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How do I bring the block up to the header by scrolling when the button is clicked?

I'm trying to make it so that when you click on the button with the class .booking__button, the block scrolls up under the header. Position should not change, only scroll. This is done so that the search results of the booking module, which, would be visible to the user. I found the code that does the scrolling, but it works with the exact number, now 100px, but you understand that this distance will be different for everyone, depending on the height of the screen.
document.querySelector('.booking__button').addEventListener('click', () => {
window.scrollTo(0, 100);
});
body {
margin: 0;
}
.header {
position: fixed;
top: 0;
left: 0;
right: 0;
height: 60px;
background: #002164;
}
.hero {
min-height: calc(100vh - 100px);
background: #fff;
}
.booking__module {
display: flex;
justify-content: center;
align-items: center;
background: #BC0B3C;
}
.booking__search {
height: 600px;
background: #ccc;
}
.booking__button {
height: 20px;
margin: 40px;
}
.others {
height: 200vh;
}
<header class="header"></header>
<main class="hero"></main>
<section class="booking">
<div class="booking__module">
<button class="booking__button">booking</button>
</div>
<div class="booking__search"></div>
</section>
<section class="others"></section>

One approach is below, with explanatory comments in the code. Note that while I changed the background-color of the <header> element, that's simply to visualise the functionality and is not at all required:
// we pass a reference to the Event Object ('evt') to the function:
document.querySelector('.booking__button').addEventListener('click', (evt) => {
// we retrieve the closest ancestor <section> element of the element
// to which the event-handler is bound, and retrieve the 'top' property
// of its bounding-client rect:
let {top} = evt.currentTarget.closest('section').getBoundingClientRect();
// we then scroll to that value:
window.scrollTo(0, top);
});
body {
margin: 0;
}
.header {
position: fixed;
top: 0;
left: 0;
right: 0;
height: 60px;
/*background: #002164;*/
background-color: hsl(200deg 70% 70% / 0.4);
}
.hero {
min-height: calc(100vh - 100px);
background: #fff;
}
.booking__module {
display: flex;
justify-content: center;
align-items: center;
background: #BC0B3C;
}
.booking__search {
height: 600px;
background: #ccc;
}
.booking__button {
height: 20px;
margin: 40px;
}
.others {
height: 200vh;
}
<header class="header"></header>
<main class="hero"></main>
<section class="booking">
<div class="booking__module">
<button class="booking__button">booking</button>
</div>
<div class="booking__search"></div>
</section>
<section class="others"></section>
JS Fiddle demo.
References:
Element.closest().
Element.getBoundingClientRect().
Event.
Event.currentTarget.
EventTarget.addEventListener().
Window.scrollTo.

How to achieve the same function of position:sticky using jQuery or JavaScript?

I'm having a hard time figuring out why the code below doesn't work as expected.
What I'm trying to achieve is same functionality with position:sticky whereas when the scrolled reaches the top of the #second-header then fixes its position below the #header which is also fixed, however, the height of the #header is unknown which is I believe can be calculated using the function outerHeight(true) on JQuery.
Then after reaching out to the bottom of the #second-header-container, remove the fixed position of #second-header turning it back to normal position.
Due to browser compatibility issues and other customization, I cannot simply use the position:sticky of css.
It looks like my logic is wrong, and I need help.
jQuery(document).ready(function(){
var $document = jQuery(document);
var header = jQuery('#header');
var second_header = jQuery('#second-header-container').find('#second-header');
var second_header_container = jQuery('#second-header-container');
var second_header_offset = second_header.offset().top;
var second_header_container_offset = second_header_container.offset().top;
jQuery(window).scroll(function(){
var top_margin = header.outerHeight(true);
var second_header_height = second_header.outerHeight(true);
var second_header_container_height = second_header_container.outerHeight(true);
if( jQuery(window).scrollTop() > (second_header_offset - second_header_height) && jQuery(window).scrollTop() < second_header_container_height) {
second_header.addClass('fixer');
second_header.css({position:'fixed', top:top_margin, 'z-index':'999999'});
} else {
second_header.removeClass('fixer');
second_header.css({position:'relative', top:'0px', 'z-index':'0'});
}
});
});
*{
color: #FFFFFF;
padding: 0;
margin: 0;
}
.fixer{
position: fixed;
width: 100%;
}
#header, .banner, #second-header, .contents{
padding: 5px;
}
#header{
position: fixed;
width: 100%;
height: 74px;
z-index: 99999;
background-color: #000000;
}
.banner{
padding-top: 84px;
height: 200px;
background-color: #583E5B;
}
#second-header-container{
min-height: 300px;
background-color: #775F5E;
}
#second-header{
padding-bottom: 10px;
padding-top: 10px;
background-color: #4C3D3C;
}
.contents{
min-height: 200px;
background-color: #97A36D;
}
.footer{
background-color: #80A379;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<header id="header">HEADER</header>
<div class="banner">BANNER</div>
<div id="second-header-container">
<div id="second-header">SECOND-HEADER</div>
<!--Other contents and elements...-->
</div>
<div class="contents">OTHER...</div>
<footer class="contents footer">FOOTER</footer>

