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Horizontal parallax effect to text on scroll

So I sort of got it working. I believe I am not understanding the javascript correctly.
I took this from another thread, however it isn't behaving quite the way I am trying to achieve. I see the variables are a math equation that bases the movement on the window height.
How can I manipulate the equation so that I can control "Some cool text."'s initial position (if you notice on load it takes the correct position, and then on scroll it gets moved by JS) to stay where I want it?
What controls the speed and intensity of the movement and how can I manipulate that?
I believe I am just not understanding the syntax that controls all these variables, can you point me in the right direction for some reading to understand these specific variables? Thank you. :D
https://jsfiddle.net/codingcrafter/kv9od1ju/22/
/* Custom Horizontal Scrolling Parallax */
.hero-two {
overflow: hidden;
position: relative;
min-height: 500px;
}
h1 {
-webkit-text-stroke-width: 0.1rem;
-webkit-text-stroke-color: black;
color: #fff;
font-family: 'Open Sans', Helvetica, Times New Roman !important;
font-weight: 900;
}
.para-ele {
position: absolute;
width: 100%;
font-size: 5rem;
}
#hero-first {
left: 75%;
top: 15%;
}
#hero-second {
left: -32%;
bottom: 10%;
}
.container {
position: relative;
box-sizing: border-box;
width: 100%;
height: 100%;
}
<div class="container">
<div class="hero-two">
<h1 id="hero-first" class="h1 para-ele">
Some cool text.
</h1>
<h1 id="hero-second" class="h1 para-ele">
Some boring text.
</h1>
</div>
</div>
$(document).ready(function() {
var $horizontal = $('#hero-first');
$(window).scroll(function() {
var s = $(this).scrollTop(),
d = $(document).height(),
c = $(this).height();
scrollPercent = (s / (d - c));
var position = (scrollPercent * ($(document).width() - $horizontal.width()));
$horizontal.css({
'left': position
});
});
});

So you want to move the text from left to right or right to left?
I have done something similar to your issue but I used jQuery to handle the scroll effect.
If you are going to use the code below you will need to wrap the text within a element with the class Introduction
As the page scrolls the element will append the styles dynamically to the element.
<h1 class="introduction">
WE ARE A <br><span class="d">DIGITAL</span><br>PARTNER
</h1>
$(window).scroll(function() {
var wScroll = $(this).scrollTop();
$(".introduction").css({
transform: "translateX(-" + wScroll / 23 + "%)"
})
});
Demo: https://guide-nancy-64871.netlify.com/
When page is scrolled the header text moves to the left.
Read more on css transform: https://css-tricks.com/almanac/properties/t/transform/
Hope this helps!

Always scroll the div container to the bottom when creating child divs

first these are my references
jQuery Scroll to bottom of page/iframe
jQuery Scroll To bottom of the page
I create some divs and put them into a div container. I want the container always scrolling down to the newest div at the bottom.
$(document).ready(function() {
var container = $("#container");
var i = 0;
$("#btn").click(function() {
i++;
var div = $("<div></div>");
div.addClass("d");
div.html("Container " + i);
container.append(div);
container.scrollTop(container.height());
});
});
body {
background: white;
}
#container {
height: 160px;
width: 120px;
overflow-y: scroll;
background: gray;
}
.d {
height: 30px;
margin-bottom: 10px;
background: red;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="btn">-- Add --</button>
<div id="container">
</div>
As you can see, this works fine untill I create more than 8 divs. Then the logic will break and the container does not scroll anymore.
The container should scroll to the current div with the number i (the current index)

Simply because the height is always fixed, instead consider scrolling with the height of all the child elements including their top/bottom margin. In other words, the height of the container if there is no fixed height specified.
To be more precise you only need to scroll with the height of all the child element minus the fixed height of the container which is the overflowing part. That's why your code work partially because until 8 elements you have an overflow lower than the fixed height of the container ( 8 * 40 = 320 => 320 - 160(fixed height) = 160(overflow) )
$(document).ready(function() {
var container = $("#container");
var i = 0;
$("#btn").click(function() {
i++;
var div = $("<div></div>");
div.addClass("d");
div.html("Container " + i);
container.append(div);
container.scrollTop(container.find('.d').length *
($('.d').height() + 10) -
container.height());
});
});
body {
background: white;
}
#container {
height: 160px;
width: 120px;
overflow-y: scroll;
background: gray;
}
.d {
height: 30px;
margin-bottom: 10px;
background: red;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="btn">-- Add --</button>
<div id="container">
</div>

keep the background image fixed position and centered

In my project, I need to show a small image in center of the visible part of the container, with respect to the window i.e .loader. Even when the user scrolls the page, the image should be visible in center of .loader.
I successfully implemented this but now I am facing a edgecase which is when user scrolls the page "up to the header" or "down to the footer", the small image is hiding. demo.
This is actually normal behaviour but in these edgecases, I want the image to stick to top/bottom end of the .loader container.
What I want:
Keep the small image always at center of .loader container. (I already implemented this)
when scrolled to any end of .loader container, the image should stick to that end instead of hiding behind the container.
Fiddle
A solution using just css is preferred. I am looking for browser support in IE9+, chrome and firefox.
.header {
height: 600px;
width: 650px;
background-color: grey;
}
.left-side {
height: 300px;
width: 150px;
float: left;
background-color: red;
}
.loader {
background-image: url('http://i.imgur.com/U2njI.jpg');
margin-left: 150px;
height: 1500px;
width: 500px;
background-position: 345px center;
background-repeat: no-repeat;
background-attachment: fixed;
background-color: cornflowerblue;
}
.footer {
height: 600px;
width: 650px;
background-color: silver;
}
<div class="header"></div>
<div class="left-side"></div>
<div class="loader"></div>
<div class="footer"></div>

