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How Can I make this touch Slider move atomically?

I am trying to make this touch slider, which move between slides automatically.
I tried many ways but nothing helped, this bellow is my Code:
.slider-container {
height: 100vh;
display: inline-flex;
overflow: hidden;
scrollbar-width: none;
transform: translateX(0);
will-change: transform;
transition: transform 0.3s ease-out;
cursor: grab;
}
.slide{
max-height: 100vh;
width: 100vw;
display: flex;
align-items: center;
justify-content: center;
padding: 1rem;
}
<div class="slider-container">
<div class="slide">
<img src="pics/slider/127616685-multi-colored-samples-of-marble-granite-and-travertine-chips-and-pebbles-for-landscape-design-close-.jpg"/>
</div>
<div class="slide">
<img src="pics/slider/1554689647283.jpg"/>
</div>
</div>

Just add this code at the bottom of your JS code.
This code changes the value of currentTranslate every 1 second and then calls the touchEnd(); function.
**I added the variable "loop" if the value is true when the last slide is reached... the script will call the first one again and so on indefinitely. If it has a value of false when the last slide is reached, the interval will be removed. And scrolling the slides will stop.
var loop = true; //<-- "true" Loop or "false" Stop on the End
var slideShw = setInterval(() => {
currentTranslate = currentTranslate - 101;
touchEnd();
if (currentIndex === slides.length - 1) {
if (loop) {
currentIndex -= slides.length;
} else {
stop_slideShw();
}
}
}, 1000);
function stop_slideShw() {
clearInterval(slideShw);
}
Example:
// get our elements
const slider = document.querySelector('.slider-container'),
slides = Array.from(document.querySelectorAll('.slide'))
// set up our state
let isDragging = false,
startPos = 0,
currentTranslate = 0,
prevTranslate = 0,
animationID,
currentIndex = 0
// add our event listeners
slides.forEach((slide, index) => {
const slideImage = slide.querySelector('img')
// disable default image drag
slideImage.addEventListener('dragstart', (e) => e.preventDefault())
// touch events
slide.addEventListener('touchstart', touchStart(index))
slide.addEventListener('touchend', touchEnd)
slide.addEventListener('touchmove', touchMove)
// mouse events
slide.addEventListener('mousedown', touchStart(index))
slide.addEventListener('mouseup', touchEnd)
slide.addEventListener('mousemove', touchMove)
slide.addEventListener('mouseleave', touchEnd)
})
// make responsive to viewport changes
window.addEventListener('resize', setPositionByIndex)
// // prevent menu popup on long press
// window.oncontextmenu = function (event) {
// event.preventDefault()
// event.stopPropagation()
// return false
// }
function getPositionX(event) {
return event.type.includes('mouse') ? event.pageX : event.touches[0].clientX
}
// use a HOF so we have index in a closure
function touchStart(index) {
return function (event) {
currentIndex = index
startPos = getPositionX(event)
isDragging = true
animationID = requestAnimationFrame(animation)
slider.classList.add('grabbing')
}
}
function touchMove(event) {
if (isDragging) {
const currentPosition = getPositionX(event)
currentTranslate = prevTranslate + currentPosition - startPos
}
}
var movedBy;
function touchEnd() {
cancelAnimationFrame(animationID)
isDragging = false
movedBy = currentTranslate - prevTranslate
// if moved enough negative then snap to next slide if there is one
if (movedBy < -100 && currentIndex < slides.length - 1) currentIndex += 1
// if moved enough positive then snap to previous slide if there is one
if (movedBy > 100 && currentIndex > 0) currentIndex -= 1
setPositionByIndex()
slider.classList.remove('grabbing')
}
function animation() {
setSliderPosition()
if (isDragging) requestAnimationFrame(animation)
}
function setPositionByIndex() {
currentTranslate = currentIndex * -window.innerWidth
prevTranslate = currentTranslate
setSliderPosition()
}
function setSliderPosition() {
slider.style.transform = `translateX(${currentTranslate}px)`
}
// NEW LINES /////////////////////////////////////////
var loop = true; //<-- "true" Loop or "false" Stop on the End
var slideShw = setInterval(() => {
currentTranslate = currentTranslate - 101;
touchEnd();
if (currentIndex === slides.length - 1) {
if (loop) {
currentIndex -= slides.length;
} else {
stop_slideShw();
}
}
}, 1000);
function stop_slideShw() {
clearInterval(slideShw);
}
/* :root {
--shadow: rgba(0, 0, 0, 0.8)
}
* {
box-sizing: border-box;
padding: 0;
margin: 0;
}
*/
.slider-container {
height: 100vh;
display: inline-flex;
overflow: hidden;
scrollbar-width: none;
transform: translateX(0);
will-change: transform;
transition: transform 0.3s ease-out;
cursor: grab;
}
.slide {
max-height: 100vh;
width: 100vw;
display: flex;
align-items: center;
justify-content: center;
padding: 1rem;
}
#media(min-width: 1200px) {
.slide {
padding: 3rem;
}
}
.slide img {
max-width: 100%;
max-height: 100%;
transition: transform 0.3s ease-in-out;
box-shadow: 5px 5px 50px -1px var(--shadow);
border-radius: 4px;
user-select: none;
}
.grabbing {
cursor: grabbing;
}
.grabbing .slide img {
transform: scale(0.9);
box-shadow: 5px 5px 40px -1px var(--shadow);
}
<div class="slider-container">
<div class="slide">
<img
src="https://images.pexels.com/photos/145939/pexels-photo-145939.jpeg?auto=compress&cs=tinysrgb&dpr=3&h=750&w=1260" />
</div>
<div class="slide">
<img
src="https://images.pexels.com/photos/47547/squirrel-animal-cute-rodents-47547.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" />
</div>
<div class="slide">
<img
src="https://thumbor.forbes.com/thumbor/960x0/https%3A%2F%2Fspecials-images.forbesimg.com%2Fimageserve%2F5faad4255239c9448d6c7bcd%2FBest-Animal-Photos-Contest--Close-Up-Of-baby-monkey%2F960x0.jpg%3Ffit%3Dscale" />
</div>
</div>

