<div class="Topics__imageContainer" style="opacity: 1; left: 1380px; top:268px;">
<div class="Topics__image Topics__image--far" style="width:50px;height:50px;background:url('http://4hdwallpapers.com/wp-content/uploads/2013/05/Emo-Star-Dekstop-Background-728x546.jpg');background-size:100%">
</div>
</div>
</div>

Try reversing the hidden logic in the CSS.
overflow: hidden;
overflow-y: auto;

I fixed it by adding overflow:hidden inside html in bootstrap.css. Now the overflow is hidden as i resize my browser preventing it from scrolling.
html {
font-size: 62.5%;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
overflow-x:hidden;
}

How to zoom out a div using animations?

I have a DIV that is covering the whole page (height and width are 100%). I am trying to use CSS (and possibly JavaScript) to create a zoom out animation effect so the DIV is smaller (making everything inside the div - its children - smaller as well) to a specific point on the page (middle of the page) and to a specific width and height (let's say 100 * 100px for example).
I am starting with the following code:
<div id="toBeZoomedOut">
<div>something</div>
<div><img src="background.jpg"></div>
</div>
#toBeZoomedOut {
background-color: black;
border: 1px solid #AAAAAA;
color: white;
width: 300px;
height: 300px;
margin-left: auto;
margin-right: auto;
-webkit-transition: 1s ease-in-out;
-moz-transition: 1s ease-in-out;
transition: 1s ease-in-out;
}
#toBeZoomedOut img {
height: 250px;
width: 250px;
}
#toBeZoomedOut:hover {
zoom: 0.5;
}
The issue with this code is that it zooms out on component down (the parent div) and immediately zooms out what's inside it then goes back to zoom in the components.
Basically it is a little buggy. Any helpful fixes to make it zoom out everything together? It would be great if I can zoom out everything together to a specific location on the page and to a specific width/height (for example, zoom everything out to left: 100px, top: 100px and the parent div should be: 100px * 100px and everything else is relative in size).
I understand this might be easier with JavaScript? Any help?
One final note, if you notice the animation is not really reflecting a zoom animation. Although this would be an additional plus, the actual zoom animation would be great.
JSFiddle link to make it easier: http://jsfiddle.net/HU46s/

I am using the universal selector to target everything inside of the parent container to have the css transitions applied to it.
The next thing I did was changed the inside contents width to a % for ease of scaling.
Here is the css:
#toBeZoomedOut * {
-webkit-transition: all 1s ease;
-moz-transition: 1s ease;
transition: 1s ease;
}
Finally, a fiddle: Demo

To make all images and div backgrounds zoom at the same time you have to use percentage size for #zoomer-inside elements and set a specific font-sizes...
However is not smooth, if you want a smoother result, I suggest you use a jQuery in combination with some animation() method or plugin.
Fiddle: http://jsfiddle.net/HU46s/1/
Code:
#toBeZoomedOut {
background-color: black;
border: 1px solid #AAAAAA;
color: white;
width: 300px;
height: 300px;
margin-left: auto;
margin-right: auto;
-webkit-transition: all 1s ease-in-out;
-moz-transition: all 1s ease-in-out;
transition: all 1s ease-in-out;
}
#toBeZoomedOut div, #toBeZoomedOut img {
width: 90%;
font-size: 20px;
}
#toBeZoomedOut img {
height: 90%;
width: 90%;
}
#toBeZoomedOut:hover {
zoom: 0.5;
}
smoother by jQuery:
Fiddle: http://jsfiddle.net/HU46s/5/
Code:
jQuery - smoother solution (even less CSS):
$('#toBeZoomedOut').hover( /* change the animation speed as you want :) */
function(){
$(this).animate({ 'zoom': 0.5}, 400); //animation speed 400=0.4s !
},
function(){
$(this).animate({ 'zoom': 1}, 400); //animation speed 400=0.4s !
}
);
...with this only CSS you need is:
#toBeZoomedOut {
background-color: black;
border: 1px solid #AAAAAA;
color: white;
width: 300px;
height: 300px;
margin-left: auto;
margin-right: auto;
}
#toBeZoomedOut img {
width: 250px;
}

how can I achieve this hover effect? Tried several methods with no luck [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions concerning problems with code you've written must describe the specific problem — and include valid code to reproduce it — in the question itself. See SSCCE.org for guidance.
Closed 9 years ago.
Improve this question
Hey guys how can I achieve a hover effect like the one used on the site below?
http:// minimalmonkey .com/
My current HTML:
http://pastebin.com/jCiy0ghX
And my CSS:
http://pastebin.com/WeQBDx8b
Tried lots of different methods such as borders on hover & width change on hover but didn't have any luck..
Thanks in advance, Luke.