To achieve this you need first check if the scroll height is near the second div header and within the height of the second div. Then add a class that make it stick below the main header. I have created a sticky class and added it while scrolling conditions are met.
Please check below code
jQuery(document).ready(function() {
var headerHeight = $('#header').outerHeight(true);
var secondHeaderContainer = $('#second-header-container');
const secondHeaderTopPos = secondHeaderContainer.offset().top;
const secondHeaderContainerHeight = $(secondHeaderContainer).height();
$(window).scroll(function() {
const scrollTop = $(this).scrollTop();
const secondContainerHeightEnd = secondHeaderContainerHeight + secondHeaderTopPos - $('#second-header').height() - headerHeight;
if (((secondHeaderTopPos - headerHeight) <= scrollTop) && (secondContainerHeightEnd >= scrollTop)) {
$('#second-header').addClass('sticky').css('top', headerHeight);
} else {
$('#second-header').removeClass('sticky');
}
});
});
* {
color: #FFFFFF;
padding: 0;
margin: 0;
}
.sticky {
position: fixed;
width: 100%;
top: 0;
left: 0;
}
.fixer {
position: fixed;
width: 100%;
}
#header,
.banner,
#second-header,
.contents {
padding: 5px;
}
#header {
position: fixed;
width: 100%;
height: 74px;
z-index: 99999;
background-color: #000000;
}
.banner {
padding-top: 84px;
height: 200px;
background-color: #583E5B;
}
#second-header-container {
min-height: 300px;
background-color: #775F5E;
}
#second-header {
padding-bottom: 10px;
padding-top: 10px;
background-color: #4C3D3C;
}
.contents {
min-height: 200px;
background-color: #97A36D;
}
.footer {
background-color: #80A379;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<header id="header">HEADER</header>
<div class="banner">BANNER</div>
<div id="second-header-container">
<div id="second-header">SECOND-HEADER</div>
<!--Other contents and elements...-->
</div>
<div class="contents">OTHER...</div>
<footer class="contents footer">FOOTER</footer>

How to put scroll bar in vertical position and also how to move images with up and down arrows?

