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javascript issue with fixed position side menu

I'm building a website with a sidebar that, once the user scrolls past a certain point it becomes fixed on the site. This code works fine.
The issue that I am coming into is that the sidebar is overlapping the footer when the user scrolls to the bottom of the page. I wrote code to detect when the bottom of the sidebar hits the same position as it's containing element - when that happens I am taking the position of the bottom of the containing element and subtract the height of the sidebar element and using that number to give the sidebar it's new "top" (while also changing the position to "absolute").
This is where I am running into the issue - once the sidebar is overtop of the footer as the user scrolls the code that is getting called alternates between the normal "fixed" position code and the "absolute" positioned code giving it this flickering effect.
For the life of me I can't figure out why the "fixed" code keeps getting called.
Here is the code:
( function( $ ) {
var sidebar_pos = $('#secondary')[0].getBoundingClientRect();
var pos_top = sidebar_pos.top + window.scrollY; //need this to get the pos of TOP in the browser - NOT the viewport
var main_pos = $('.main-content')[0].getBoundingClientRect();
var main_bottom = main_pos.bottom + window.scrollY;
var stop_pos;
var i = 0;
$(window).scroll(function(event){
var scroll = $(window).scrollTop();
var produce_pos = $('.produce')[0].getBoundingClientRect();
var pos_bottom = produce_pos.bottom + window.scrollY;
//console.log("scroll "+scroll);
//console.log("top " + pos_top);
console.log(main_bottom);
console.log('bottom ' + pos_bottom);
if( scroll >= pos_top){
if ( pos_bottom >= main_bottom ){
//if the sidebar would end up overlapping the footer
if(i == 0){
//only need to set this once, not on every scroll
stop_pos = main_bottom - $('#secondary').height() ;
}
$('#secondary').removeClass('hover').css({
position: 'absolute',
margin:0,
left: sidebar_pos.left,
top: stop_pos
});
i++;
} else {
$('#secondary').addClass('hover').css({
position: 'fixed',
left: sidebar_pos.left,
marginTop: '1.5em',
top: 20
});
setTimeout(() => {
$('*[data-widget="comet"]').addClass('active');
}, 5000);
setTimeout(() => {
$('*[data-widget="produce"]').addClass('active');
}, 7000);
}
} else if( scroll < pos_top && $('#secondary').hasClass('hover') ){ //if user scrolls up past original pos of sidebar, remove effects
$('#secondary').removeClass('hover').css({
position: 'relative',
left: 'auto',
top: 'auto'
});
i = 0;
}
});
}( jQuery ) );
I also have a codepen of the script in action.
https://codepen.io/antlaur00/pen/ExyrgYR
Any help is much appreciated! Thanks!

Well its pretty simple, just add Z-index property to your footer CSS, that way it will always overlap your sidebar .
You can refer to this article regarding the z-index property
https://www.w3schools.com/cssref/pr_pos_z-index.asp

jQuery | Keep top div element in view while window scrolling

I have a div element with class .b-widget and is present on the top of the page.
When I scroll down, the div goes away and when I scroll up it appears again.
I want it to stick to its place when i scroll down and resume when I scroll up.
I wrote below script but this is not helping either :
<script>
//keep element in view
(function($)
{
$(document).ready( function()
{
var elementPosTop = $('.b-widget').position().top;
$(window).scroll(function()
{
var wintop = $(window).scrollTop(), docheight = $(document).height(), winheight = $(window).height();
//if top of element is in view
if (wintop > elementPosTop)
{
//always in view
$('.b-widget').css({ "position":"fixed", "top":"50px" });
}
else
{
//reset back to normal viewing
$('.b-widget').css({ "position":"inherit" });
}
});
});
})(jQuery);
</script>

use css like this:
.b-widget{
position: fixed;
width: 100%;
top: 0;
left: 0;
}

Highlighting line of text in div while scrolling

I'm trying to highlight some text in a div, with the highlight being a fixed line in said text. So far I've got a very simple solution that uses two divs, one that houses the text, and the other acting as the highlight, and as you scroll the text, it will pass through the highlight div.
HTML is as follows:
<div id="test">
text...
</div>
<div id="highlight"></div>
CSS is:
#highlight {
position: fixed;
top: 50%;
width: 100%;
background-color: #ccff00;
height: 30px;
opacity: 0.6;
}
#test{
position: absolute;
font-size: 30px;
top: 50%;
}
A demo of it can be found here
I was wondering if anyone knows how to make it so that scrolling the text can be done in a way where as a user scrolls, the next line becomes highlighted. Currently it scrolls normally, so the highlight may miss a line, or not highlight a complete line. Additionally, I was wondering how it would be best to make the text scroll all the way to the bottom. Would adding a margin of the same size as the offset at the top work? Alternative solutions for any of this would be appreciated as well.

