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Rails, JS, CSS - can't get transition effect working

I have bar charts in my application that work fine but i'd like them to transition left to right on load across the screen. So I have tried the following:
CSS:
.progress-meter-interest{
background-color: #FFD733;
width: 250px;
}
.progress-meter-interest.horizTranslate {
animation-direction:normal;
-webkit-transition: 3s;
-moz-transition: 3s;
-ms-transition: 3s;
-o-transition: 3s;
transition: 3s;
}
In view:
<div class="progress-meter-interest horizTranslate" style ="width: <%= homework.average_interest * 100 / 5 %>%"><%= homework.average_interest %></div>
JS:
<script>
$(document).ready(function() {
$( ".progress-meter-interest" ).each(function() {
var length = $( this ).data("bar-length");
$( this ).css('width', length);
});
});
</script>
Clearly I am not defining data-bar-length as a set value in the div as the graphs are dynamic. When I do define it the transition effect works.
How do I get it to work with the dynamic data?
Thanks. Appreciate any help.

The transition shorthand property needs to know which property to transition. At the very least you will need to change transition: 3s to transition: width 3s so your CSS should look like:
.progress-meter-interest{
background-color: #FFD733;
width: 250px;
}
.progress-meter-interest.horizTranslate {
animation-direction:normal;
-webkit-transition: width 3s;
-moz-transition: width 3s;
-ms-transition: width 3s;
-o-transition: width 3s;
transition: width 3s;
}
See https://developer.mozilla.org/en-US/docs/Web/CSS/transition for more details on the transition property.

Slide down animation from display:none to display:block?

Is there a way to animate display:none to display:block using CSS so that the hidden div slides down instead of abruptly appearing, or should I go about this a different way?
$(document).ready(function() {
$('#box').click(function() {
$(this).find(".hidden").toggleClass('open');
});
});
#box {
height:auto;
background:#000;
color:#fff;
cursor:pointer;
}
.hidden {
height:200px;
display:none;
}
.hidden.open {
display:block;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="box">
Initial Content
<div class="hidden">
This is hidden content
</div>
</div>
And a JSFiddle

Yes, there is a way:
http://jsfiddle.net/6C42Q/12/
By using CSS3 transitions, and manipulate height, rather than display property:
.hidden {
height: 0px;
-webkit-transition: height 0.5s linear;
-moz-transition: height 0.5s linear;
-ms-transition: height 0.5s linear;
-o-transition: height 0.5s linear;
transition: height 0.5s linear;
}
.hidden.open {
height: 200px;
-webkit-transition: height 0.5s linear;
-moz-transition: height 0.5s linear;
-ms-transition: height 0.5s linear;
-o-transition: height 0.5s linear;
transition: height 0.5s linear;
}
More here: Slide down div on click Pure CSS?

Since you're already using jQuery, the simplest thing is just to use slideDown(). http://api.jquery.com/slidedown/
There's also slideToggle().
Then you don't need to manually do all the browser-specific transition css.

I like the idea of CSS transitions, but it's still very jumpy. Sometimes the max-height has to be set to a very high number because of dynamic content which renders the transition useless as it's very jumpy. So, I went back to jQuery, but it had its own faults. inline elements are jumpy.
I found this to work for me:
$(this).find('.p').stop().css('display','block').hide().slideDown();
The stop stops all previous transitions.
The css makes sure it's treated as a block element even if it's not.
The hide hides that element, but jquery will remember it as a block element.
and finally the slideDown shows the element by sliding it down.

What about
$("#yourdiv").animate({height: 'toggle'});
Toggle will switch your div on/off, and the animate should make it appear from below. In this scenario, you don't need the specific CSS to "hide" it.

We can use visibility: hidden to visibility: visible instead of display: none to display: block property.
See this example:
function toggleSlide () {
const div = document.querySelector('div')
if (div.classList.contains('open')) {
div.classList.remove('open')
} else {
div.classList.add('open')
}
}
div {
visibility: hidden;
transition: visibility .5s, max-height .5s;
max-height: 0;
overflow: hidden;
/* additional style */
background: grey;
color: white;
padding: 0px 12px;
margin-bottom: 8px;
}
div.open {
visibility: visible;
/* Set max-height to something bigger than the box could ever be */
max-height: 100px;
}
<div>
<p>First paragraph</p>
<p>Second paragraph</p>
</div>
<button
onclick="toggleSlide()"
>
toggle slide
</button>

I did this workaround for the navigation header in my React site.
This is the regular visible css class
.article-header {
position: fixed;
top: 0;
transition: top 0.2s ease-in-out;
}
This is the class that is attached to the div (when scrolled in my case)
.hidden {
top: -50px !important;
transition: top 0.5s ease-in-out;
}

You can use also
$('#youDiv').slideDown('fast');
or you can tell that the active div goes up then the called one goes down
$('.yourclick').click(function(e) {
var gett = $(this).(ID);
$('.youractiveDiv').slideUp('fast', function(){
$('.'+gett).slideDown(300);
});
});
Something like that.

