I have a left menu that slides in when the user clicks on the hamburger. Behind it is an overlay with the following SCSS:
.overlay {
background-color: $glb-nav-80-opacity-white;
position: fixed;
left: 0;
right: 0;
top: 0;
bottom: 0;
z-index: 200;
cursor: pointer;
}
.left-menu {
background: $glb-nav-dark-blue;
position: fixed;
overflow-x: hidden;
overflow-y: auto;
margin: 0;
padding: 0;
-webkit-transition: all 0.3s ease;
-moz-transition: all 0.3s ease;
transition: all 0.3s ease;
a:hover {
color: $glb-nav-white;
}
}
When people click on the hamburger menu, the overlay shows up abruptly. I need it to fade in. How can I do that using CSS?
Here's the HTML:
<div class="overlay"></div>
<div class="left-menu"></div>
When the user opens the page the left-menu has a left position of -284px. Then when people click on the hamburger icon, I add a class to the div that sets its left position to 0.
Instead of adding a class, you can set the opacity using jQuery's .CSS
For example:
$(".overlay").css({opacity:50});
To reset it, use
$(".overlay").removeAttr("style");
Use CSS transitions as you did for the menu:
.overlay {
background-color: $glb-nav-80-opacity-white;
position: fixed;
left: 0;
right: 0;
top: 0;
bottom: 0;
z-index: 200;
cursor: pointer;
-webkit-transition: all 0.3s ease;
-moz-transition: all 0.3s ease;
transition: all 0.3s ease;
}
Use css transitions as you did with the menu, ie:
.overlay {
// other css
-webkit-transition: opacity 500ms ease;
-moz-transition: opacity 500ms ease;
-o-transition: opacity 500ms ease;
transition: opacity 500ms ease;
}
Or, if using SASS: #include transition(opacity 500ms ease);
Note, you can set the timing and style to be what you like, more here: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Transitions/Using_CSS_transitions
just add transition to the overlayed div
div {
/* -transition: 2 seconds- */
-webkit-transition: width 2s; /* For Safari 3.1 to 6.0 */
transition: 2s;
}
div:hover {
height: 200px;
background: red;
}
<div>transition on hover</div>
Related
My mega menu nav has a hovering issue. It activates when hovering over invisible child list items (mousing over from bottom to top, you'll notice the issue on this codepen).
This is the block of CSS that's triggering the hover:
.nav:hover > li > .subnav-block {
opacity: 1;
visibility: visible;
overflow: visible;
}
I'm thinking a JavaScript solution would help out but trying to find CSS fix for this first.
Your sub-navigation menu is taking up space, even though it is not visible. That is why you can see it whenever you are hovering above it. Adding height:0 to your .subnav-block and then setting it back to auto when hovering, should do the trick. Your css should look something like the one below.
.subnav-block {
position: static;
display: block;
width: 100% !important;
top: 54px;
left: 0;
height: 0;
overflow: hidden;
background: gray;
-webkit-transition: all 0.3s ease 0.15s;
-moz-transition: all 0.3s ease 0.15s;
-o-transition: all 0.3s ease 0.15s;
-ms-transition: all 0.3s ease 0.15s;
transition: all 0.3s ease 0.15s;
}
.nav:hover > li > .subnav-block {
height: auto;
visibility: visible;
overflow: visible;
}
UPDATE
If you want to add paddings to your sub-navigation menu, setting the height to 0 won't suffice, and you would need to change both the height and the padding when hovering. There is another way, which Hadi77 mentioned, which is setting the default display to none and then change it to block. Just like the example below.
.subnav-block {
position: static;
width: 100% !important;
top: 54px;
left: 0;
display: none;
background: gray;
-webkit-transition: all 0.3s ease 0.15s;
-moz-transition: all 0.3s ease 0.15s;
-o-transition: all 0.3s ease 0.15s;
-ms-transition: all 0.3s ease 0.15s;
transition: all 0.3s ease 0.15s;
}
.nav:hover > li > .subnav-block {
display: block;
}
UPDATE 2
Since display won't let us use transitions, the other workaround would be using a bit of JS. Since it is not much code, it is solid way to achieve this. We would need to remove the CSS hover in this.
