Develop Reference

Replacing two divs without having bottom content flicker during the replacement

I have two divs with very similar content.
When the button is clicked, I would like the first div to disappear and the second one to appear in the exact same place.
They do not have a constant height, but they should have the same automatic height because they have very similar content.
I implemented this example to demonstrate the problem.
In this snippet, you can see that once the button is clicked, the divs are replaced with a fade in/out animation.
The problem is that the content below (text text in this example), goes up and down during the fade in / out process, which impacts negatively on user experience.
Assuming there is a lot of content below these divs, it just doesn't look good.
What would be the best way to implement this behavior without having all content below the divs "flicker" during the replacement?
$("#clicker").click(function() {
if ($('.first').is(':visible')) {
$('.first').fadeOut();
$('.second').fadeIn();
} else {
$('.second').fadeOut();
$('.first').fadeIn();
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<button id="clicker">Click me</button>
<div style="background-color:yellow;display:none" class="first">first content</div>
<div style="background-color:red" class="second">second content</div>
<div id="more_stuff_here">
text text<br> text text
</div>

This is happening because you have applied fade effect for both display:none and display:block. So it will disturb your layout because at some point of animation both elements are becoming display:block.
So the solution is there is no need of fade effect when you are doing display:none. Just use hide().
So use hide() instead of fadeOut(). fadeIn() will animate your content.
Stack Snippet
$("#clicker").click(function() {
if ($('.first').is(':visible')) {
$('.first').hide();
$('.second').fadeIn();
} else {
$('.second').hide();
$('.first').fadeIn();
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<button id="clicker">Click me</button>
<div style="background-color:yellow;display:none" class="first">first content</div>
<div style="background-color:red" class="second">second content</div>
<div id="more_stuff_here">
text text<br> text text
</div>

$("#clicker").click(
function()
{
if ($('.first').is(':visible')) {
$('.first').fadeOut();
$('.second').fadeIn();
}
else {
$('.second').fadeOut();
$('.first').fadeIn();
}
}
);
.first, .second {
position: absolute;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<button id="clicker">Click me</button>
<div style="background-color:yellow;display:none" class="first">
first content
</div>
<div style="background-color:red" class="second">
second content
</div>
<div id="more_stuff_here">
text text<br>
text text
</div>

I prefer you to wrap .first and .second in a div with constant height.
<div class="container"><div class="first">....</div><div class="second">....</div></div>

After page load bootstrap always changes position of elements with absolute position on phones