I am having difficulty to put the scroll bar in a vertical position instead of horizontal. Also, I want to slide images with up
and down arrow key of the keyboard. Please help me I have an
assignment due. I'll appreciate your help.
For more information please check my code into jsfiddle https://jsfiddle.net/mgj7hb0k/
The code below is from HTML file
<div class="slider-wrap">
<div class="slider" id="slider">
<div class="holder">
<div class="slide" id="slide-0"><span class="temp">74°</span></div>
<div class="slide" id="slide-1"><span class="temp">64°</span></div>
<div class="slide" id="slide-2"><span class="temp">82°</span></div>
</div>
</div>
<nav class="slider-nav">
Slide 0
Slide 1
Slide 2
</nav>
</div>
CSS file. I have added some styles into separate css file.The "slider" (visual container) and the slides need to have explicity the same size. We'll use pixels here but you could make it work with anything.
#import url(https://fonts.googleapis.com/css?family=Josefin+Slab:100);
.slider-wrap {
width: 300px;
height: 500px;
margin: 20px auto;
}
.slider {
overflow-x: scroll;
}
.holder {
width: 300%;
}
.slide {
float: left;
width: 300px;
height: 500px;
position: relative;
background-position: -100px 0;
}
.temp {
position: absolute;
color: white;
font-size: 100px;
bottom: 15px;
left: 15px;
font-family: 'Josefin Slab', serif;
font-weight: 100;
}
#slide-0 {
background-image: url(http://farm8.staticflickr.com/7347/8731666710_34d07e709e_z.jpg);
}
#slide-1 {
background-image: url(http://farm8.staticflickr.com/7384/8730654121_05bca33388_z.jpg);
}
#slide-2 {
background-image: url(http://farm8.staticflickr.com/7382/8732044638_9337082fc6_z.jpg);
}
.slide:before {
content: "";
position: absolute;
bottom: 0;
left: 0;
width: 100%;
height: 40%;
background: linear-gradient(transparent, black);
}
.slider-nav {
text-align: center;
margin: 10px 0 0 0;
}
.slider-nav a {
width: 10px;
height: 10px;
display: inline-block;
background: #ddd;
overflow: hidden;
text-indent: -9999px;
border-radius: 50%;
}
.slider-nav a.active {
background: #999;
}
We're going to use jQuery here because we love life. Our goal is the adjust the background-position of the slides as we scroll. We can set background-position in percentages in CSS, but that alone doesn't do the cool hide/reveal more effect we're looking for. Based the amount scrolled (which we can measure in JavaScript), we'll adjust the background-position. Alone, that would look something like this:
Js file
var slider = {
// Not sure if keeping element collections like this
// together is useful or not.
el: {
slider: $("#slider"),
allSlides: $(".slide"),
sliderNav: $(".slider-nav"),
allNavButtons: $(".slider-nav > a")
},
timing: 800,
slideWidth: 300, // could measure this
// In this simple example, might just move the
// binding here to the init function
init: function() {
this.bindUIEvents();
},
bindUIEvents: function() {
// You can either manually scroll...
this.el.slider.on("scroll", function(event) {
slider.moveSlidePosition(event);
});
// ... or click a thing
this.el.sliderNav.on("click", "a", function(event) {
slider.handleNavClick(event, this);
});
// What would be cool is if it had touch
// events where you could swipe but it
// also kinda snapped into place.
},
moveSlidePosition: function(event) {
// Magic Numbers =(
this.el.allSlides.css({
"background-position": $(event.target).scrollLeft()/6-100+ "px 0"
});
},
handleNavClick: function(event, el) {
event.preventDefault();
var position = $(el).attr("href").split("-").pop();
this.el.slider.animate({
scrollLeft: position * this.slideWidth
}, this.timing);
this.changeActiveNav(el);
},
changeActiveNav: function(el) {
this.el.allNavButtons.removeClass("active");
$(el).addClass("active");
}
};
slider.init();

I am not able to add and remove the classes

My Code:
window.addEventListener('scroll', scrollWhere);
function scrollWhere(e) {
var windowScroll = $(window).scrollTop();
var idScroll = $('.me').offset().top;
var height = $("#half-who").height();
if (windowScroll > idScroll) {
$('.me').addClass('me-fixed');
} else {
$('.me').removeClass('me-fixed');
}
}
I want to add a class when the scroll is past a certain point and remove it when is smaller than that certain point.

Get your idScroll value outside scrollWhere function as because it re-initiate calculation again and again and returns different values each time as because it has a fixed position. check below snippet for reference.
window.addEventListener('scroll', scrollWhere);
var idScroll = $('.me').offset().top;
function scrollWhere(e) {
var windowScroll = $(window).scrollTop();
//var height = $("#half-who").height();
if (windowScroll > idScroll) {
$('.me').addClass('me-fixed');
} else {
$('.me').removeClass('me-fixed');
}
}
.container {
height: 300vh;
width: 100%;
background-color: grey;
padding: 0;
margin: 0;
}
.content {
height: 100px;
width: 100%;
background-color: cyan;
}
.me {
height: 50px;
width: 100%;
background-color: red;
}
.me-fixed {
position: fixed;
top: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
<div class="content"></div>
<div class="me"></div>
</div>

Here's a simple example to add a class when scroll passing a certain point. Hope you can get an idea. >>> JSFiddle
$(window).scroll(function(){
var winH = $(window).scrollTop();
var ruler = $('.ruler').position().top;
if(ruler < winH){
$('.nav').addClass('me-fixed');
}
else{
$('.nav').removeClass('me-fixed');
}
});
body{
height: 1500px;
}
.nav{
height: 50px;
background: #a1bfbe;
color: #000;
width: 100%;
position: relative;
top: 250px;
text-align: center;
}
.nav.me-fixed{
background: #c2debf;
}
p{
font-size: 20px;
display: none;
}
.me-fixed p{
display: block;
}
.ruler{
position: fixed;
top: 150px;
border-bottom: 1px solid red;
width: 100%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="nav">
<p>
Fixed
</p>
</div>
<div class="ruler">
</div>
Also if you can provide the html and css structure, it will be easy to identify the issue.