To move your slider automatically you should use the animation property.

Its difficult to work on slider without Javascript. I am giving some fresh codes, you can check them and rewrite your codes accordingly.
var photos = ["1.png","2.png","3.png"]
var time = 3000;
var imgTag = document.querySelector("img")
var count = 0;
function changeImg() {
document.slide.src = photos[count];
count++;
if(count==3){
count=0;
imgTag.src = photos[count];
}
else{
imgTag.src = photos[count];
}
console.log("lap");
setTimeout("changeImg()",time);
}
window.onload = changeImg;
function next(){
count++;
time=3000;
if(count==3){
count=0;
imgTag.src = photos[count];
}
else{
imgTag.src = photos[count];
}
console.log("next");
}
function prev(){
count--;
time=3000;
if(count==-1){
count=2;
imgTag.src = photos[count];
}
else{
imgTag.src = photos[count];
}
console.log("prev");
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Stack Overflow</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<button onclick="prev()">Prev</button>
<img src="1.png" name="slide" alt="" height="300" width="300">
<button onclick="next()">Next</button>
<script type="text/javascript" src="index.js"></script>
</body>
</html>
Put any 3 images named "1.png" "2.png" "3.png". And then run the code. Hopefully it will run, and you will get an idea. Here I have used a setTimeout function that will fire up after 3 seconds to change your slides.
Thank you.

What could be the bare minimum steps to animate the following carousel implementation?

