Develop Reference

css animation on sidebar close

In this stackblitz, I am not able to add animation while closing, I tried it using transform, but it didnt seem to work
HTML
Blocker is used to covering the full screen in a half-transparent mode in mobile devices
const sidebar = document.querySelector('.sidebar');
sidebar.querySelector('.blocker').onclick = hide;
function show() { // swipe right
sidebar.classList.add('visible');
document.body.style.overflow = 'hidden';
}
function hide() { // by blocker click, swipe left, or url change
sidebar.classList.remove('visible');
document.body.style.overflow = '';
}
function toggle() {
sidebar.classList.contains('visible') ? hide() : show();
}
.sidebar {
/* it's a mobile sidebar, blocker and content */
position: fixed;
top: 0;
left: 0;
width: 100vw;
/* to cover the whole screen */
height: 100vh;
padding: 0;
/* to override the default padding */
background: rgba(0, 0, 0, .5);
/* half transparent background */
display: none;
z-index: 99999;
/* to be on top of any other elements */
}
.sidebar.visible {
display: block;
}
/*cover the whole screen and to detect user click on background */
.sidebar .blocker {
position: absolute;
width: 100%;
height: 100%;
}
/* user content */
.sidebar .content {
position: absolute;
top: 0;
left: 0;
background: #FFF;
height: 100%;
width: 250px;
left: -50%;
/* will be animated to left: 0, by animation */
animation: slide 0.5s forwards;
}
#keyframes slide {
100% {
left: 0;
}
}
<div class="sidebar">
<div class="blocker"></div>
<div class="content">
Sidebar Content
</div>
</div>
With the above code, you can have a working sidebar.
Check the working code from stackblitz
https://allenhwkim.medium.com/mobile-friendly-sidebar-in-few-minutes-7817b5c5239f
https://stackblitz.com/edit/medium-sidebar-1-eevvax?file=style.css,index.js

You can't animate between display:block (when .sidebar has .visible applied to it) and display:none (when .visible is removed from .sidebar).
display:none turns off the display of an element so that it has no effect on layout (the document is rendered as though the element did not exist). All descendant elements (i.e. .blocker and .content) also have their display turned off.
The reason you get an animation upon adding .visible is that .sidebar now "exists" and so .sidebar-content also exists and as such animates. As soon as you remove .visible, .sidebar ceases to exist again and so it and its descendants disappear instantaneously.
You are along the right lines using transforms but you need to remove display:none as the method for hiding the sidebar. Something like the below is a good starting point. You may need to change some values to get it looking exactly as you wish. I have added a working codepen to show the result.
.sidebar {
position: fixed;
top: 0;
left: 0;
width: 100vw;
height: 100vh;
padding: 0;
background: rgba(0, 0, 0, .5);
z-index: 99999;
transform: translateX(-100%); // new property - will move the element off the left hand side of the screen
transition: transform .5s ease-in-out; // new property - will make the sidebar slide in in a similar manner to your animation
}
.sidebar.visible {
transform: translateX(0); // new property - makes sidebar sit in its natural position (i.e. taking up the whole viewport)
}
.sidebar .blocker {
position: absolute;
width: 100%;
height: 100%;
}
.sidebar .content {
position: absolute;
top: 0;
left: 0;
background: #FFF;
height: 100%;
width: 250px;
}

Why my transition doesn't work on bootstrap nav?

Why my class toggle is strict without any transition effect even though I added transition: 0.5s? It doesn't work on my bootstrap website. Whenever I try to test it on custom div on jsfiddle site then it works fine.
https://jsfiddle.net/dawid1798/5goyjwx0/3/
window.addEventListener('scroll', function() {
var header = document.getElementById("navbar");
header.classList.toggle("fixednav", window.scrollY > 100);
});
.fixednav {
transition: 0.5s;
position: fixed;
top: 0;
right: 0;
left: 0;
z-index: 9999;
}

When nav loses class .fixednav it also loses the transition property.
Put it on .nav:
.nav {
width: 100%;
height: 250px;
background: red;
transition: 0.5s;
}
Also check if bootstrap is loaded into the project and that you aren't disabling the transition with your css.

