text flickers on changing opacity on hover - css

I am trying to do something very simple, a para has opacity set to 0, when hovered on parent div the para's opacity changes to 1, there is a change of text happening after the opacity changes, it's not exactly flickering, the text kinda self adjusts itself which is a bit odd.
Here's the fiddle:
http://jsfiddle.net/krish7878/7t6GM/
HTML Code:
<div class="para">
<p> SOME SAMPLE TEXT </p>
</div>
CSS Code:
.para{
width: 1000px;
border: 1px solid #000;
}
.para p{
font-family: Arial, sans-serif;
font-size: 80px;
opacity: 0;
}
.para:hover p{
opacity: 1;
transition: all 400ms ease;
-moz-transition: all 400ms ease;
-webkit-transition: all 400ms ease;
-o-transition: all 400ms ease;
-ms-transition: all 400ms ease;
}


The solution is to change the backface-visibility property value to hidden.
The default value is visible.
Updated Example
.para p {
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
font-family: Arial, sans-serif;
font-size: 80px;
opacity: 0;
}

Related

How to apply transform and transition effect on a div

I was practicing css on an example i found. I tried to show the submenu above the nav with transition effects. I can change the position of the submenu on hover :
nav li:hover .menu-sub {
display: block;
transform: translateY(-100%);
}
I also modified the code to add a transition effect:
.menu-sub {
position: absolute;
left: 0;
background: #444;
width: 100%;
display: none;
color: #fff;
padding: 2em;
-webkit-transition: -webkit-transform 1.5s ease;
-moz-transition: -moz-transform 1.5s ease;
-o-transition: -o-transform 1.5s ease;
transition: transform 1.5s ease;
}
The position changed but I don't see any transition effect at all. What am i doing wrong ?

Please modify the transition to shown below, it was written wrong.
.menu-sub {
position: absolute;
left: 0;
background: #444;
width: 100%;
opacity:0;
overflow:hidden;
box-sizing:border-box;
height:0px;
color: #fff;
-webkit-transition: opacity 1.5s ease-out;
-moz-transition: opacity 1.5s ease-out;
-o-transition: opacity 1.5s ease-out;
transition: opacity 1.5s ease-out;
}
Transition does not work with display, instead use the below effect.
Codepen Demo
Where we can toggle the height from 0px to auto(full height) and opacity from 0(invisible) to 1(visible). You can see that we only see the animation on opacity, this will produce the best effect.

Use visibility:hidden then visible
display: none disables it in the active DOM and such elements with this CSS can't be selected for stuffs like animations.
.menu-sub {
position: absolute;
left: 0;
background: #444;
width: 100%;
visibility: hidden;
color: #fff;
padding: 2em;
transition: transform 1.5s ease;
}
nav li:hover .menu-sub {
visibility: visible;
transform: translateY(-100%);
}

How to make a div adjusted to the content height in Pure Css Map?