JS
const nav = document.querySelectorAll('.nav > li');
nav.forEach(elem => {
elem.addEventListener('mouseenter', () => {
const subnav = document.querySelectorAll('.subnav-block');
subnav.forEach(sub => {
sub.classList.add('display-block');
setTimeout( () => {
sub.style.opacity = 1;
sub.style.height = 'auto';
}, 100);
});
});
elem.addEventListener('mouseleave', () => {
const subnav = document.querySelectorAll('.subnav-block');
subnav.forEach(sub => {
sub.classList.remove('display-block');
sub.style.opacity = 0;
});
});
});
CSS
.subnav-block {
position: static;
width: 100% !important;
top: 54px;
left: 0;
display: none;
opacity: 0;
height: 0;
background: gray;
-webkit-transition: all 0.3s ease 0.15s;
-moz-transition: all 0.3s ease 0.15s;
-o-transition: all 0.3s ease 0.15s;
-ms-transition: all 0.3s ease 0.15s;
transition: all 0.3s ease 0.15s;
}
.display-block {
display: block;
}
Setting visibility to hidden, is somewhat like making it transparent: The element takes space as it should (display is set to block).
Using display property is what you want. Set it to none when you want the element to be "not displayed" and set it to block to "display it".
Also if you don't want all menus to drop-down together, move the :hover pseudo-selector in .nav:hover > li > .subnav-block to li, so it would become .nav > li:hover > .subnav-block.
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I have the following code which applies .upper class to #top-btn and it appears at the bottom when the user scrolls down by a certain amount and removes it when they scroll back up. It animates #top-btn from the bottom of the page.
However when the class is removed while scrolling up, I want it to animate back down. The way I have it it just blinks away (because the class upper is just removed).
jQuery(document).ready(function($){
// adjust this number to select when your button appears on scroll-down
var offset = 300,
scroll_top_duration = 3000,
// bind with the button link
$animation = $('#top-btn');
// apply animation
$(window).scroll(function(){
( $(this).scrollTop() > offset ) ? $animation.addClass('upper') :
$animation.removeClass('upper');
});
});
body,html{
width:100%;
position:relative;
height:100%;
}
body{
background-color:green;
height:4000px;
}
#top-btn {
position: fixed;
z-index: 999;
padding: 0; margin: 0;
bottom: -100px; right: 0;
}
#top-btn.upper {
bottom: 0;
-webkit-transition: bottom 0.35s ease;
-moz-transition: bottom 0.35s ease;
-ms-transition: bottom 0.35s ease;
-o-transition: bottom 0.35s ease;
transition: bottom 0.35s ease;
}
#top-btn-BG {
display: block;
position: relative;
z-index: 950;
border-width: 0 0 100px 100px;
border-color: transparent transparent #fff transparent;
border-style: solid;
right: 0; bottom: 0;
width: 0; height: 0;
-webkit-transform:rotate(360deg);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="top-btn">Button</button>
Instead of removing .upper you should add a class .lower which will have bottom:-30px;. If you don't know height of the button then you can set it from jquery.
Then your jquery will become like this:
( $(this).scrollTop() > offset ) ?
$animation.addClass('upper').removeClass("lower"):
$animation.addClass('lower').removeClass("upper");
jQuery(document).ready(function($){
// adjust this number to select when your button appears on scroll-down
var offset = 300,
scroll_top_duration = 3000,
// bind with the button link
$animation = $('#top-btn');
// apply animation
$(window).scroll(function(){
( $(this).scrollTop() > offset ) ? $animation.addClass('upper').removeClass("lower"):
$animation.addClass('lower').removeClass("upper");
});
});
body,html{
width:100%;
position:relative;
height:100%;
}
body{
background-color:green;
height:4000px;
}
#top-btn {
position: fixed;
z-index: 999;
padding: 0; margin: 0;
bottom: -100px; right: 0;
}
#top-btn.upper {
bottom: 0;
-webkit-transition: bottom 0.35s ease;
-moz-transition: bottom 0.35s ease;
-ms-transition: bottom 0.35s ease;
-o-transition: bottom 0.35s ease;
transition: bottom 0.35s ease;
}
#top-btn.lower {
bottom:-30px;
-webkit-transition: bottom 0.35s ease;
-moz-transition: bottom 0.35s ease;
-ms-transition: bottom 0.35s ease;
-o-transition: bottom 0.35s ease;
transition: bottom 0.35s ease;
}
#top-btn-BG {
display: block;
position: relative;
z-index: 950;
border-width: 0 0 100px 100px;
border-color: transparent transparent #fff transparent;
border-style: solid;
right: 0; bottom: 0;
width: 0; height: 0;
-webkit-transform:rotate(360deg);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="top-btn">Button</button>
You can call a function in conditional operator for removing the class and scroll the page down. something like this:
( $(this).scrollTop() > offset ) ? $animation.addClass('upper') :
scrollDown();
function scrollDown(){
$('#top-btn').removeClass('upper');
//here goes the code to scroll down//;
}
I am trying to achieve the effect shown here:
https://css-tricks.com/almanac/properties/t/transition/
Where the color changes when the user hovers over the element. But I want this to occur overtop a background image I set and for the animation to reverse when the user moves their cursor away from the element.