I am making a vanilla js carousel. I have laid out basic previous and next functionality using js along with html and css.
Now I tried to use css-animations (keyframes) to do left and right slide-in/slide-out animations but the code became messy for me. So here I am asking that what minimal changes would be needed to get the same animation effects in this implementation ?
Will you go for pure JS based or pure CSS based or a mix to do the same ?
My goal is get proper animation with minimal code.
(function () {
let visibleIndex = 0;
let carousalImages = document.querySelectorAll(".carousal__image");
let totalImages = [...carousalImages].length;
function makeNextVisible() {
visibleIndex++;
if (visibleIndex > totalImages - 1) {
visibleIndex = 0;
}
resetVisible();
renderVisible();
}
function makePrevVisible() {
visibleIndex--;
if (visibleIndex < 0) {
visibleIndex = totalImages - 1;
}
resetVisible();
renderVisible();
}
function resetVisible() {
for (let index = 0; index < totalImages; index++) {
carousalImages[index].className = "carousal__image";
}
}
function renderVisible() {
carousalImages[visibleIndex].className = "carousal__image--visible";
}
function renderCarousel({ autoplay = false, autoplayTime = 1000 } = {}) {
if (autoplay) {
[...document.querySelectorAll("button")].forEach(
(btn) => (btn.style.display = "none")
);
setInterval(() => {
makeNextVisible();
}, autoplayTime);
} else renderVisible();
}
renderCarousel();
// Add {autoplay:true} as argument to above to autplay the carousel.
this.makeNextVisible = makeNextVisible;
this.makePrevVisible = makePrevVisible;
})();
.carousal {
display: flex;
align-items: center;
}
.carousal__wrapper {
width: 500px;
height: 400px;
}
.carousal__images {
display: flex;
overflow: hidden;
list-style-type: none;
padding: 0;
}
.carousal__image--visible {
position: relative;
}
.carousal__image {
display: none;
}
<div class='carousal'>
<div class='carousal__left'>
<button onclick='makePrevVisible()'>Left</button>
</div>
<section class='carousal__wrapper'>
<ul class='carousal__images'>
<li class='carousal__image'>
<img src='https://fastly.syfy.com/sites/syfy/files/styles/1200x680/public/2018/03/dragon-ball-super-goku-ultra-instinct-mastered-01.jpg?offset-x=0&offset-y=0' alt='UI Goku' / width='500' height='400'/>
</li>
<li class='carousal__image'>
<img src='https://www.theburnin.com/wp-content/uploads/2019/01/super-broly-3.png' alt='Broly Legendary' width='500' height='400'/>
</li>
<li class='carousal__image'>
<img src='https://lh3.googleusercontent.com/proxy/xjEVDYoZy8-CTtPZGsQCq2PW7I-1YM5_S5GPrAdlYL2i4SBoZC-zgtg2r3MqH85BubDZuR3AAW4Gp6Ue-B-T2Z1FkKW99SPHwAce5Q_unUpwtm4' alt='Vegeta Base' width='500' height='400'/>
</li>
<li class='carousal__image'>
<img src='https://am21.mediaite.com/tms/cnt/uploads/2018/09/GohanSS2.jpg' alt='Gohan SS2' width='500' height='400'/>
</li>
</ul>
</section>
<div class='carousal__right'>
<button onclick='makeNextVisible()'>Right</button>
</div>
</div>
Updated codepen with feedback from the below answers and minor additional functionalities = https://codepen.io/lapstjup/pen/RwoRWVe

I think the trick is pretty simple. ;)
You should not move one or two images at the same time. Instead you should move ALL images at once.
Let's start with the CSS:
.carousal {
position: relative;
display: block;
}
.carousal__wrapper {
width: 500px;
height: 400px;
position: relative;
display: block;
overflow: hidden;
margin: 0;
padding: 0;
}
.carousal__wrapper,
.carousal__images {
transform: translate3d(0, 0, 0);
}
.carousal__images {
position: relative;
top: 0;
left: 0;
display: block;
margin-left: auto;
margin-right: auto;
}
.carousal__image {
float: left;
height: 100%;
min-height: 1px;
}
2nd step would be to calculate the maximum width for .carousal__images. For example in your case 4 * 500px makes 2000px. This value must be added to your carousal__images as part of the style attribute style="width: 2000px".
3rd step would be to calculate the next animation point and using transform: translate3d. We start at 0 and want the next slide which means that we have slide to the left. We also know the width of one slide. So the result would be -500px which also has to be added the style attribute of carousal__images => style="width: 2000px; transform: translate3d(-500px, 0px, 0px);"
That's it.
Link to my CodePen: Codepen for Basic Carousel with Autoplay

