scroll through divs stacked on each other - javascript

Long story short: I'd like to scroll through full-screen divs. Looking at previous question I found this which is quite close to what I need but with some changes.
https://jsfiddle.net/naqk671s/
Instead of having the div #1 fixed and the #2 landing on the top of it, I'd like to have the #1 going up and revealing the #2.
My confidence with jQuery is not so big, so I tried to change some values but I just made it worst. do you think is possible to achieve the result with few changes or should I just start from scratch?
under = function(){
if ($window.scrollTop() < thisPos) {
$this.css({
position: 'absolute',
top: ""
});
setPosition = over;
}
};
over = function(){
if (!($window.scrollTop() < thisPos)){
$this.css({
position: 'fixed',
top: 0
});
setPosition = under;
}
};
To make my self more clear, what I'm trying to achieve is basically the opposite of the fiddle I've posted. If you scroll all the way down and than start to scroll up that will be the effect I'd like to achieve but upside down.
Thanks in advance

Update:
After comment, request became clearer, look these examples...
Pure CSS: https://jsfiddle.net/9k8nfetb/
Reference: https://www.w3schools.com/howto/howto_css_sticky_element.asp
jQuery: https://jsfiddle.net/kajwhnc1/
Reference: multiple divs with fixed position and scrolling
Another jQuery: https://jsfiddle.net/6da3e41f/
Reference: How to make div fixed after you scroll to that div?
Snippet
var one = $('#one').offset().top;
var two = $('#two').offset().top;
var three = $('#three').offset().top;
var four = $('#four').offset().top;
$(window).scroll(function() {
var currentScroll = $(window).scrollTop();
if (currentScroll >= 0) {
$('#one').css({
position: 'fixed',
top: '0',
});
} else {
$('#one').css({
position: 'static'
});
}
if (currentScroll >= two) {
$('#two').css({
position: 'fixed',
top: '26px',
});
} else {
$('#two').css({
position: 'static'
});
}
if (currentScroll >= three) {
$('#three').css({
position: 'fixed',
top: '52px',
});
} else {
$('#three').css({
position: 'static'
});
}
if (currentScroll >= four) {
$('#four').css({
position: 'fixed',
top: '78px',
});
} else {
$('#four').css({
position: 'static'
});
}
});
body,
html {
height: 200%;
}
#one,
#two,
#three,
#four {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
position: absolute;
}
#one {
top: 0;
background-color: aqua;
}
#two {
top: 100%;
background-color: red;
}
#three {
top: 200%;
background-color: #0a0;
}
#four {
top: 300%;
background-color: #a05;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<body>
<div id="one">ONE</div>
<div id="two">TWO TWO</div>
<div id="three">THREE THREE THREE</div>
<div id="four">FOUR FOUR FOUR FOUR</div>
</body>

Related

What dose mean by "window.scrollY > 0"

window.addEventListener("scroll",()=>{
const header = document.querySelector("header");
header.classList.toggle("sticky", window.scrollY > 0);
})
I know about .toggle() method but not so clearly. Would some one please explain about toggle() and window.scrollY?
Scroll Down. scrollY property of the Window interface returns the number of pixels that the document is currently scrolled vertically.
window.addEventListener("scroll", (event) => {
document.querySelector("h1").textContent = this.scrollY;
document.querySelector("h2").textContent = ("sticky", window.scrollY > 0);
})
body {
width: 100vw;
height: 400vh;
}
h1 {
position: fixed;
top: 0;
}
h2 {
position: fixed;
top: 20%;
}
<h1>0</h1>
<h2></h2>