I'm trying to customise Pure Css Map
html {
background: #1a1a1a;
color: #e5e5e5;
text-align: center;
font-family: "Roboto", Helvetica, sans-serif;
}
body {
max-width: 1200px;
margin: 20px auto;
padding: 0 100px;
overflow-x: hidden;
}
.description {
max-width: 600px;
margin: 0 auto;
color: rgba(229, 229, 229, 0.7);
}
div, img, footer {
position: relative;
box-sizing: border-box;
}
h1, h2, h3, h4, h5, h6 {
margin-bottom: 20px;
text-transform: uppercase;
font-family: "Roboto Condensed", Helvetica, sans-serif;
font-weight: 300;
}
h1 {
font-size: 36pt;
}
h2 {
font-size: 24pt;
}
h3 {
font-size: 18pt;
}
h4 {
font-size: 16pt;
}
h5 {
font-size: 14pt;
}
h6 {
font-size: 12pt;
}
p {
font-size: 12pt;
margin-bottom: 12pt;
}
strong {
font-weight: 900;
font-family: "Roboto Condensed", Helvetica, sans-serif;
color: #e5e5e5;
}
a {
-webkit-transition: color 0.25s ease-in-out;
transition: color 0.25s ease-in-out;
font-family: "Roboto Condensed", Helvetica, sans-serif;
text-transform: uppercase;
text-decoration: none;
color: #dff3fd;
}
a:visited {
color: #dff3fd;
}
li.active a, a:hover, a:active {
color: #e5e5e5;
}
.centered {
position: absolute;
top: 50%;
left: 50%;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
}
.centered-y {
position: absolute;
width: 100%;
top: 50%;
-webkit-transform: translateY(-50%);
transform: translateY(-50%);
}
.distribution-map {
position: relative;
width: 100%;
padding: 20px;
box-sizing: border-box;
margin: 0 auto;
}
.distribution-map > img {
width: 100%;
position: relative;
margin: 0;
padding: 0;
}
.distribution-map .map-point {
cursor: pointer;
outline: none;
z-index: 0;
position: absolute;
width: 40px;
height: 40px;
border-radius: 20px;
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=80);
opacity: 0.8;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
-moz-transition: opacity 0.25s ease-in-out 0.25s, width 0.25s ease-in-out 0.25s, height 0.25s ease-in-out 0.25s, z-index 0.25s ease-in-out 0.25s;
-o-transition: opacity 0.25s ease-in-out 0.25s, width 0.25s ease-in-out 0.25s, height 0.25s ease-in-out 0.25s, z-index 0.25s ease-in-out 0.25s;
-webkit-transition: opacity 0.25s ease-in-out, width 0.25s ease-in-out, height 0.25s ease-in-out, z-index 0.25s ease-in-out;
-webkit-transition-delay: 0.25s, 0.25s, 0.25s, 0.25s;
-webkit-transition: opacity 0.25s ease-in-out 0.25s, width 0.25s ease-in-out 0.25s, height 0.25s ease-in-out 0.25s, z-index 0.25s ease-in-out 0.25s;
transition: opacity 0.25s ease-in-out 0.25s, width 0.25s ease-in-out 0.25s, height 0.25s ease-in-out 0.25s, z-index 0.25s ease-in-out 0.25s;
background: rgba(26, 26, 26, 0.85);
border: 5px solid #7fcff7;
}
.distribution-map .map-point .content {
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=0);
opacity: 0;
-webkit-transition: opacity 0.25s ease-in-out;
transition: opacity 0.25s ease-in-out;
width: 100%;
height: 100%;
left: 50%;
-webkit-transform: translateX(-50%);
transform: translateX(-50%);
overflow: overlay;
}
.distribution-map .map-point:active, .distribution-map .map-point:focus {
margin: 0;
padding: 0;
filter: progid:DXImageTransform.Microsoft.Alpha(enabled=false);
opacity: 1;
width: 300px;
height: 220px;
color: #e5e5e5;
z-index: 1;
-webkit-transition: opacity 0.25s ease-in-out, width 0.25s ease-in-out, height 0.25s ease-in-out;
transition: opacity 0.25s ease-in-out, width 0.25s ease-in-out, height 0.25s ease-in-out;
}
.distribution-map .map-point:active .content, .distribution-map .map-point:focus .content {
filter: progid:DXImageTransform.Microsoft.Alpha(enabled=false);
opacity: 1;
-moz-transition: opacity 0.25s ease-in-out 0.25s, height 0.25s ease-in-out, overflow 0.25s ease-in-out;
-o-transition: opacity 0.25s ease-in-out 0.25s, height 0.25s ease-in-out, overflow 0.25s ease-in-out;