Try this. First stack all the images next to each other in a div and only show a single image at a time by setting overflow property to hidden for the div. Next, add event listeners to the buttons. When a bottom is clicked, the div containing the images is translated by -{size of an image} * {image number} on the x axis. For smooth animation, add transition: all 0.5s ease-in-out; to the div.
When someone clicks left arrow on the first image, the slide should display the last image. So for that counter is set to {number of images} - 1 and image is translated to left size * counter px.
For every click on the right arrow, the counter is incremented by 1 and slide is moved left. For every click on the left arrow, the counter is decremented by 1.
Slide.style.transform = "translateX(" + (-size * counter) + "px)"; this is the condition which is deciding how much the slide should be translated.
const PreviousButton = document.querySelector(".Previous-Button");
const NextButton = document.querySelector(".Next-Button");
const Images = document.querySelectorAll("img");
const Slide = document.querySelector(".Images");
const size = Slide.clientWidth;
var counter = 0;
// Arrow Click Events
PreviousButton.addEventListener("click", Previous);
NextButton.addEventListener("click", Next);
function Previous() {
counter--;
if (counter < 0) {
counter = Images.length - 1;
}
Slide.style.transform = "translateX(" + (-size * counter) + "px)";
}
function Next() {
counter++;
if (counter >= Images.length) {
counter = 0;
}
Slide.style.transform = "translateX(" + (-size * counter) + "px)";
}
* {
margin: 0px;
padding: 0px;
box-sizing: border-box;
}
.Container {
width: 60%;
margin: 0px auto;
margin-top: 90px;
overflow: hidden;
position: relative;
}
.Container .Images img {
width: 100%;
}
.Images {
transition: all 0.5s ease-in-out;
}
.Container .Previous-Button {
position: absolute;
background: transparent;
border: 0px;
outline: 0px;
top: 50%;
left: 20px;
transform: translateY(-50%);
filter: invert(80%);
z-index: 1;
}
.Container .Next-Button {
position: absolute;
background: transparent;
border: 0px;
outline: 0px;
top: 50%;
right: 20px;
transform: translateY(-50%);
filter: invert(80%);
z-index: 1;
}
.Container .Images {
display: flex;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link href="https://fonts.googleapis.com/css2?family=Cabin&family=Poppins&display=swap" rel="stylesheet">
<link rel="stylesheet" href="style.css">
<title>Carousel</title>
</head>
<body>
<div class="Container">
<button class="Previous-Button">
<svg style = "transform: rotate(180deg);" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path d="M8.122 24l-4.122-4 8-8-8-8 4.122-4 11.878 12z"/></svg>
</button>
<button class="Next-Button">
<svg xmlns="http://www.w3.org/2000/svg" width = "24" height = "24" viewBox = "0 0 24 24"><path d="M8.122 24l-4.122-4 8-8-8-8 4.122-4 11.878 12z"/></svg>
</button>
<div class="Images">
<img src="https://source.unsplash.com/1280x720/?nature">
<img src="https://source.unsplash.com/1280x720/?water">
<img src="https://source.unsplash.com/1280x720/?rock">
<img src="https://source.unsplash.com/1280x720/?abstract">
<img src="https://source.unsplash.com/1280x720/?nature">
<img src="https://source.unsplash.com/1280x720/?trees">
<img src="https://source.unsplash.com/1280x720/?human">
<img src="https://source.unsplash.com/1280x720/?tech">
</div>
</div>
<script src="main.js"></script>
</body>
</html>

