Edit: this is an example of what I'm trying to do: http://codepen.io/anon/pen/OVzOjW
(Note that the menu and nav don't perfectly align, as the nav transition is being controlled by the CSS, and the menu delay is being controlled by the JS.)
I'm trying to create a slideout menu that fires some JS during the slide animation.
On page load, nav is fixed hidden to the right of the viewport and menu is fixed to the top right of the viewport. nav is wider than menu. On menu click fires the slideout animation of nav. I want to add a namespace class to nav that changes the CSS properties of menu. I want to do this the moment the visible portion of the nav becomes equal in width to the width of the menu, at which point the menu will just become part of the nav for the rest of the slideout.
I need to do this with some combination of CSS3 and vanilla JS (jQuery is unavailable). I can do the nav animation with CSS or JS easy enough, but timing the CSS property changes on menu is what I can't figure out.
I've tried to write a loop that constantly evaluates the right property value of nav to see if it's >= the width of menu (using CSS to do the transition), but that seems to fire the entire loop right away.
I'm not picky over a CSS vs JS solution for the animation itself, but I'd prefer CSS as I feel it's easier to control the transition settings and it runs smoother.
Relevant code below. Any help would be greatly appreciated!
HTML:
<nav id="nav">
<a id="menu" href="#">Menu</a>
Foo
Foo
Foo
</nav>
CSS:
#nav {
position: fixed;
right: -100px;
top: 0;
width: 100px;
}
#nav.expanded-nav {
right: 0;
}
#nav.expanded-menu #menu {
position: absolute;
right: auto;
top: auto;
width: 100%;
}
#menu {
position: fixed;
right: 0;
top: 0;
width: 50px;
}
You can do that with CSS animation chaining or animation-delay or simple setTimeout of Vanilla JavaScript
Check out the below code for CSS way..
$("#go").click(function() {
$(".container").addClass("demo");
});
.container {position: relative;}
#nav, #menu {
height: 100px;
width: 100px;
position: absolute;
}
#nav {
top: 10px;
left:-100px;
background: #000;
}
#menu {
top: 150px;
left:200px;
background: #f00;
}
.demo #nav {
-webkit-animation: demo 1s, demo1 2s;
-webkit-animation-delay: 0s, 1s;
-webkit-animation-timing-function: ease-in-out;
}
.demo #menu {
-webkit-animation: demo1 2s;
-webkit-animation-delay: 1s;
-webkit-animation-timing-function: ease-in-out;
}
#-webkit-keyframes demo {
0% {
left: -100px;
}
100% {
left: 200px;
}
}
#-webkit-keyframes demo1 {
0% {
left: 200px;
}
100% {
left: 300px;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="go">Go</button>
<div class="container">
<div id="nav"></div>
<div id="menu"></div>
</div>
This was actually way easier than I initially thought. It can actually rather easily be solved by setting a min-width on menu and allowing it to "grow" to the full length of the parent `nav' when it slides out. Demo here: http://codepen.io/anon/pen/EjobEJ
Related
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.
I've been trying doing it, but it doesn't work. It should move that image left 10px, but it doesn't. That div has left css inside it, I think it's because of that. I tried !important, but it didn't work.
Here's JSFiddle: https://jsfiddle.net/jwbvxhv0/1/
$(".seen").bind("webkitAnimationEnd mozAnimationEnd animationEnd", function(){
$(this).removeClass("animated")
})
$(".seen").hover(function(){
$(this).addClass("animated");
})
#-webkit-keyframes example {
0% {
left: 0px;
}
25% {
left: 10px ! important;
}
100% {
left: 0px;
}
}
.seen.animated {
position: relative;
-webkit-animation-name: example;
-webkit-animation-duration: 2s;
}
You can use translate transform for left/right movement as it does not affect any neighbour elements' position. To make the transition smooth, you need to add transition on transform property for your image.
Update:
If you have a button next to the img, which has higher z-index as you mentioned. You need to apply the same effect to a parent element that contains both - that image and that button.