Add bootstrap class when scrolling the page using jquery

I have a problem with jQuery.
I want to add the fixed-top class (Bootstrap 4) when scrolling the page, but this is not the case.
jQuery(document).ready(function($){
var scroll = $(window).scrollTop();
if (scroll >= 500) {
$(".robig").addClass("fixed-top");
} else {
$(".robig").removeClass("fixed-top");
}
});
Can you see what I'm doing wrong?
Your scroll variable is never being updated. You need to add your code into a scroll event like so:
jQuery(document).ready(function($) {
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll >= 130) {
$(".robig").addClass("fixed-top");
} else {
$(".robig").removeClass("fixed-top");
}
});
});
body {
margin: 0;
}
.foo {
height: 140vh;
background: black;
}
.robig {
width: 100%;
height: 10vh;
background: lime;
}
.fixed-top {
position: fixed;
top: 0;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="foo"></div>
<div class="robig"></div>
<div class="foo"></div>
However, if you are trying to recreate a sticking effect, I suggest you use position: sticky as jquery isn't needed for this:
body {
margin: 0;
}
.foo {
height: 140vh;
background: black;
}
.robig {
width: 100%;
height: 10vh;
background: lime;
position: sticky;
top: 0;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="foo"></div>
<div class="robig">Stop at top</div>
<div class="foo"></div>
Your code run on page load only but you need to run your code in scroll event of window
$(window).scroll(function(){
var scroll = $(window).scrollTop();
if (scroll >= 500)
$(".robig").addClass("fixed-top");
else
$(".robig").removeClass("fixed-top");
});
Also you can simplify the code and use .toggleClass() instead
$(window).scroll(function(){
$(".robig").toggleClass("fixed-top", $(window).scrollTop() >= 500);
});
$(window).scroll(function(){
$(".robig").toggleClass("fixed-top", $(window).scrollTop() >= 500);
});
p {height: 500px}
.robig {
width: 100%;
background: red;
}
.fixed-top {
position: fixed;
top: 0;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<p>content</p>
<div class="robig">robig</div>
<p>content</p>
<p>content</p>
$(document).ready(function(){
var scroll = 0;
$(document).scroll(function() {
scroll = $(this).scrollTop();
if(scroll > 500) {
$(".robig").addClass("fixed-top");
} else {
$(".robig").removeClass("fixed-top");
}
});
});
You need to window scroll event. You can try below code
$(document).ready(function(){
$(window).scroll(function(){
if ($(this).scrollTop() >= 130)
{
$(".robig").addClass("fixed-top");
}
else
{
$(".robig").removeClass("fixed-top");
}
});
});

Fix Section when reaches top. Unfix when previous section is visible

I'm trying to stick a section to the top when it hits the top of the browser on scroll down, but I'd like to unstick it when the user scrolls back up and the previous section is back in view.
I'm detecting distance from top to section I'd like to stick, but once its at the top how do we detect user scrolling back up and previous section comes back into view.
My Codepen: https://codepen.io/omarel/pen/LeEjax
Snippet
$(window).on('scroll', function() {
var scrollTop = $(window).scrollTop();
sectionone = $('section.one').offset().top;
sectiontwo = $('section.two').offset().top;
sectiontwodistance = (sectiontwo - scrollTop);
sectiononedistance = (sectionone - scrollTop);
console.log(sectiononedistance);
if (sectiontwodistance < 1) {
$('section.two').addClass('fix');
}
});
html,
body {
width: 100%;
height: 100%;
}
section {
height: 100%;
border: 5px solid red;
position: absolute;
width: 100%;
}
section.one {
z-index: 1;
top: 0%;
}
section.two {
border: 5px solid green;
z-index: 2;
top: 100%;
}
section.three {
z-index: 3;
top: 200%;
}
section.fix {
position: fixed;
top: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<section class="one">
1
</section>
<section class="two">
2
</section>
<section class="three">
3
</section>
I would update your jQuery to the snippet below. It checks the position of section one against the height of the window and if less than, or equal to it removes the .fix class.
$(window).on('scroll', function() {
var scrollTop = $(window).scrollTop();
sectionone = $('section.one').offset().top;
sectiontwo = $('section.two').offset().top;
sectiontwodistance = (sectiontwo - scrollTop);
sectiononedistance = (sectionone - scrollTop);
console.log(sectiononedistance);
if (sectiontwodistance < 1) {
$('section.two').addClass('fix');
}
if (Math.abs(sectiononedistance) <= $(window).height()) {
$('section.two').removeClass('fix');
}
});