Concrete problem is that I want have a page on server with structure of elements with nice positioning, but I couldn´t get it into desired shape, but only with setting them absolute position counted by screen resolution on mobile phones with jquery. After page load bootstrap will move my elements with absolute path more up. All those elements are at the bottom of page. I know that it is bootstrap, because when I will not add bootstrap server links, everything is fine as far as position of my elements is concerned. But naturally I need bootstrap there.
I tried to figure it out in many ways, but I ended with tryings to wait with jquery till the page load and after that try to set position. But no, after all moving in function that is called after page load, bootstrap starts doing it´s job later as last and don´t know how and why, but it trim my elements and push all my circles all up with bad height positions.
$(document).ready(function () {
// script for setting bubble circles in right place on whatever screen
// this is updated question for correct answer below, id=allCircles is id of global div for circles
$width = $('#allCircles').width();
$circleWidth = parseInt($('.circle').css('width'),10);
$circlesDistance = 60;
$leftCircles = ($width)/2 -(($circlesDistance/2)+$circleWidth);
$rightCircles = ($width)/2 + ($circlesDistance/2);
$('.left-circle').css('left', $leftCircles+'px' );
$('.right-circle').css('left', $rightCircles +'px');
$actPosition = $("#leftDownCircle").position();
$heightMargin= $actPosition.top + $circleWidth/2;
$('#leftDownCircle').css('top', $heightMargin+'px' );
$('#rightDownCircle').css('top', $heightMargin+'px' );
$leftMargin = ($width)/2 - ($circleWidth/2);
$heightMargin = ($heightMargin) -($circleWidth/2)-($circleWidth/4);
$('#middleCircle').css('position','absolute');
$('#middleCircle').css('left', $leftMargin +'px' );
$('#middleCircle').css('top', $heightMargin +'px' );
});
* {margin:0;}
.circle {
width: 100px;
height: 100px;
background: lightgrey;
-moz-border-radius: 50px;
-webkit-border-radius: 50px;
border-radius: 50px;
line-height: 1;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
.left-circle {
position: absolute; left: 15%;
}
.right-circle {
position: absolute; left: 60%;
}
<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css">
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>
<body>
<div class="left-circle">
<div class="circle">
<h1>9</h1>
<p>Level</p>
</div>
</div>
<div class="right-circle">
<div class="circle">
<h1>9</h1>
<p>Level</p>
</div>
</div>
<div id="middleCircle">
<div class="circle">
<h1>9</h1>
<p>Level</p>
</div>
</div>
<div class="left-circle" id="leftDownCircle">
<div class="circle">
<h1>9</h1>
<p>Level</p>
</div>
</div>
<div class="right-circle" id="rightDownCircle">
<div class="circle" >
<h1>9</h1>
<p>Level</p>
</div>
</div>
</body>
</html>
When I will add in this code to html header this:
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
Then on phone it will result to this:
Could someone help me to answer how this can be done programmatically correctly? (maybe why this not work or what is better practice to make the desired result as in snippet, thanks in advance for any help and your time!)
Now concrete site whith its code in it. Web emulator looks:
http://mobiletest.me/htc_one_emulator/?u=https://stackoverflowtest.000webhostapp.com/
Concrete site to test with your mobile device:
https://stackoverflowtest.000webhostapp.com/
Notice left-down waiting for bootstrap and after reload:

The basic problem you are having is that by making the elements absolute, they are positioned in relation to the nearest non-static parent element. I don't see any non-static parent elements on your page, so in your case they will be positioned relative to the body. This causes a problem as you have lots of other elements that can be different sizes (e.g. because of text wrapping over multiple lines on mobile screen that would only take one line on desktop size) before you get to the circles so determining the right top value in relation to body is not possible.
Note, two of your circles don't have a top value set, so they are placed in their default static places, which is why you are getting the overlaps.
To fix it, you need to place a non-static element around your absolute elements (e.g. by giving it a position:relative style). Position top and left values the circles in relation to that element and give the element a height that will give the circles enough space.
e.g.
<div style="min-height: 550px;position:relative;">
<div class="left-circle" style="left: 30px;">
<div class="circle">
<h2>345</h2>
<p>Bodov</p>
</div>
</div>
<div class="right-circle" style="left: 190px;">
<div class="circle">
<h2>11</h2>
<p>Best of</p>
</div>
</div>
<div id="middleCircle" style="position: absolute;
left: 110px;
top: 100px;">
<div class="circle">
<h1>9</h1>
<p>Uroven</p>
</div>
</div>
<div class="left-circle" id="leftDownCircle" style="left: 30px;
top: 198px;">
<div class="circle">
<h2>1622</h2>
<p>Zaradenych knih</p>
</div>
</div>
<div class="right-circle" id="rightDownCircle" style="left: 190px;
top: 198px;">
<div class="circle">
<h2>124</h2>
<p>Citatelov</p>
</div>
</div>
</div>
The key things to note here are:
I have put all your circles inside a div with a position:relative and a height:550px;
I have changed the top values of the circles to position themselves in relation to this new parent div.