Background images opacity fades out the whole element

I have a div element with background image, I'm trying to fade in and out background images with Jquery.
By now the function works well but it fades out the whole div and not only the background as I wish.
function rentPics()
{
$('#d2').css('background-image','url(' + mazdaArr[1] + ')');
interID=setInterval (changeImage,3000);
}
function changeImage()
{
$('#d2').animate({opacity: 0}, 1500, function(){
$('#d2').css('background-image', 'url(' + mazdaArr[x] + ')');
}).animate({opacity: 1}, 1500);
x++;
if (x==mazdaArr.length)
{
x=1;
}
}

If you're looking for a simple and lightweight cross-fading, use the CSS transition. This won't affect the text inside the element, the border and the box-shadow.
transition: background-image 1s ease-in-out;
-webkit-transition: background-image 1s ease-in-out;
-moz-transition: background-image 1s ease-in-out;
-ms-transition: background-image 1s ease-in-out;
-o-transition: background-image 1s ease-in-out;
Check out this fiddle.
It's supported by Chrome, Safari and Opera but I'm not quite sure with Firefox and IE
If you have a larger list of images to loop. You may also want to consider caching the images URL first because I noticed some flickering/blinking on first use. Check solutions here - Preloading CSS Background Images

The fade in applies opacity to the entire div with the background image incluide, you can do this creating a layer behind the div that you want apply the fade in and fade out.

Instead of using jQuery to animate opacity, you could have it add or remove a class. Then add transitions to your CSS, which should produce your desired result. Something like below might work. You can see the documentation of CSS transitions here. The only drawback is IE, per usual.
.element {
-webkit-transition: ease 0.2 all;
-moz-transition: ease 0.2 all;
-o-transition: ease 0.2 all;
-ms-transition: ease 0.2 all;
transition: ease 0.2 all;
}

Use a relative container with an absolute positioned overlay. Your HTML should look like this:
<div id="d2" class="image-wrapper">
<img src="/img/1.jpg" />
<div class="overlay"> your text goes here </div>
</div>
... and your CSS:
.image-wrapper {
position: relative;
}
.image-wrapper .overlay {
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
overflow: auto;
}
.image-wrapper img {
display: block;
}
Now you can change the opacity of your image without changing the content within the ovelay.

Change table contents on hover?

I have a table like this:
<div class="footer_row_3">
<table class="tableA">
<tr>
<td><img class="popcorn" src="http://i.imgur.com/HUjq2Va.png"></td>
<td><span class="statement">Lorem Ipsum</span></td>
<td><img class="popcorn" src="http://i.imgur.com/HUjq2Va.png"></td>
</tr>
</table>
</div>
What I want to do is that when the mouse hovers over tableA at any location within tableA, the following two changes happen:
Popcorn images change to this image: http://i.imgur.com/K29T3Fw.png
The text color changes to red.
It should have with a CSS 'fade' style transition, so that the contents fades into the updated style contents.
BOTH changes mentioned above should happen when I hover tableA from any place within tableA.
I know how to individually change text and image on hover, but I don't know how to do it together for multiple items.
How can I achieve this effect ?

Hover and change of other elements data/ styles is possible if the one element is the child of other
Here's a possible direction you can proceed and it works
#parent_element:hover > child_element {
//change your required styling or images
}
Heres the link
Hover to change