How to merge 2 different scripts

I use this to position my div:
$(document).ready(function (){
$(window).resize(function (){
$('.classname').css({
position:'absolute',
left: ($(window).width() - $('.classname').outerWidth())/2,
});
});
$(window).resize();
});
but after scrolling down, i want to stick on the top, so withouth positioning I use this:
$(window).scroll(function(){
if($(document).scrollTop() > 150){
$('.class name').addClass('shrink');
}
else{
$('.class name').removeClass('shrink');
}
});
here is the css for shrink:
.shrink{
top: 0;
left: 0;
position: fixed;
width: 100%;
}
Can someone help me, how to merge the two scripts?
thanks
don't know if i understand you correctly, but you can try this:
CSS
.classname{
top: 0;
position: absolute;
}
.classname.shrink{
left: 0 !important;
position: fixed;
width: 100%;
}
JS
$(document).ready(function (){
$(window).resize(function (){
$('.classname').css({
left: ($(window).width() - $('.classname').outerWidth())/2,
});
});
$(window).scroll(function(){
if($(document).scrollTop() > 150){
$('.classname').addClass('shrink');
}
else{
$('.classname').removeClass('shrink');
}
});
$(window).resize();
});

how to create a sliding menu which will fill the window width except by puller button width?

I am trying to create a sliding menu which will fill the window width minus the puller button width. I want the menu out of the window when web page load and there is a button which will go left when the page loads. When user clicks on the button the menu should come to window and button goes right.
I have created an animation video here which will show you what I want.
In the jsfiddle the menu just fades out, But I want the menu to slide from left to right when clicked on button with .puller class.
See the code at jsfiddle
Demo on jsfiddle
$(document).ready(function() {
var stickyNavTop = ($('.container')).offset().top;
var stickyNav = function(){
var scrollTop = $(window).scrollTop();
if (scrollTop > stickyNavTop) {
$('.container').addClass('fixed');
} else {
$('.container').removeClass('fixed');
}
};
stickyNav();
$(window).scroll(function() {
stickyNav();
}).resize(function() {
stickyNav();
}).load(function() {
stickyNav();
});
$(".dropdown").click(function() {
$(".dpitem").slideToggle(300);
});
var calcWidth = function() {
var pullerDimensions = $('.puller').width();
$('#cpcc,.dpitem').width($(window).width() - pullerDimensions);
}
$(document).ready(function() {
calcWidth();
});
$(window).resize(function() {
calcWidth();
}).load(function() {
calcWidth();
});
var cPcc = document.getElementById ("cpcc");
var cpHeight = function() {
var cpBtnHolder = $(cPcc).height();
$('.content').css("padding-top",cpBtnHolder);
}
setInterval(function() {
cpHeight();
calcPHeight();
pp();
}, 0)
var calcPHeight = function() {
var toolsDimensions = $('#cpcc').height();
$('.puller').height(toolsDimensions);
$('.puller').css("line-height",toolsDimensions +"px");
}
$(document).ready(function() {
calcPHeight();
});
$(window).resize(function() {
calcPHeight();
}).load(function() {
calcPHeight();
});
var Pwidth = $('#cpcc').width();
var PSpce = $(window).width()-Pwidth;
$(".puller").click(function() {
$(".container").toggle( function() {
$(".container").css({
transform: "translate3d("+"-"+Pwidth+"px, 0, 0)"
});
}, function () {
$(".container").css({
transform: "translate3d(-0, 0, 0)"
});
});
});
});
Calc is your friend. You can use that along with 'transition' to achieve the intended effect. Check out this simplified example.
http://codepen.io/anon/pen/gPBQOb
Good practice is to toggle a class which will override the position property in this case left. It should also toggle your chevron image to point left and right.
Your example is using a lot of js calculations and has to recalculate with window size changes. This example uses js only to toggle a css class on click and the rest in managed purely with css. Much simpler in my opinion.
HTML
<div class="maincontent"></div>
<div class="menu">
<div class="button"></div>
</div>
CSS
.maincontent{
background-color: green;
height: 2000px;
width: 100%;
}
.menu{
background-color: red;
width: 100%;
height: 200px;
position: fixed;
top: 0px;
left: 0px;
transition: left 1s;
}
.menu.collapse{
left: calc(-100% + 30px)
}
.button{
background-color: yellow;
height: 100%;
width: 30px;
position: absolute;
right: 0px;
}
JS
$('.button').click(
function(){
$('.menu').toggleClass('collapse')
})

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