horizontal scrolling jquery working on entire page

I am working on a site.I need horizontal scrolling on a particular section,for that i am using JinvertScroll jquery.When i run that jquery's example the scrolling is working on entire page.how can i set the scrolling for particular section only??I mean how can i set that particular div that should scroll?Here is the code.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<link rel="stylesheet" href="css/example.css" />
</head>
<body>
<section id="scrolll">
<div class="middle scroll" style="border:solid red;backgroun:red">
<img src="images/middle.png" alt="" />
</div>
<script type="text/javascript" src="../libs/jquery.min.js"></script>
<script type="text/javascript" src="../src/jquery.jInvertScroll.js"></script>
<script type="text/javascript">
(function($) {
var scrolll= document.getElementById('scrolll');
var elem = $.jInvertScroll(['.scroll'], // an array containing the selector(s) for the elements you want to animate
{
height: 600, // optional: define the height the user can scroll, otherwise the overall length will be taken as scrollable height
onScroll: function(percent) { //optional: callback function that will be called when the user scrolls down, useful for animating other things on the page
console.log(percent-50);
}
});
$(window).resize(function() {
if ($(window).width() <= 768) {
elem.destroy();
}
else {
elem.reinitialize();
}
});
}(jQuery));
</script>
</section>
<section>
<div style="border:solid orange;height:1000px"></div>
</section>
</body>
</html>

<div id="scrollDiv" style="overflow:auto;">
// write code here over which scroll will be applied
</div>
The section you want to scroll place it inside a div . Give that div an Id e.g. scrollDiv and Place a style attribute on it as shown in the example above.

You don't need plugin for that. Just use height and overflow-y where you want a scroll
#scrolll{height: 600px;
overflow-y: scroll;}
<section id="scrolll">
<div class="middle scroll" style="border:solid red;backgroun:red">
<img src="images/middle.png" alt="" />
</div>
</section>
<section>
<div style="border:solid orange;height:1000px"></div>
</section>

Arrows besides bootstrap container

I have a bootstrap container. As this is common for it, it doesn't take the hole page width, but is centered with a lot of margin on the left and right side.
What I'm trying to achieve is, that on the left and the right side (so besides the div with the container class, there are 2 centered arrows, left side pointing to left and right side pointing to the right.
You wonder, why I want to do that? I try to make something like a Carousel, but with pages, so when I click on the right arrow, there comes the content of the next page, clicking on the left arrow then, I get back to the other page.. I hope you know what I mean...
What I have is this:
<!DOCTYPE html>
<html>
<head>
<title>Drag and Drop Upload</title>
<link rel="stylesheet" href="css/bootstrap.min.css" type="text/css"/>
<link rel="stylesheet" href="css/style.css" type="text/css"/>
<link rel="stylesheet" href="css/dropzone.css" type="text/css"/>
<script src="js/jquery-1.12.3.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script src="js/dropzone.js"></script>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<div class="container fill">
<form action="upload.php" class="dropzone needsclick dz-clickable full-height">
<div class="dz-message"><b> </b></div>
</form>
</div>
</body>
</html>

You could do it globally as Bootstrap does with the arrow in the carousel :
Having parents containers in each side of the page, fixed to the top AND with the screen's height as fixed height (easy to do with JQuery).
<body>
<div class="parentofarrow left"><div class="parrentofarrow__arrow left"></div></div>
<div class="parentofarrow right"><div class="parrentofarrow__arrow right"></div></div>
<div class="container"></div>
</body>
You could have a another parent for all of them to have a different structure or anything. (in this case change position fixed to position absolute)
And in css :
.parentofarrow {
position: fixed; // or absolute to a specific parent (relative)
top: 0px;
// height fixed with screensheight using Jquery
width: // as you wish;
text-align: center; // or margin auto on arrows
}
.parentofarrow.left { left: 0px; }
.parentofarrow.right { right: 0px; }
.parentofarrow__arrow { //customize and positionning as you wish }
And in these parents, having a vertical and horizontal align arrow with a specific action linked to change page content as you wish.
Should be enough!
Note that this solution is not the easiest but it offers a certain modularity (change height, parent, position...).