-webkit-transition: opacity 0.25s ease-in-out, height 0.25s ease-in-out, overflow 0.25s ease-in-out;
-webkit-transition-delay: 0.25s, 0s, 0s;
-webkit-transition: opacity 0.25s ease-in-out 0.25s, height 0.25s ease-in-out, overflow 0.25s ease-in-out;
transition: opacity 0.25s ease-in-out 0.25s, height 0.25s ease-in-out, overflow 0.25s ease-in-out;
overflow: hidden;
}
.distribution-map .map-point:active .content a:hover, .distribution-map .map-point:active .content a:active, .distribution-map .map-point:focus .content a:hover, .distribution-map .map-point:focus .content a:active {
color: #afe1fa;
}
<link href='//fonts.googleapis.com/css?family=Roboto+Condensed:300,400,700' rel='stylesheet' type='text/css'>
<link href='//fonts.googleapis.com/css?family=Roboto:100,300,400,700,900' rel='stylesheet' type='text/css'>
<h1>Pure CSS Interactive Map</h1>
<p class="description">This doesn’t look great at small sizes — in the original, I have an alternate rule for displaying on mobile devices. <strong>Click the points to expand them.</strong></p>
<div class="distribution-map">
<!-- This was broken for a while because imgur :( -->
<!-- I don't trust this host. Image here if it goes down: http://i.imgur.com/M7aUkuS.png -->
<img src="http://s24.postimg.org/jnd9wc0n9/M7a_Uku_S.png">
<!--In the original application, these points are injected with Javascript, but ideally, they'd be injected with a haml loop. Because I'm hardcoding content, I'm presenting this as prerendered HTML-->
<button class="map-point" style="top:15%;left:35%">
<div class="content">
<div class="centered-y">
<h2>A Place</h2>
<p>You can put plenty of details in here. In the original, I listed contact information and linked phone numbers and email addresses.
You can put plenty of details in here. In the original, I listed contact information and linked phone numbers and email addresses.
You can put plenty of details in here. In the original, I listed contact information and linked phone numbers and email addresses.</p>
</div>
</div>
</button>
<button class="map-point" style="top:35%;left:50%">
<div class="content">
<div class="centered-y">
<h2>Another Place</h2>
<p>Lorem ipsum something something</p>
</div>
</div>
</button>
<button class="map-point" style="top:76%;left:82.5%">
<div class="content">
<div class="centered-y">
<h2>Marauder Town</h2>
<p>I solemnly swear that I am up to no good</p>
</div>
</div>
</button>
<button class="map-point" style="top:45%;left:16%">
<div class="content">
<div class="centered-y">
<h2>Logan's Mum</h2>
<p>I’m a marshmallow</p>
</div>
</div>
</button>
<button class="map-point" style="top:60%;left:53%">
<div class="content">
<div class="centered-y">
<h2>Toto</h2>
<p>I bless the rains</p>
</div>
</div>
</button>
<button class="map-point" style="top:25%;left:70%">
<div class="content">
<div class="centered-y">
<h2>With Love</h2>
<p>— 007</p>
</div>
</div>
</button>
</div>
<p class="description">It’s been brought to my attention that OSX/Safari doesn’t support :active for buttons with default settings, so you guys will have to resort to JS or hold down your mouse button to keep :focus triggered.</p>
and cannot figure out how to make the height of expanded button be adjusted to the content height. Currently the height of popup is:
.distribution-map .map-point:active, .distribution-map .map-point:focus{
...
height: 220px;
...
}
I need the minimum height be 100px, but when the content is bigger, the popup should increase correspondingly. I cannot achieve this by setting min-height of .map-point:active, it is not working because the content is always centered and goes out of the visible area. I'd appreciate any advise.