Try this:
CSS
span{
transition: color 2s ease;
}
.tableA:hover span{
color:red;
}
Plain Javascript (option 1)
document.getElementsByClassName('tableA')[0].onmouseover = function () {
var images = document.getElementsByClassName('popcorn');
console.log(images);
for (i = 0; i < images.length; i++) {
images[i].src = 'http://i.imgur.com/K29T3Fw.png'
}
};
Demo here
jQuery (option 2)
$('.tableA').hover(function () {
$('.popcorn').prop('src', 'http://i.imgur.com/K29T3Fw.png');
});
Demo here
EDIT:
New demo here

try this
table.tableA:hover span.statement {
color: red;
-webkit-transition: color 1s ease-in-out;
-moz-transition: color 1s ease-in-out;
-o-transition: color 1s ease-in-out;
-ms-transition: color 1s ease-in-out;
transition: color 1s ease-in-out;
}
table.tableA:hover img.popcorn {
opacity:0;
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
-ms-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
}
table.tableA td:first-child, table.tableA td:last-child {
background: url('http://i.imgur.com/K29T3Fw.png');
}
for better control and getting rid of first-child and last-child add classes to the tds.

javascript-triggered transitions with opacity and visibility in Safari

I'm using the following code.
By clicking on div id="popUpPane", the div and it's childs should appear and slowly fade in.
By clicking on the div again, it should slowly fade out and then disappear.
Firefox and Chrome (which is webkit too) behave that way and I know Safari did in an earlier version, too. But right know on Safari and on Safari Mobile nothing happens at all when I click on "popUpPane".
Is this a bug in Safari or is there something I could change to come back to the intended behaviour?
One addition: If I set -webkit-transition to -webkit-transition: opacity .5s ease-in-out; it works fine but the transition only appears on the first click. There's no transitions after that first one... If I delete the opacity-part in the java-script the opo-up works but there's no transition.
All other transitions on my site are working. But they all use only opacity and no visibility.
Here's my code:
CSS:
#popUpPane {
white-space:normal;
position:fixed;
width:100%;
height:100%;
top:0;
left:0;
text-align:center;
vertical-align:middle;
visibility:hidden;
z-index:90;
}
#greyOut {
position:fixed;
width:100%;
height:100%;
top:0;
left:0;
background-color:#000;
opacity:0;
}
#popUpPicCanvas {
position:relative;
top:50%;
margin-top:-325px;
display:inline;
opacity:0;
z-index:100;
}
.fade {
-webkit-transition: all .5s ease-in-out;
-moz-transition: all .5s ease-in-out;
-o-transition: all .5s ease-in-out;
transition: all .5s ease-in-out;
}
HTML:
<div id="popUpPane" onClick="noPopUp()">
<div id="greyOut" class="fade"> </div>
<canvas id="popUpPicCanvas" width="1000" height="650" title="Bastian Beuttel" class="fade"></canvas>
</div>
Javascript:
var popUpPane = document.getElementById("popUpPane"),
greyOut = document.getElementById("greyOut"),
popUpPicCanvas = document.getElementById("popUpPicCanvas"),
popCanvasContext = popUpPicCanvas.getContext("2d");
var doPopUp = function(source,x,y){
var popUpPic = document.getElementById("pic"+source);
popCanvasContext.canvas.width = x;
popCanvasContext.canvas.height = y;
popCanvasContext.drawImage(popUpPic, 0, 0,x,y);
popUpPane.style.visibility = "visible";
greyOut.style.opacity = "0.7";
popUpPicCanvas.style.opacity = "1";
};
var noPopUp = function(){
greyOut.style.opacity = "0";
popUpPicCanvas.style.opacity = "0";
popUpPane.style.visibility = "hidden";
};
I hope someone can help me.
Thanks for your responds!

Yep, there is a bug in mobile Safari with simultaneous transition for opacity+visibility.
You can fix it using something except for visibility: in your case setting the width and height to 0 would help. However you must add the delay, so they would change not instantly.
Here is a dabblet with the working example: http://dabblet.com/gist/1642110
/**
* Delayed alternative for visibility
*/
a {
display: inline-block;
background: #888;
color:#FFF;
padding: 1em;
}
div {
width: 100px;
height: 100px;
background: lime;
transition: opacity 1s;
}
a:hover+div {
width: 0;
height: 0;
opacity: 0;
transition: width 0s 1s, height 0s 1s, opacity 1s;
}

Thank you!
Since this bug is now removed from the latest releases of webkit the problem is gone for safari and chrome.
i started to have problems since the position of my div also was transitioned so I wrote it like this:
.dofade {
-webkit-transition: visibility .5s ease-in-out, opacity .5s ease-in-out;
-moz-transition: visibility .5s ease-in-out, opacity .5s ease-in-out;
-o-transition: visibility .5s ease-in-out, opacity .5s ease-in-out;
transition: visibility .5s ease-in-out, opacity .5s ease-in-out;
}