An example of which can be found here:
http://thefoxwp.com/portfolio-packery-4-columns/
I can get the transition part working with:
.box {
width: 150px;
height: 150px;
background: blue;
<!--background-image: url("http://lorempixel.com/380/222/nature");-->
margin-top: 20px;
margin-left: auto;
margin-right: auto;
-webkit-transition: background-color 2s ease-out;
-moz-transition: background-color 2s ease-out;
-o-transition: background-color 2s ease-out;
transition: background-color 2s ease-out;
}
.box:hover {
background-color: black;
cursor: pointer;
}
<div class="box"></div>
But I am having trouble achieving it with a background image and making the white animation transparent over top of it.
The better way to do it would be to use an overlay over the image and apply transition on its opacity.
See this FIDDLE
Use a wrapper div for both .box and .overlay. Since we want overlay to placed exactly top of the box, we absolute positioned overlay on the top of box.
<div class="wrapper">
<div class="box">
</div>
<div class="overlay">
</div>
</div>
You Css
.wrapper {
position: relative;
width: 150px;
height: 150px;
margin-top: 20px;
margin-left: auto;
margin-right: auto;
}
.box {
position: absolute;
//background: blue;
width: 100%;
height: 100%;
background-image: url("http://lorempixel.com/380/222/nature");
}
.overlay {
position: absolute;
z-index: 1;
opacity: 0;
width: 100%;
height: 100%;
background: white;
-webkit-transition: opacity 2s ease-out;
-moz-transition: opacity 2s ease-out;
-o-transition: opacity 2s ease-out;
transition: opacity 2s ease-out;
}
.overlay:hover {
opacity: 0.7;
}
You can add background-image:none on .box:hover. It will remove the background-image and you can get the background-color work. As soon as, you move out of the div.box, image will appear again.
.box {
width: 150px;
height: 150px;
background-image: url("http://lorempixel.com/380/222/nature");
margin-top: 20px;
margin-left: auto;
margin-right: auto;
-webkit-transition: background-color 2s ease-out;
-moz-transition: background-color 2s ease-out;
-o-transition: background-color 2s ease-out;
transition: background-color 2s ease-out;
}
.box:hover {
background-color: black;
cursor: pointer;
background-image:none;
}
<div class="box"></div>
the problem is that background and background-image cannot both exist at the same time. try using nested div tags: one with the background color nested inside the background-image.
My page has a text form in the middle. The aim is to use css opacity transitions to switch background images by fading. (I'll be switching background images quite often)
Currently got it working nicely by using two layers of background images. To display a new image at the bottom layer, we fade out the top layer (opacity 1 to 0). To display a new image at the top layer, we fade in the top layer (opacity 0 to 1).
The problem is that my text form fades along with the top layer - which I want it to stay visible. How do I make it unaffected by the fading?
Attempts to solve this:
Setting z-index of either #searchForm input or .formDiv to 999999, thinking that this will put the form right at the top of the hierachy so it would be unaffected by transitions below. However, didn't work.
Setting position of #searchForm input or .formDiv to absolute. From http://www.w3schools.com/css/css_positioning.asp,
"Absolutely positioned elements are removed from the normal flow. The document and other elements behave like the absolutely positioned element does not exist."
This stackoverflow post CSS3 Alternating table rows opacity affects text as well as background says that child elements are affected by opacity too. I tried placing the div containing the background images inside the formDiv class so that it wouldn't be a child. But this will get the form covered by the top image, even without opacity on.
function changeBackground(newUrl) {
//check which layer is currently activated
if ($('#background-image-top').hasClass('transparent')) {
//place new image over top layer
$('#background-image-top').css('background-image', 'url(' + newUrl + ')');
//fade in new image
$('#background-image-top').toggleClass('transparent');
} else {
//place new image over bottom layer
$('#background-image-bot').css('background-image', 'url(' + newUrl + ')');
//fade out old image
$('#background-image-top').toggleClass('transparent');
}
}
#background-image-top {
background-image: url("../images/default.jpg");
background-repeat: no-repeat;
background-position: center center;
background-size: cover;
-webkit-background-size:cover;
-moz-background-size:cover;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out; }
#background-image-bot {
background-repeat: no-repeat;
background-position: center center;
background-size: cover;
-webkit-background-size:cover;
-moz-background-size:cover;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;}
.transparent {
opacity: 0.25;}
.formDiv {
background-color: red;
max-width: 500px;
height: 50px;
margin-left: auto;
margin-right: auto;
margin-top: 35%;}
#searchForm input {
width: 300px;
height: 30px;
font-size: 18px;}
I have made a little fiddle where you might can get inspiration, i just use a class to toggle the opacity and them put under the form with position absolute, hope it helps :)
and then use a click function with jQuery to toggle the effect.