button width css transition doesn't work

I'm having a issue with a transition css property in a button tag.
When I hover the button I supposed it will go smoothly to width:auto, but it jump directly.
This is the code, what did I miss?
<button>Hello</button>
button {
padding: 10px;
width: 30px;
overflow:hidden;
transition: width 400ms ease-in-out;
-webkit-transition: width 400ms ease-in-out;
-moz-transition: width 400ms ease-in-out;
}
button:hover {
width: auto;
}

max-width is your friend
Demo
button {
padding: 10px;
width: auto;
max-width: 30px;
overflow:hidden;
transition: max-width 400ms ease-in-out;
-webkit-transition: max-width 400ms ease-in-out;
-moz-transition: max-width 400ms ease-in-out;
}
button:hover {
max-width: 100%;
}

Transition won't work with width: auto; you have to give a value in px, ems, percentage or whatever...

CSS transition not smooth

Good Day
I am using the CSS transition effect on a hover selector, but the 2nd part of the transition is not smooth - When I hover over the element, it moves smoothly. When I exit hover, the element drops back non-elegantly (not smooth/timed). How do I fix it?
#login{
margin-top: -10px;
margin-left: 10px;
display: inline-block;
}
#login:hover {
margin-top: 0px;
-webkit-transition: margin-top 0.2s ease-out;
-moz-transition: margin-top 0.2s ease-out;
-o-transition: margin-top 0.2s ease-out;
-ms-transition: margin-top 0.2s ease-out;
}
#login a{
background: #003399;
font-size: 38px;
color: #fff;
}
<div id="login" class="span1">
login
</div>
NOTE: look at my JSFIDDLE to see what I mean

As soon as you leave the div the :hover pseudo class is no longer satisfied. Thus the div loses the transition properties.
Simply move the transition block from #login:hover to #login and you are done.

You have to define also transition to normal state.
Edit: Like Raffael said it is only necessary to define transition effect in normal state
#login{
margin-top: -10px;
margin-left: 10px;
display: inline-block;
-webkit-transition: margin-top 0.2s ease-out;
-moz-transition: margin-top 0.2s ease-out;
-o-transition: margin-top 0.2s ease-out;
-ms-transition: margin-top 0.2s ease-out;
}
#login:hover {
margin-top: 0px;
}
#login a{
background: #003399;
font-size: 38px;
color: #fff;
}
<div id="login" class="span1">
login
</div>
DEMO

CSS background hover animation doesn't work when there is an image on top

The problem started when I needed to have a div set at 60% opacity and on hover it animates to 90% opacity.
The only catch is I need a full white (non transparent) PNG image on top of this box at all times.
So I tried the trick of overlaying a separate div containing the image and used the margins to bring it into position; BUT the background div animation hover over doesn't work when your mouse is on top of the image.
HTML
<div style="position:relative;top:-1px;left:0">
<div class="ontop"><img src="http://www.designdownloader.com/item/pngs/button01_google/button01_google-20110813210436-00005.png" alt="OneSpring - Play Video" /></div>
<div id="box-video">
</div>
</div>
</div>
CSS
#box-video {
position: absolute;
background-color:rgba(0,57,129,1);
top: 0;
left: 0;
padding: 15px;
font-family: 'Helvetica Neue Light', Arial, Helvetica, sans-serif;
width: 210px;
height: 130px;
opacity: 0.6;
filter: alpha(opacity=60);
-webkit-transition: opacity .25s ease-in-out;
-moz-transition: opacity .25s ease-in-out;
-ms-transition: opacity .25s ease-in-out;
-o-transition: opacity .25s ease-in-out;
transition: opacity .25s ease-in-out;
}
#box-video:hover, .ontop:hover {
cursor: pointer;
/*color: #ffffff;*/
text-decoration: none;
opacity: 0.9;
filter: alpha(opacity=90);
zoom: 1;
-webkit-transition: opacity .25s ease-in-out;
-moz-transition: opacity .25s ease-in-out;
-ms-transition: opacity .25s ease-in-out;
-o-transition: opacity .25s ease-in-out;
transition: opacity .25s ease-in-out;
}
div.ontop {
position: relative;
top: 4.7em;
left:30px;
z-index:1002;
}
Here is a JSFiddle showing the problem:
http://jsfiddle.net/xpancom/fZrWA/
How can you make the background hover work even when you are on top of the image?

You could alternatively use :before or :after pseudo class.
It will clean up your code a lot.
This is what your HTML can look like:
<div style="position:relative;top:-1px;left:0">
<div id="box-video"></div>
</div>
Here is more on them, and here is the fiddle: http://jsfiddle.net/jyHMf/
See if that is what you were looking for.

I think you're talking about CSS pointer-events property. pointer-events | MDN
So your code might look like this:
div.ontop {
position: relative;
top: 4.7em;
left:30px;
z-index:1002;
pointer-events: none;
}
http://jsfiddle.net/8CZEY/

Put an id on the container:
<div id="box" style="position:relative;top:-1px;left:0">
Now put the hover event on the container instead, and let it affect the child element:
#box:hover {
cursor: pointer;
}
#box:hover #box-video {
opacity: 0.9;
filter: alpha(opacity=90);
zoom: 1;
-webkit-transition: opacity .25s ease-in-out;
-moz-transition: opacity .25s ease-in-out;
-ms-transition: opacity .25s ease-in-out;
-o-transition: opacity .25s ease-in-out;
transition: opacity .25s ease-in-out;
}
Demo: http://jsfiddle.net/fZrWA/2/

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