Sliding images inward from different direction

I would like to have the first image slide from left to right. The second image slides from left to right, and the third image will be coming from the bottom to top. I managed to slide the first image from left to right with the answers I found here on stackoverflow. But when I modified the script & css for the other images, they're not sliding. I am not so knowledgeable in javascript.
$(document).ready(function() {
function animateImgs() {
$('ul.slide1 li:not(.visible)').first().animate({
'margin-right': '500px'
}, 2000, function() {
$(this).addClass('visible');
animateImgs();
});
}
animateImgs();
});
.content {
position: relative;
margin: 0 auto;
top: 0;
left: 0;
width: 500px;
height: 500px;
border: 1px solid #000;
overflow: hidden;
}
img {
width: 100%;
height: 100%;
border-radius: 50%;
position: absolute;
}
.img1 {
max-width: 300px;
max-height: 300px;
z-index: 2;
}
.img2 {
max-width: 260px;
max-height: 260px;
z-index: 3;
left: 200px;
top: 100px;
}
.img3 {
max-width: 200px;
max-height: 200px;
z-index: 4;
left: 65px;
top: 235px;
}
/* -------------------------------------------------------------------- */
ul {
padding: 0;
margin: 0;
overflow: hidden;
}
ul.slide1 li {
float: right;
margin: 0 10px 0 0;
margin-right: 9999px;
list-style-type: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<div class="content">
<ul class="slide1">
<li>
<img src="http://www.pngmart.com/files/4/Chrysanthemum-Transparent-Background.png" class="img1 slideLeft" />
</li>
</ul>
<img src="http://www.estanciavitoria.com/en/images/sobre_planta.png" class="img2 slideRight" />
<ul class="slide3">
<li>
<img src="https://s-media-cache-ak0.pinimg.com/originals/4d/09/e4/4d09e455070957363b2c0660a0d8cfef.png" class="img3 slideUp" />
</li>
</ul>
</div>

Steps:
Define a container element with class slideContent
Within container define slide elements with class slide
Specify sliding direction to slide elements with either slideUp, slideDown, slideLeft or slideRight
Specify data-margin to place element in container by sliding
Do not define following in CSS (instead use data-margin attribute in slide element):
margin-bottom for slideUp element
margin-top for slideDown element
margin-right for slideLeft element
margin-left for slideRight element
$(document).ready(function() {
function animateImgs() {
// Animation duration
var duration = 200;
// Get element reference needs to be shown
var el = $('.slideContent .slide:not(.visible)').first();
if (el.length === 0) {
console.log('No more elements found');
return;
}
// Read the margin value
var marginValue = el.attr('data-margin');
// Direction
var marginDirection,
animationProp = {};
// Animate now
if (el.hasClass('slideLeft')) {
marginDirection = 'margin-right';
} else if (el.hasClass('slideRight')) {
marginDirection = 'margin-left';
} else if (el.hasClass('slideUp')) {
marginDirection = 'margin-bottom'
} else if (el.hasClass('slideDown')) {
marginDirection = 'margin-top'
}
if (typeof marginDirection === 'undefined') {
// No valid animation direction defined
console.log('Invalid animation direction');
return;
}
animationProp[marginDirection] = marginValue;
el.animate(animationProp, duration, function() {
$(this).addClass('visible');
animateImgs();
});
}
animateImgs();
});
.slideContent {
position: relative;
margin: 0 auto;
top: 0;
left: 0;
width: 500px;
height: 500px;
border: 1px solid #000;
overflow: hidden;
}
.slideContent .slide {
position: absolute;
}
.slideContent .slideLeft {
right: -100%
}
.slideContent .slideRight {
left: -100%
}
.slideContent .slideUp {
bottom: -100%
}
img {
width: 100%;
height: 100%;
border-radius: 50%;
}
.img1 {
max-width: 300px;
max-height: 300px;
}
.img2 {
max-width: 260px;
max-height: 260px;
top: 100px;
}
.img3 {
max-width: 200px;
max-height: 200px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="slideContent">
<img src="http://www.pngmart.com/files/4/Chrysanthemum-Transparent-Background.png" data-margin="500px" class="img1 slide slideLeft" />
<img src="http://www.estanciavitoria.com/en/images/sobre_planta.png" data-margin="600px" class="img2 slide slideRight" />
<img src="https://s-media-cache-ak0.pinimg.com/originals/4d/09/e4/4d09e455070957363b2c0660a0d8cfef.png" data-margin="600px" class="img3 slide slideUp" />
</div>