Here is a working solution with javascript, I hope its behaviour is how you expect it to be. I'm unfortunately not able to test it on IE9 right now but it should work (DEMO):
document.addEventListener('DOMContentLoaded',function() {
var loader = document.querySelector('.loader'),
loaderRect = loader.getBoundingClientRect(),
loaderTop = loaderRect.top + document.body.scrollTop,
loaderBottom = loaderTop + loader.offsetHeight,
initialBgPos = loader.style.backgroundPosition,
imageHeight = 141;
function onScroll() {
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
if(loaderTop >= (scrollTop + (window.innerHeight - imageHeight)/2)) {
loader.style.backgroundPosition='345px ' + (loaderTop - scrollTop) + 'px';
} else if(loaderBottom <= (scrollTop + (window.innerHeight + imageHeight)/2)) {
loader.style.backgroundPosition='345px ' + (loaderBottom - scrollTop - imageHeight) + 'px';
} else {
loader.style.backgroundPosition = initialBgPos;
}
}
window.addEventListener('scroll', onScroll);
onScroll();
});

To achieve what I think you want. We have to set the position of the .loader div to fixed, then it'll always stay where it's placed, regardless of whether the user scrolls the page, the div will scroll too. In here's how to set the position of loader to fixed in CSS (you may also have to get the position of your fixed div):
.loader{
position: fixed;
left: 100px;
top: 300px;
}
Here's your upadted JSFiddle: http://jsfiddle.net/Ezhb4/4/

How to trigger the layout to change?

I've a sticked element which gets the top-alignment from current scroll-offset. Problem is, that the layout is not "retriggerd" if the space from it is free. So there stays a ghost-gap where the sticked element was...
http://fiddle.jshell.net/pPc4V/
The markup is pretty simple:
...
as well as the js:
var $win = $(this);
var sticked = document.querySelector('a.sticked');
$win.on('scroll', function () {
var scrollTop = $win.scrollTop();
sticked.style.top = scrollTop + 'px';
// $win.resize();
});
...and the css looks good so far:
a {
display: inline-block;
width: 90px;
height: 90px;
background: deepskyblue;
}
.sticked {
position: relative;
top: 0;
left: 0;
background: tomato;
}
I tried to trigger the resize-event on scroll (as you see above uncommented), but no success! Any ideas, how to retrigger the layout so that the free-gap is filled with the next floated element?
Update
To clarify what I mean I made a simple image-timelime:
Step 1
Step 2
Step 3

The issue is that you are setting position fixed on an element which is displayed inline. That will cause that space to occur. I have redid your jsFiddle with proper alignment.
To fix it, I added the class "stuck" only when the document's scrollTop position is greater than the scrollTop position of your target element.
jsFiddle: http://fiddle.jshell.net/pPc4V/44/
HMTL:
<div id="grid">
etc...
</div>
CSS:
#grid {
height:1000px;
overflow:hidden;
float:left
}
#grid > a {
display: inline-block;
width: 90px;
height: 90px;
background: deepskyblue;
}
.stuck {
position: fixed;
background: navy !important;
}
JS:
$(window).on('scroll', function () {
var $doc = $(document),
parentElement = $('#grid'),
childToGetStuck = parentElement.find('a:nth-child(5)');
if ($doc.scrollTop() > childToGetStuck.scrollTop()) {
childToGetStuck.addClass('stuck');
//console.log($('.stuck').scrollTop())
} else {
childToGetStuck.removeClass('stuck');
}
});

Sticky Header - buggy jumping on scroll

I have a specific problem on making a sticky header with jQuery. I tried the commonly used snippets around the web, but I perceived the same buggy thing everywhere.
At a specific document height (scrollable until a little more than calling of sticky-effect) the sticky header jumps between position: fixed and position: static.
HTML:
<header>
<div id="not-sticky"></div>
<div id="sticky"></div>
</header>
<div id="content"> ...
jQuery:
var $sticky = $("#sticky");
var offset = $sticky.offset();
var stickyTop = offset.top;
var windowTop = $(window).scrollTop();
$(window).scroll(function() {
windowTop = $(window).scrollTop();
if (windowTop > stickyTop) {
$sticky.css({
position: 'fixed',
top: 0
});
}
else {
$sticky.css({
position: '',
top: ''
});
}
});
CSS:
header {
width: 100%;
}
#not-sticky {
padding: 50px 0;
width: 100%;
}
#sticky {
padding: 24px 0;
position: relative;
width: 100%;
z-index: 25;
}
I also tried a margin-bottom on #not-sticky with the same height as the #sticky to keep a constant document-height, but the same jumpy-sticky-effect occurred.
Any idea to fix that thing?

Scroll fires too many times and trying to set an element style will always & inevitably create jumps (even barely noticeable but still jaggy).
The best way I've found is to
clone our element,
make that clone fixed
play with clone's visibility style.
Pure JS:
;(function(){ /* STICKY */
var sticky = document.getElementById("sticky"),
sticky2 = sticky.cloneNode(true);
sticky2.style.position = "fixed";
document.body.appendChild(sticky2);
function stickIt(){
sticky2.style.visibility = sticky.getBoundingClientRect().top<0 ? "visible" : "hidden";
}
stickIt();
window.addEventListener("scroll", stickIt, false );
}());
#sticky{
height:100px;
background:#ada;
height:50px;
position:relative;
/* needed for clone: */
top:0;
width:100%;
}
/* Just for this demo: */
*{margin:0;padding:0;}
#content{height:2000px; border:3px dashed #444;}
h1{padding:40px; background:#888;}
<h1>Logo</h1>
<div id="sticky">Sticky header</div>
<div id="content">Lorem ipsum...<br>bla bla</div>
So when you see the "header" fix, that's actually our fixed clone getting visible on-top.