.moving-left
{
height: 100px;
position: relative;
transition: transform 0.3s ease;
transform: translateX(0px);
width: 100px;
}
.moving-left:hover
{
transform: translateX(10px);
}
.moving-left button
{
left: 8px;
position: absolute;
top: 30px;
z-index: 99;
}
<div class="moving-left">
<img src="http://placehold.it/100X100" alt="" />
<button>Button here</button>
</div><!--.moving-left-->
I want to slide a menu bar from the left and at the same time slide the page to the right using CSS and jquery. I can do the sliding no problem but what is happening is the body slides left, then once that is complete the menu slides out
JS
$('body').toggleClass('slide-left', '');
$('.mid-side-menu').toggleClass('slide-out', '');
CSS
.slide-left {
position: fixed;
right: 300px;
transition: right 0.5s;
}
.slide-out {
transition: right 0.5s;
right: 0px;
}
How do I run the two commands at the same time?
I don't think you can accomplish what you want with your current implementation. You would need to add the same class to both items, but have the class act differently based on what it is applied to.
For example:
jQuery
$('.mid-side-menu, body').toggleClass('slide-out', '');
CSS
body.slide-out {
position: fixed;
right: 300px;
transition: right 0.5s;
}
.mid-side-menu.slide-out {
transition: right 0.5s;
right: 0px;
}
This is my Javascript function so far :
function changeImg (){
document.getElementById('main').style.backgroundImage = "url('./img/map/maphv.png')"
}
function changeBack () {
document.getElementById('main').style.backgroundImage = "url('./img/map/map.png')"
}
This is in the HTML :
<div id="main">
<a data-title="Africa" href="collection/africa.html" onmouseover="mouseoversound.playclip();changeImg()" onmouseout="changeBack()"><img class="africa" src="./img/map/africa.png" height="50"/> </a>
This is the CSS :
#main {
background-image: url(../img/map/map.png);
background-size: 100%;
background-repeat: no-repeat;
width: 100%;
height: 580px;
position: relative;
}
#main img.africa {
top: 244px;
left: 397px;
height: 33.5%;
position: absolute;
width: 18%;
opacity:0;
}
#main img.africa:hover {
top: 244px;
left: 397px;
height: 33.5%;
position: absolute;
width: 18%;
opacity:1;
transition: opacity .5s ease-in-out;
-moz-transition: opacity .5s ease-in-out;
-webkit-transition: opacity .5s ease-in-out;
}
So the CSS is quite irrelevant but I posted it so that you can see how the top hover is fading in and out. I just wanted to add the fade to the onmouseover event to the background map main element.
So really I just need to add the fade in the Javascript function and add that function to the mouseover event handler?
Any ideas as Javascript is not my first language.. ;)
If you can use jquery,then you can do something like
FIDDLE DEMO
$("#main").on("mouseenter", function () {
$(".africa").stop(true, true).fadeOut(); /***fadeIn or fadeOut***/
});
Ditch the Javascript
If i understand your question correctly, you want to fade between images when you hover over an element, right? This can easily be done in pure CSS.
Give the element you want to animate a background image
Add a child element that's the same size as the parent. This can be an <img>, or a span or div with a background image
Set the opacity for the child element to 0, unless someone hovers over the parent element.
HTML
<div class="fading-bg">
<img src="foo/bar.jpg" alt="stuff">
</div>
CSS
.fading-bg{
position:relative;
width: 100px;
height: 100px;
background: no-repeat center;
background-size: cover;
}
.fading-bg img{
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
opacity: 0;
-webkit-transition: opacity 500ms;
transition: opacity 500ms;
}
.fading-bg:hover img{
opacity: 1;
}
Javascript is awesome, but in my personal opinion you should avoid using it for simple animations like this, as CSS is more than capable of doing it on its own.
I am wanting to be able to slide a div out (to the left), while sliding another div in (from the right) at the same time.