How does photoswipe apply styles to blur image when you click on share button?

You can see example here: http://codepen.io/dimsemenov/pen/gbadPv
Click on Share button and you'll see it blurs the image (and everything else).
I am observing this in inspector and I can't figure it out.
I have downloaded source code and it set a watch in photoswipe-ui-defaults.js in this last line:
_openWindowPopup = function(e) {
e = e || window.event;
var target = e.target || e.srcElement;
pswp.shout('shareLinkClick', e, target);
It never gets executed.
I have added other similar modal and I want to achieve same effect, but I can't figure out what is being done to achieve that blur.

Well, it would looks partly complicated that's why it isn't clear for the first look.
There all time rendered .pswp_share-modal with this css
Share Modal:
.pswp_share-modal {
display: block;
background: rgba(0,0,0,0.5);
width: 100%;
height: 100%;
top: 0;
left: 0;
padding: 10px;
position: absolute;
z-index: 1600;
opacity: 0;
-webkit-transition: opacity .25s ease-out;
transition: opacity .25s ease-out;
-webkit-backface-visibility: hidden;
will-change: opacity;
}
When you click to the "share" button somewhere in js .pswp__share-modal--fade-in class attaches to the same element with this css:
Modal with fade in effect:
.pswp__share-modal--fade-in {
opacity: 1
}
As you can see the general idea is to turn opacity to 100% when share modal is active. Blur effect is exist cause actual modal background has rgba(0,0,0,0.5);

What you have to do is add an extra div, make it full screen, and then add a background to the div. I have an example here (it looks ugly but you'll catch what I'm trying to say).
$(document).ready(function() {
$('#modal-btn').click(function(){
$('.modal').css("display","block");
});
$('.modal').click(function(){
$(this).css("display","none");
});
});
html, body {
background-color: #000;
color: #fff;
height: 100%;
width: 100%;
z-index: 1;
}
.modal {
background-color: #000;
background-color: rgba(0, 0, 0, 0.5);
display: none;
height: 100vh;
position: absolute;
top: 0;
left: 0;
width: 100vw;
z-index: 2;
}
.modal-content {
background-color: #aaa;
height: 50%;
margin: 10px auto;
text-align: center;
width: 50%;
z-index: 3;
}
<html>
<head></head>
<body>
<!-- Page content -->
<div>
The content that goes in the background.
<button id="modal-btn" class="btn">Open Modal</button>
</div>
<!-- Modal -->
<div class="modal">
<div class="modal-content">The Modal Content</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
</body>
</html>

make div bigger and animate bigger section upwards on hover

I am trying to animate a div upwards when a user hovers on the div.
I am able to animate the div making it bigger, however the animation happens downwards. I am trying to keep the bottom of the div remain in the same place, and have a smooth animating increasing the size of the div upwards.
See jsfiddle here which demonstrates what my code is currently doing.
Please see code below:
.box {
height: 170px;
padding-bottom: 15px;
width: 50%;
}
.content {
background-color: #e3e4e6;
height: 100%;
text-align: center;
}
.content:hover {
height: 110%;
}
<div class="box">
<div class="content">TEST</div>
</div>

You can do this using transform:scaleY() and set the transform-origin to bottom. I also put a margin-top:100px to see the effect better. Also you can use transition to make the scale smoother
You also need to scale back the text.
See here: jsfiddle
You need to scale the text back to it's original state in the same time that you scale the div. so if you scale the div 2 times. You need to scale back the text with 1/2 , same if you scale 3 times...scale back with 1/3
In this case you enlarge .content by 1.5 so you need to scale down the text inside by 1/1.5 = 0.66
Code:
.box {
height: 170px;
padding-bottom: 15px;
width: 50%;
}
.content {
background-color: #e3e4e6;
height: 100%;
text-align: center;
margin-top: 300px;
transition:0.3s;
}
.content:hover p {
transform: scaleY(0.66)
}
.content:hover {
transform: scaleY(1.5);
transform-origin: bottom;
}
<div class="box">
<div class="content">
<p>
TEST
</p>
</div>
</div>