I tried to make it similar, there is couple of things to have in mind according to details:
when it grows content don't move from position - that's why
padding is affected
Column tends to growing around its center - margin and border altered at the same time to accomplish that.
Outer columns seems to fade into background - opacity changes because of that for them.
Apart from creating a container to wrap columns, everything is plain CSS
modified CSS:
/* Column Styling CSS */
#left-column{
background-color: #27ae60;
left:0;
border-color:#27ae60;
}
#centre-column{
background-color: #e67e22;
left: 33.33%;
border-color:#e67e22;
}
#right-column{
background-color: #c0392b;
left: 66.66%;
border-color:#c0392b;
}
div[id$="column"]{
width: 33.33%;
height: 100%;
position: absolute;
}
.columns{
background-color: #333;
width: 100%;
height: 100%;
position: absolute;
}
.columns:hover div{
/*
transition for animation in modern browsers
*/
transition: opacity linear .2s;
opacity:0.3;
}
div[id$="column"]:hover{
/*
transition for animation in modern browsers
*/
transition: border ease-out .1s,margin ease-out .1s,padding ease-out .1s;
z-index:200;
margin-left:-20px;
padding-left:20px;
border-right:solid 20px;
opacity:1;
}
I have used transition property w/out prefixes. You should go for the one that works for you. Check demo here: http://jsfiddle.net/pixshatterer/Zf6VU/

Here's how you can do it with just CSS: http://jsfiddle.net/4v3GE/5/
NOTE: I added a column container.
.column {
width: 33.33%;
height: 200px;
float: left;
-webkit-transition: width .2s ease-in-out;
-moz-transition: width .2s ease-in-out;
-o-transition: width .2s ease-in-out;
transition: width .2s ease-in-out;
}
.column--left{
background-color: #27ae60;
}
.column--center {
background-color: #e67e22;
}
.column--right {
background-color: #c0392b;
}
/* Hover styling */
.columns:hover .column {
width: 25%;
}
.columns .column:hover {
width: 50%;
}

How to make the direction nav constant on flexslider?

I want the little hover grey arrows to be display block and not animate when hovering over the thumbnail navigation. You can see the demo here. I have been wading through the javascript for the plugin and cannot for the life of me work out where it is animating the arrows. If I could, I would just comment out that code. So can anyone else?

This confused me for a little while, but it turns out the arrow animation isn't actually in the plugins javascript. It's in the CSS using -webkit-transition: all .3s ease;. If you look at the default CSS file and go to line 52 you need to remove the above out of .flex-direction-nav a. So the line should look like the below.
.flex-direction-nav a {
width: 30px;
height: 30px;
margin: -20px 0 0;
display: block;
background: url(images/bg_direction_nav.png) no-repeat 0 0;
position: absolute;
top: 50%;
z-index: 10;
cursor: pointer;
text-indent: -9999px;
opacity: 0;
}

I recently ran into this issue and solved it (with the help of this question/answer) by overriding the following styles:
.flex-direction-nav a {
...
-webkit-transition: all .3s ease;
-moz-transition: all .3s ease;
transition: all .3s ease;
}
with these styles in my own css:
.flexslider .flex-direction-nav a.flex-prev,
.flexslider .flex-direction-nav a.flex-next {
...
-moz-transition: none;
-webkit-transition: none;
transition: none;
}
I'm a big fan of not modifying source code provided by a library, so I think this is a better and more complete solution.

It is very simple, just change the following css code like this:
.flexslider .flex-direction-nav .flex-next {
right: 5px; /* adjust offset to match the hover style */
opacity: .8; /* adjust opacity to match the hover style */
}
.flexslider .flex-direction-nav .flex-prev {
left: 5px; /* adjust offset to match the hover style */
opacity: .8; /* adjust opacity to match the hover style */
}

Make your own arrows: disable directionNav and use manualControls.