image script not displaying

I have this code and the problem is the "main" and "left/right" image are not being displayed. I have gone through the entire logic and can't figure out what is wrong.
The code works if I replace else with else if(flag===1 && child[I].id=="left" || child[I].id=="right")
Expected output:
movement of mouse should change the image, this change is determined by the height of the <body> element.
Output getting:
only one image is displayed and does not changes no mater where I move my mouse.
[ also changing event from "mouseover" to "mousemove" does not help ]
so why isn't it working when I remove it, shouldn't at least "main" work??
PS: I'm unable to provide an image, please find another one.
'use strict';
(function() {
var wlen = screen.availWidth;
var whet = screen.availHeight;
var last = {};
var chk = 3;
var eye = document.getElementsByClassName("eyes");
var build = function(ele) {
if (ele.previousElementSibling !== null) ele.previousElementSibling.style = "none";
last = ele.style;
last.display = "block";
}
var anite = function() {
var x = event.screenX;
var y = event.screenY;
last.display = "none";
var child;
var flag;
y < whet / 3 ? flag = 2 : (y > 2 * whet / 3) ? flag = 0 : flag = 1;
x < wlen / 2 ? child = eye[1].childNodes : child = eye[0].childNodes;
for (let i = 0; i < child.length; i++) {
if (child[i].id) {
if (child[i].id == "main" && flag === 0) {
build(child[i]);
} else if (child[i].id.search(/a/i) === 0 && flag === 2) {
build(child[i]);
} else {
build(child[i]);
}
}
}
}
document.addEventListener("mouseover", anite, false);
})()
html,body {
height: 100%;
}
body {
display: flex;
align-items: center;
}
main {
width: 100%;
overflow: hidden;
}
.eyes {
width:50%;
float: left;
height: 300px;
}
#main {
background: url('eyes.png') no-repeat 0 0;
width: 1000px;
height: 254px;
display:none;
}
#left {
background: url('eyes.png') no-repeat 0 -254px;
width: 1000px;
height: 254px;
display:none;
}
#aLeft {
background: url('eyes.png') no-repeat 0 -508px;
width: 1000px;
height: 254px;
display:none;
}
#right {
background: url('eyes.png') no-repeat 0 -762px;
width: 1000px;
height: 254px;
display:none;
}
#aRight {
background: url('eyes.png') no-repeat 0 -1016px;
width: 1000px;
height: 280px;
display:none;
}
<html>
<head>
<title>Student Details</title>
</head>
<body>
<main>
<div class="eyes">
<!-- <img src="eyes.png" alt="eyes"> -->
<p id="main"></p>
<p id="right"></p>
<p id="aRight"></p>
</div>
<div class="eyes">
<p id="main"></p>
<p id="left"></p>
<p id="aLeft"></p>
</div>
</main>
</body>
</html>