Try it like this (I have no other idea...): You can give to the class "box" a bigger height (I put a red border around, so you can see it) than the class "content". After that, you can use flexbox, to put the class "content" on the bottom. After that, you can do it with hover to change your heigth upwards and fill it. With transition you can make a nice animation. I hope this is good enough. Perhaps there is also a way with jQUery at the moment I havn't got an idea. Let me know, if this helps you (I'm not sure if I understanded the question well) - Cheers. (Important: This heights and so on are just random values for testing)
.box {
display: flex;
justify-content: flex-end;
flex-direction: column;
height: 100px;
border: 1px solid red;
}
.content {
background-color: #e3e4e6;
height: 50px;
width: 100%;
text-align: center;
-webkit-transition: height 1s;
/* Safari */
transition: height 1s;
}
.content:hover {
height: 100%;
}
<div class="box">
<div class="content">TEST</div>
</div>

If you just want to use css, just use:
.content:hover {
margin-top: -50px;
height: 110%;
}
See jsFiddle

since there isn't any space at top to expand, you may give an extra margin initially and remove it on hover like this JsFiddle -
.box {
height: 170px;
padding-bottom: 15px;
width: 50%;
}
.content {
background-color: #e3e4e6;
height: 100%;
text-align: center;
margin-top:25px;
}
.content:hover {
height: 110%;
margin-top:0;
}

Set top property with the value of height - 100 * -1
https://jsfiddle.net/x3cL1cpt/7/
.content:hover {
height: 110%;
top: -10%;
position: relative;
}
Why position relative? It's because I move the box, but without modifying the space that the box occuped. If you need to modify that space, change top with margin-top.

Replace this CSS with your current, needed to add transition:
.box {
height: 170px;
padding-bottom: 15px;
width: 50%;
}
.content {
background-color: #e3e4e6;
height: 100%;
text-align: center;
transition: 1s all ease;
}
.content:hover {
transform: scaleY(1.2);
transform-origin: bottom right;
}

Javascript Side Content keep appearing after Toggle the Style

I'm trying to create a Side menu for my responsive website. I'm not that good with JavaScript but it is working! (so far)
My problem is that, I'm toggling the <nav> class to make it appear and dissapear from the left side. The button to click is outside the <nav> content and the button to close is a simple text inside the <nav> content.
So, my HTML looks like this:
<nav id="nav-slide" class="nav-slide">
Side Content <br>
Close
</nav>
That's the nav that I'm trying to Toggle. The button to open should be this image:
<img id="menu-icon" src="images/menu-icon.svg"/>
CSS:
.nav-slide {
position: fixed;
left: 0;
top: 0;
height: 100%;
width: 100%;
max-width: 100%;
background-color: #3f3f3f;
z-index: 99;
box-sizing: border-box;
padding: 20px;
color:#fff;
margin-left: -100%;
transition: margin 200ms ease-in-out;
}
.nav-open {
margin-left: 0px;
transition: margin 200ms ease-in-out;
}
and my JAVASCRIPT:
$("#menu-icon").click(function(){
$("#nav-slide").toggleClass("nav-open");
});
$("#close-button").click(function(){
$("#nav-slide").toggleClass("nav-slide");
});
Is working so far! But when I click on Close text, and after closing the <nav> it keeps displaying <nav> content like this image:
Image with example of problem
Any way to solve this?

JQuerys toggleClass does add a new class to an item. If it already has that class, it will remove it from that item. So while your nav's base class is nav-slide, toggle nav-open only (not both). Here's a slightly different, basic example of an animated side-nav:
$('button').on('click', function (e) {
$('.menu').toggleClass('open');
});
html, body {
width: 100%;
height: 100%;
margin: 0;
}
.menu {
position: fixed;
top: 0;
left: 0;
height: 100%;
width: 20%;
background-color: tomato;
transform: translate(-100%, 0);
transition: transform 1s;
}
.menu.open {
transform: translate(0, 0);
}
<script src="https://code.jquery.com/jquery-2.2.0.min.js"></script>
<button>menu</button>
<div class="menu">
<button>close</button>
</div>
Edit: Here is a pen of your example:
http://codepen.io/wilmaknattern/pen/xZXMaW