My HTML code is like this:
<body>
<div id="content">
<div id="page1">
<!-- Content Area 1 -->
</div>
<div id="page2">
<!-- Content Area 1 -->
</div>
</div>
</body>
Currently I am using
document.getElementById('page1').style.display = "none";
document.getElementById('page2').style.display = "inline";
to switch between the pages, but I would like to have the transition as smooth as possible.
Is there a way I can do this, without jQuery and preferably just in CSS?
If not, how can I do it in jQuery?
Yes you can do it with pure css by using animation keyframes.
HTML
<div id="content">
<div id="page1" class="page">
<!-- Content Area 1 -->
</div>
<div id="page2" class="page">
<!-- Content Area 1 -->
</div>
</div>
CSS
html,body {
height: 100%;
overflow: hidden;
}
#content {
position: relative;
height: 100%;
}
.page {
position: absolute;
top:0;
height: 100%;
width: 100%;
}
#page1 {
background: #d94e4e;
left:-100%;
-webkit-animation: left-to-right 5s linear forwards;
animation: left-to-right 5s linear forwards;
}
#page2 {
background: #60b044;
left:0;
-webkit-animation: right-to-left 5s linear forwards;
animation: right-to-left 5s linear forwards;
}
#-webkit-keyframes left-to-right{
from{left:-100%}
to{left:0}
}
#-webkit-keyframes right-to-left{
from{left:0}
to{left:100%}
}
#keyframes left-to-right{
from{left:-100%}
to{left:0}
}
#keyframes right-to-left{
from{left:0}
to{left:100%}
}
However there is one huge limitation to this method. CSS can't handle any real events. So if you want this animation to appear when a button is clicked or something, you'll have to use JavaScript.
Demo jsFiddle
Edited
Now the left one enters and the right one exits at the same time.
UPDATE
The same example using translate3d => jsFiddle
here's an (almost) full CSS solution:
If you can be more specific about what you want I can happily tweak or guide you through the code to help you.
It relies on using translate3d:
transform: translate3d(-200px, 0, 0);
DEMO
using jQuery
http://jsfiddle.net/5EsQk/
<div id="content">
<div id="page1" style="width: 100px; height: 100px; color: white; background-color:silver; float: left; margin-left: -90px;">
Content Area 1
</div>
<div id="page2" style="width: 100px; height: 100px; color: white; background-color:silver; float: right; margin-right: -90px;">
Content Area 1
</div>
</div>
$(document).ready(function() {
$('#page1').animate({
marginLeft: "+=90"
}, 5000);
$('#page2').animate({
marginRight: "+=90"
}, 5000);
});
edited fiddle => http://jsfiddle.net/5EsQk/1/
Very much possible without jQuery, using only CSS and CSS transitions.
You can set up your CSS so that if <div id="content"> has no class .showPage2, it shows page 1. If it does have .showPage2, it shows page 2.
The transition is then only triggered by toggling the class using (native) Javascript. The animation is handled by CSS transitions. This means that if by any change the browser does not support CSS3 transitions, the user will still see the correct page; only not with the fancy transition. CSS3 transitions are generally very smooth.
This is what the CSS would look like:
#content
{
position: relative;
overflow: hidden;
}
#content #page1
{
position: absolute;
left: 0%;
width: 100%;
height: 100%;
transition: left .5s ease-out;
-webkit-transition: left .5s ease-out;
}
#content #page2
{
position: absolute;
left: 100%;
width: 100%;
height: 100%;
transition: left .5s ease-out;
-webkit-transition: left .5s ease-out;
}
#content.showPage2 #page1
{
left: -100%;
}
#content.showPage2 #page2
{
left: 0%;
}
And the Javascript could look something like this:
function showPage1()
{
document.getElementById("content").setAttribute("class", "")
}
function showPage2()
{
document.getElementById("content").setAttribute("class", "showPage2")
}
I hope this handles it in a way that fits your needs.