What could cause the If loop to not trigger the video pause / play function

I am trying to fork a tutorial file and create an MCQ style video which has buttons that are overlayed on the video and are triggered at particular durations of the video itself.
I've got it to work mostly, except, it stopped working after the 30 sec mark of the video, I must have screwed something up, but I can't figure out what.
Ideally, at 30 sec mark, the user is given two choices.
Choice 1 resumes the play for another few seconds and pauses, indicating the end of the video.
Choice 2 skips the video for the duration of the choice 1 answer and THEN plays for a few seconds and reaches the end of the video.
But I broke this check post at 30 sec please help me fix it.
Here is my JS code is :
// Various variables
var videoHalfWay = 0;
var formattedHalfWay = 0;
// Choice parts
var choiceHeart = 2;
var ending = 20;
var goodChoiceChosen = false;
var choiceHeartchosen = false;
var qualityChosen = false;
var costChosen = false;
var qualityQuestion = 30;
var costPart = 38;
var costCons = 36;
// Question variable
var question1Asked = false;
var video1;
$(document).ready(function(){
video1 = $('#video1');
$('.box1').on('click', function(){
choiceHeartchosen = true;
video1[0].play();
});
$('.box2').on('click', function(){
video1[0].play();
});
$('.box3').on('click', function(){ //quality
costChosen = true;
video1[0].currentTime = costPart;
});
$('.box4').on('click', function(){ //cost
qualityChosen = true;
video1[0].play();
});
$(video1).on('loadeddata', function(){
videoHalfWay = Math.round(this.duration/2);
})
$(video1).on('timeupdate', function()
{
var currentTime = Math.round(this.currentTime);
var durationNum = Math.round(this.duration);
var formattedCurrentTime = secondsToHms(currentTime);
var formattedDurationTime = secondsToHms(durationNum)
onTrackedVideoFram(formattedCurrentTime, formattedDurationTime)
if(currentTime >2){ $(".box1, .box2").hide(); }
if(currentTime <20){ $(".box4").hide(); }
if(currentTime <22){ $(".box3").hide(); }
if(currentTime >20){ $(".box4").show(); }
if(currentTime >21){ $(".box3").show(); }
if(currentTime >30){ $(".box3, .box4").hide(); }
if(currentTime == costCons && costChosen == true){ video1[0].pause(); }
if(currentTime == choiceHeart && choiceHeartchosen == false){ video1[0].pause(); }
if(currentTime == qualityQuestion && qualityChosen == false){ video1[0].pause(); }
if(currentTime == qualityQuestion && costChosen == false){
video1[0].pause();
}
if(currentTime == qualityQuestion && costChosen == true){
video1[0].play();
}
if (currentTime == qualityQuestion && qualityChosen == true) {
video1[0].playPauseVideo(); }
if(currentTime == badChoicePart && goodChoiceChosen == true){
video1[0].pause();
}
if(currentTime == videoHalfWay){
// Halfway point
}
if(currentTime == durationNum){
// Video complete
}
});
});
function onTrackedVideoFram(curretTime, duration){
$('.current').text(curretTime);
$('.duration').text(duration);
}
function secondsToHms(d) {
d = Number(d);
var h = Math.floor(d / 3600);
var m = Math.floor(d % 3600 / 60);
var s = Math.floor(d % 3600 % 60);
return ((h > 0 ? h + ":" + (m < 10 ? "0" : "") : "") + m + ":" + (s < 10 ? "0" : "") + s);
}
function playPauseVideo(popUp){
if(video1[0].paused){
video1[0].play();
} else{
video1[0].pause();
$.featherlight($(popUp));
}
}
Problem:
The video does not play after 30 sec despite which ever choice boxes are clicked.
Html :
<!DOCTYPE html>
<html>
<head>
<title>Interactive Video</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- jQuery -->
<script src="js/jquery-1.12.3.min.js"></script>
<!-- Skeleton CSS & Featherlight -->
<link rel="stylesheet" href="css/normalize.css">
<link rel="stylesheet" href="css/skeleton.css">
<link rel="stylesheet" href="css/featherlight.css">
<script src="js/featherlight.js"></script>
<!-- Interaction CSS -->
<link rel="stylesheet" href="css/interaction.css">
<!-- Interaction js -->
<script src="js/interaction.js"></script>
<!-- GreenSock -->
<script src="js/TweenMax.min.js"></script>
</head>
<body>
<div class="container">
<div class="row videoArea">
<div class="box1" style="z-index: 2"></div>
<div class="box2" style="z-index: 2"></div>
<div class="box3" style="z-index: 2"></div>
<div class="box4" style="z-index: 2"></div>
<div class="videoCont">
<video id="video1" controls autoplay="true">
<source src="media/video1.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
</div>
</div>
<div class="row descArea">
<h5>Video Title</h5>
<p>This is the description</p>
<div class="current">0:00</div>
<div class="duration">0:00</div>
</div>
</div> <!-- End of Container -->
<div class="lightbox popUpQuestion1">
<h4>Question 1</h4>
<p>Think about what you learned and then how would you respond?</p>
<br>
Calmly respond with helpful info
Why is he asking me this question?
</div>
<div class="lightbox persona1PopUp">
<img src="images/Justin.jpg">
<h5>Justins Hanks</h5>
<p>Role: Development Manager</p>
<p>Bio: Justin has been a manager for 4 years. sakjdhsakjdh askjdh ksajhd aksjh askjdhksajd askjhd askjhdkjsah </p>
<p>Previous Experiences</p>
<ul>
<li>Experience 1: 2002-2004</li>
<li>Experience 2: 2005-2009</li>
<li>Experience 3: 2010-2016</li>
</ul>
</div>
<div class="lightbox persona2PopUp">
<img src="images/Matt.jpg">
<h5>Matt Briscoe</h5>
<p>Role: Developer</p>
<p>Bio: Matt has been a manager for 4 years. This alkjdlas asldkjasldj aslkdj aklsdjlsakdjalskjd salkdj salkjd</p>
<p>Previous Experiences</p>
<ul>
<li>Experience 1: 2002-2004</li>
<li>Experience 2: 2005-2009</li>
<li>Experience 3: 2010-2016</li>
</ul>
</div>
</body>
</html>
And here is the Css :
body{
background-color: #f0f0f0;
}
h1, h2, h3, h4, h5, h6{
margin: 0;
font-weight: bold;
}
p{
margin: 0;
}
video{
width: 100%;
height: auto;
}
img{
float: left;
margin-right: 25px;
}
.container{
margin-top: 20px;
}
.descArea{
background-color: #fff;
box-shadow: 0 0 3px #c8c8c8;
padding: 15px;
box-sizing: border-box;
}
.videoArea{
position: relative;
}
.box1{
position: absolute;
background-color: rgba(255, 198, 10, 1);
width: 10%;
height: 15%;
top: 10%;
left: 44%;
cursor: pointer;
transition:opacity 500ms;
}
.box2{
position: absolute;
background-color: rgba(125, 185, 42, 1);
width: 10%;
height: 15%;
top: 32%;
left: 26%;
cursor: pointer;
transition:opacity 500ms;
}
.box3{
position: absolute;
background-color: rgba(160, 185, 42, 1);
width: 31%;
height: 46%;
top: 50%;
left: 7%;
cursor: pointer;
transition:opacity 500ms;
}
.box4{
position: absolute;
background-color: rgba(125, 285, 42, 1);
width: 33%;
height: 47%;
top: 50%;
left: 59%;
cursor: pointer;
transition:opacity 500ms;
}
.lightbox{
display: none;
}
.longBtns{
display: block;
}
.videoCont{
position: relative;
pointer-events: none;
}
Please, help me to figure this out.