the css:
form {
position: relative;
z-index: 10;
}
#background1 {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: lightblue;
-webkit-transition: all 0.5s ease-in-out;
-moz-transition: all 0.5s ease-in-out;
-ms-transition: all 0.5s ease-in-out;
-o-transition: all 0.5s ease-in-out;
transition: all 0.5s ease-in-out;
}
#background2 {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: lightgreen;
-webkit-transition: all 0.5s ease-in-out;
-moz-transition: all 0.5s ease-in-out;
-ms-transition: all 0.5s ease-in-out;
-o-transition: all 0.5s ease-in-out;
transition: all 0.5s ease-in-out;
}
.hide {
opacity: 0;
}
http://jsfiddle.net/9jb68w2o/
+++ If you feel better to use css opacity transitions to switch background images by using only one div ie) #background1, you can use this code
$(document).ready(function() {
$('#toggle').click(function(e) {
e.preventDefault();
$('#background1').toggleClass('color1');
});
});
body {
background-color: #f8f8f8;
color: #555;
}.container {
position: relative;
margin: 30px auto;
padding: 20px;
width: 200px;
height: 150px;
background-color: #fff
}
form {
position: relative;
z-index: 10;
}
input[type=text] {
margin: 10px 0;
padding: 5px;
width: calc(100% - 10px);
font-size: 15px;
outline: none;
}
input[type=submit] {
width: 100%;
text-transform: uppercase;
font-size: 15px;
background-color: #333;
color: #fff;
border: none;
cursor: pointer;
}
#background1 {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: lightblue;
-webkit-transition: all 0.5s ease-in-out;
-moz-transition: all 0.5s ease-in-out;
-ms-transition: all 0.5s ease-in-out;
-o-transition: all 0.5s ease-in-out;
transition: all 0.5s ease-in-out;
}
#background1.color1 {
background-color: lightgreen;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<div class="container">
<div id="background1"></div>
<form>
<h2>Awesome form!</h2>
<input type="text" placeholder="Some text here" />
<input id="toggle" type="submit" value="Change now!" />
</form>`enter code here`
</div>
I dont have any idea how to make it work
Css:
.name
{
width: 270px;
height: 77px;
position: absolute;
top: 0px;
left: 600px;
-webkit-transition: top 0.3s;
-moz-transition: top 0.3s;
-o-transition: top 0.3s;
}
.name:hover
{
top: 10px;
-webkit-transition: top 0.3s;
-moz-transition: top 0.3s;
-o-transition: top 0.3s;
font-size: 24px;
}
.photo
{
width: 270px;
height: 310px;
position: absolute;
top: 77px;
left: 600px;
-webkit-transition: top 0.3s;
-moz-transition: top 0.3s;
-o-transition: top 0.3s;
}
.photo:hover,
{
top: 100px;
-webkit-transition: top 0.3s;
-moz-transition: top 0.3s;
-o-transition: top 0.3s;
font-size: 24px;
}
I want when i hold the mouse over the .name which is an image to activate the .photo hover effect and vice versa, any idea?
/* What you want the thing being hovered over to look like */
.name:hover {
top: 10px;
-webkit-transition: top 0.3s;
-moz-transition: top 0.3s;
-o-transition: top 0.3s;
font-size: 24px;
}
/* What you want the thing being hovered over to look like */
.name:hover ~ * {
/* Some styles */
}
In order for this to work, the items that you want to style need to be siblings of the .name element being hovered over. The ~ is a css sibling selector.
I would make a class like
.photo:hover, .photo.hover {
/* CSS */
}
Then toggle class hover on the photo element.
This woul be a javascript solution, not just CSS.
You can try this:
JS
$('.name').hover(function () {
$('.photo').addClass('hover');
}, function () {
$('.photo').removeClass('hover');
});
$('.photo').hover(function () {
$('.name').addClass('hover');
}, function () {
$('.name').removeClass('hover');
});
CSS
.name:hover, .name.hover
.photo:hover, .photo.hover
demo