Try adding an event listener to the window on scroll. Then calculate the offset by taking the scrollY % line-height and set the highlight top margin to the negative of that value.
JavaScript below:
var highlight = document.querySelector("#highlight");
window.addEventListener('scroll', function(e){
var y = window.scrollY;
var offset = y % 30;
highlight.style.marginTop = - y % 30 + "px";
});
See Working Fiddle

Not sure if this
https://jsfiddle.net/ok0x3apo/6/ is what you're looking for
You can see that I'm remodifying the entered text, to get line by line highlight as page scrolls.
var el = document.getElementById("text"),
content = el.innerHTML.replace(/ |^\s+|\s+$/g,""),
lines = content.split(/\./);
var html = "";
for(var i in lines){
html+="<p class='clear_display' id='id_"+i+"'>"+lines[i]+".</p>";
};
document.getElementById("text").innerHTML=html;
You can make changes to the "clear_display" class on how you prefer to have the text block.
function calledEveryScroll() {
var scrollPosition = $(window).scrollTop();
for(var i in lines){
var currentSection = document.querySelector("#id_"+i+"");
var sectionTop = currentSection.offsetTop;
if (scrollPosition<=0){
$(".clear_display").removeClass('active');
document.querySelector("#id_0").className += " active";
}
if (scrollPosition >= sectionTop-50) {
$(".clear_display").removeClass('active');
if (!$(currentSection).hasClass('active')) {
$(currentSection).addClass('active');
if(previous){
if(currentSection.offsetTop==previous.offsetTop){
$(previous).addClass('active');
}
}
var previous = currentSection;
}
//return false;
}
}
}
function resizing(){
var offset =100;
var bottom = $(window).height()-offset;
$('#text').css('margin-bottom',bottom);
}
This function checks each line when page scrolls.For the scroll to reach the bottom I'm calculating the margin-bottom.Hope it helps.

Javascript - Make div follow page ( works but it pushes sidebar too?)

/-----------------------------------------------------------------------------------/
EDIT: I do NOT want to use fixed CSS positioning. It's at the bottom of the viewport
without scrolling, however I want it to follow when it gets to the top.
/-----------------------------------------------------------------------------------/
I'm making a Squeeze Page with a MASSIVE sidebar. It's got tons of testimonials and facts and pictures and stuff. However, I have a button near the top I want to follow the user down the page as they scroll. Shouldn't be too hard right?
I've got this script - which starts dragging the .followme when it hits the top of the page. However - it also pushed down all the divs beneath it. Can I tell it to target JUST .follow and no affect the divs below it?
<script type="text/javascript">
var documentHeight = 0;
var topPadding = 15;
$(function() {
var offset = $(".followme").offset();
documentHeight = $(document).height();
$(window).scroll(function() {
var sideBarHeight = $(".followme").height();
if ($(window).scrollTop() > offset.top) {
var newPosition = ($(window).scrollTop() - offset.top) + topPadding;
var maxPosition = documentHeight - (sideBarHeight + 100);
if (newPosition > maxPosition) {
newPosition = maxPosition;
}
$(".followme").stop().animate({
marginTop: newPosition
});
} else {
$(".followme").stop().animate({
marginTop: 0
});
};
});
});

You have an easier option which doesn't require any JS\jQuery at all.
.followme {
position: fixed;
height: 30px;
width: 30px;
background-color: #FF0000;
top: 48%;
left: 0;
}
This will never affect any of the other elements of the page and doesn't require any scripting at all. Now if you need the element (followme) to for example show at a certain scroll % or any other interactivity you might think of, then you will be needing to think more creatively. But if the problem is just to let the element follow your scrolling then the above should be a good and clean solution.
Example code:
http://jsfiddle.net/bhpgC/

Change Div Y Position with mouse wheel and sidebar

I need that when I scroll down or up with mouse wheel or sidebar my div change incrementally the Y position (for example 50px up or down ). I need this in Javascript/Jquery.
I Try this code, but only works for scrolling down(The Scrolling Down and Up Function is working well, only the animate part is working wrong):
UPDATE:
var sidebarScrollTop = 0;
$(document).ready(function() {
sidebarScrollTop = $("body").offset();
$(window).scroll(function ()
{
var docScrollTop = $('body,html').scrollTop();
if(docScrollTop > sidebarScrollTop.top)
{
$("#legend").stop().animate({ marginTop: "+=50px",}, 'slow', "easeOutCirc" );
}
else
{
$("#legend").stop().animate({ marginTop: "-=50px",}, 'slow', "easeOutCirc" );
}
});
});
$(window).resize(function()
{
sidebarScrollTop = $("#legend").offset().top;
});
$(document).resize(function()
{
sidebarScrollTop = $("#legend").offset().top;
});
Thanks

You can use
$(window).scroll(function() {
// Your scroll code here
});
to grab whenever the user is scrolling on the page.
Next you want to change the div's y-value.
If the div is positioned absolute, this is just changing its top-value.
$('my-div').top = original-top-value + $(window).pageYOffset;

I believe you need is to keep the div always showing even when user scrolls down. If that is the case then it can be done with only CSS:
div {
position: fixed;
z-index: 100;
top: 100px;
left: 100px;
}
The values of z-index, top and left are dummy values. Change em with your ones.
UPDATE:
Since CSS Solution won't work for you, here is a working example writter in JS: http://jsfiddle.net/qCtt5/