Due to a major lack of example code, I'm going to take a stab and say that if you were to look at your web console an error will be displayed about the following function not existing on the object:
if(currentTime == qualityQuestion && qualityChosen == true)
{
video1[0].playPauseVideo();
}
It should probably read:
if(currentTime == qualityQuestion && qualityChosen == true)
{
playPauseVideo();
}

JS function is passed a different value depending on whether I'm executing or debugging

PROBLEM: Element with id "containerLnkMenu" does not center correctly in it's parent div when passed into the js function "centerElementYParent" unless I put a break point in the function using google chrome's debugger.
The "getComputedStyle(f, null)" call returns a "0px" for height if executed normally so I end up with a '-57px' for the margin-top.
COMMENT: So I found a few people that had similar problems on the internet, but I couldn't find a way to map their solution to my needs.
Any help on this would be appreciated.
Let me know if you need me to explain anything further.
I would prefer a detailed response or links to further reading, that is related to my issue (so I can learn from this error), but any related/helpful comment is welcome.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<!--[if lt IE 9]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link rel="stylesheet" href="main.css">
<script src="main.js"></script>
</head>
<body>
<div id="btnMenu" class="borderRadius" style="top: 10px; left: 10px;" onClick="btnMenuClicked(this)">
<div id="bar1" class="bar"></div>
<div id="bar2" class="bar"></div>
<div id="bar3" class="bar"></div>
</div>
<div id="menu" class="borderRadius" style="width: 0px; height: 0px;">
<div id="containerLnkMenu">
<a id="lnkNews" class="centerTxt lnkMenu" href="">NEWS</a>
<a id="lnkFiles" class="centerTxt lnkMenu" href="">FILES</a>
<a id="lnkTree" class="centerTxt lnkMenu" href="">TREE</a>
</div>
</div>
</body>
<script>
function btnMenuClicked(e) {
animateBtnMenu(e);
var menu = document.getElementById('menu');
var menuStyle = window.getComputedStyle(menu, null);
if (menuStyle.width == '0px' && menuStyle.height == '0px') {
openMenu(menu, menuStyle, e);
centerElementYParent(document.getElementById('containerLnkMenu'), document.getElementById('menu'));
} else {
closeMenu(menu, menuStyle, e);
}
}
</script>
</html>
body {
margin: 0;
font-family: Arial;
font-size: 16px;
}
a {
display: block;
text-decoration: none;
cursor: pointer;
}
/* Class Tools */
.centerTxt { text-align: center; }
.borderRadius { border-radius: 5px; }
.bar {
height: 5px;
transition: 0.4s;
background-color: #2E0A91;
}
.lnkMenu {
padding: 5px;
color: #FFD500;
font-size: 1.5em;
}
/*--- navigation ---*/
#btnMenu {
position: fixed;
width: 25px;
padding: 5px;
transition: 0.8s;
cursor: pointer;
}
#btnMenu:hover { background-color: #2E0A91; }
#btnMenu:hover .bar { background-color: #D4B100; }
#bar2 { margin: 5px 0 5px 0; }
.change #bar1 {
transform: rotate(-45deg) translate(-10px, 4px);
width: 141%;
}
.change #bar2 { opacity: 0; }
.change #bar3 {
transform: rotate(45deg) translate(-10px, -4px);
width: 141%;
}
#menu {
position: fixed;
z-index: 100;
top: 0;
left: 0;
overflow: hidden;
transition: 0.8s;
background-color: #2E0A91;
}
//NAME: centerElementYParent
//DESCRITPTION: e = element to center, f = parent element
// Adds margin top to e in order to vertically center element within parent (f)
function centerElementYParent(e, f) {
var eStyle = window.getComputedStyle(e, null);
var fStyle = window.getComputedStyle(f, null);
console.log(fStyle.height);
var eHeight = parseInt(eStyle.height.slice(0, eStyle.height.length - 2));
var fHeight = parseInt(fStyle.height.slice(0, fStyle.height.length - 2));
var marginTop = ((fHeight - eHeight)/2) + 'px';
e.style.marginTop = marginTop;
}
//NAME: animateBtnMenu
//DESCRIPTION: Attaches the 'change' class to the btnMenu element.
function animateBtnMenu(e) {
e.classList.toggle('change');
}
//NAME: openMenu
//DESCRIPTION: Applies a width and height to the menu whilst moving the menu button respectivley
function openMenu(e, eStyle, f) {
e.style.height = '250px';
e.style.width = '300px';
var eStyle = window.getComputedStyle(e, null);
f.style.left = '310px';
f.style.top = '260px';
}
//NAME: closeMenu
//DESCRIPTION: Sets width and height of the menu to 0 and moves the menu button respectivley
function closeMenu(e, eStyle, f) {
e.style.width = '0px';
e.style.height = '0px';
f.style.top = '10px';
f.style.left = '10px';
}

It may be because the element you want to center didn't rendered on the right position yet. Try adding setTimeout to call the function.
openMenu(menu, menuStyle, e);
setTimeout(function() {
centerElementYParent(document.getElementById('containerLnkMenu'), document.getElementById('menu'));
}, 800);