The simplest way without taking your elements position in consideration would be using negative margins. (fiddle here)
html:
<div id="arrow">←</div>
css:
#arrow {
margin-left: -100px;
}
Another viable way is to use position: absolute like this:
#container {
position: relative;
}
#left-arrow {
position: absolute;
top: 40%;
bottom: 40%;
height: 10%;
line-height: 100%;
left: -5%;
}

The easiest solution is too use the grid system.
<div class="container fill">
<div class="row">
<div class="col-xs-1">Left</div>
<div class="col-xs-10 main-stage">
<form action="upload.php" class="dropzone needsclick dz-clickable full-height">
<div class="dz-message"><b> </b></div>
</form>
</div>
<div class="col-xs-1">Right</div>
</div>
</div>
</body>

Resizable split screen divs using jquery UI

I have a design in mind that involves a split panel view in html, similar to a winforms split panel. I've been expirimenting with jQuery UI - Resizable and I like the function, I just can't seem to co-ordinate the resizing of the two divs. The problem with the current code is that the two divs resize away from each other, not with one following the other. How can I make the two divs work together?
<html>
<head>
<title>Test</title>
<link rel="stylesheet" type="text/css" href="css/custom.css" />
<link rel="stylesheet" type="text/css" href="css/superfish.css" media="screen">
<link rel="stylesheet" type="text/css" href="css/jquery-ui-1.8.10.custom.css" media="screen">
<script type="text/javascript" src="script/jquery-1.5.1.js"></script>
<script type="text/javascript" src="script/superfish.js"></script>
<script type="text/javascript" src="script/jquery-ui-1.8.10.custom.min.js"></script>
<script type="text/javascript">
// initialise plugins
$(function(){
try {
$('ul.sf-menu').superfish();
//set up divs
$('#Content').resizable({ handles: 'e', alsoResize: $('#Attributes')});
}catch(ex){
alert(ex.message);
}
});
</script>
</head>
<body>
<div id="Header">
<div id="Menu">
<ul class="sf-menu" id="nav">
<!-- Snip menu -->
</ul>
</div>
</div>
<div id="Middle">
<div id="Content" class="ui-widget-content">This is where the view is.<br/>
Imagine an image here ...
<br/>
<br/>
<br/>
</div>
<div id="Attributes" class="ui-widget-content">
<ul>
<li>A</li>
<li>B</li>
<li>C</li>
</ul>
</div>
</div>
<div id="FootBreak"/>
<div id="Footer">
Help
</div>
</body>
</html>

I have worked out a reasonable hack, using the resize event.
<script type="text/javascript">
var WIDTH_ATTR = 'initWidth';
// initialise plugins
$(function(){
try {
$('#Content').resizable({ handles: 'e', resize: resizeAttr });
$('#Content').attr(WIDTH_ATTR, $('#Content').width());
$('#InfoPanel').attr(WIDTH_ATTR, $('#InfoPanel').width());
}catch(ex){
alert(ex.message);
}
});
function resizeAttr(event, ui){
var change = ui.size.width - $('#Content').attr(WIDTH_ATTR);
$('#InfoPanel').width($('#InfoPanel').attr(WIDTH_ATTR) - change);
};
</script>
I'm still open to cleaner answers from others...

I am not sure if this meets the requirements, but ExtJS handles split panes with ease and works cross-browser. For example, see this RSS feed client in ExtJS. Be aware the ExtJS has commercial licensing restrictions if your intent is to sell your product.

Here is an example with a horizontal split (one top div, one bottom div), maybe slightly more minimalistic:
HTML:
<html>
<head>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>
<body>
<div id="div1">1st</div>
<div id="div2">2nd</div>
</body>
</html>
CSS:
#div1, #div2 {
position: absolute;
left: 0;
right: 0;
outline: solid 1px #ccc; /* just for making the divs visible */
margin: 5px; /* just for making the divs visible */
}
#div1 {
height: 100px;
top: 0;
}
#div2 {
top: 110px;
bottom: 0;
}
JavaScript:
$('#div1').resizable({
handles: 's',
resize: resizeEventHandler
});
function resizeEventHandler(event, ui){
var new_height = ui.size.height;
$('#div2').css('top', new_height + 10);
}
See demo here.