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CSS - Absolute and Relative Position with image fader

I'm working with an image fader program, but I'm not understanding absolute positioning. I have the images fading nicely and resizing the way I want if the screen resizes. but I have 2 problems. Div#2 gets covered up by the images. I want div2 to always appear below the image div. Also, I have control buttons on the images. I want them in the middle. I thought using top:50% would do that, but it's not. Here's an example...
var slides = document.querySelectorAll('#slides .slide');
var currentSlide = 0;
var slideInterval = setInterval(nextSlide,5000);
function nextSlide(){goToSlide(currentSlide+1);}
function previousSlide(){goToSlide(currentSlide-1);}
function goToSlide(n){
slides[currentSlide].className = 'slide';
currentSlide = (n+slides.length)%slides.length;
slides[currentSlide].className = 'slide showing';}
var next = document.getElementById('next');
var previous = document.getElementById('previous');
next.onclick = function(){nextSlide();};
previous.onclick = function(){previousSlide();};
#slides {position: relative}
.slide{
position: absolute;
left: 0px;
top: 0px;
width:100%;
height:auto;
min-height:300px;
object-fit:cover;
opacity: 0;
box-sizing:border-box;
transition: opacity 2s;}
.showing{opacity: 1;}
.controls{
background: transparent;
color: #fff;
font-size: 30px;
cursor: pointer;
border: 1px solid #555;
width: 30px;
position: absolute;
}
.controls:hover{ opacity:.5}
.fadenext{right: 10px; top: 50%;}
.fadeprev{left: 10px; top: 50%;}
<br><br>
<div id="slides">
<img src='https://www.panotools.org/dersch/Monp.JPG' class="slide showing">
<img src='https://www.panotools.org/dersch/StBp.JPG' class="slide">
<button class="controls fadeprev" id="previous"><</button>
<button class="controls fadenext" id="next">></button>
</div>
<div style='margin-top:40px;border:1px solid red;width:200px;height:100px'>
This is Div # 2</div>

I've amended your snippet to fix your issues.
Adding margin-top instead of top will fix your issue with the
controls.
Div 2 will now always remain below your slider.
P.S. I moved your div2 inline styles to keep it neat.
var slides = document.querySelectorAll('#slides .slide');
var currentSlide = 0;
var slideInterval = setInterval(nextSlide, 5000);
function nextSlide() {
goToSlide(currentSlide + 1);
}
function previousSlide() {
goToSlide(currentSlide - 1);
}
function goToSlide(n) {
slides[currentSlide].className = 'slide';
currentSlide = (n + slides.length) % slides.length;
slides[currentSlide].className = 'slide showing';
}
var next = document.getElementById('next');
var previous = document.getElementById('previous');
next.onclick = function() {
nextSlide();
};
previous.onclick = function() {
previousSlide();
};
* {
margin: 0;
padding: 0;
}
#slides {
position: relative
}
.slide {
position: absolute;
left: 0px;
top: 0px;
width: 100%;
height: auto;
min-height: 300px;
object-fit: cover;
opacity: 0;
box-sizing: border-box;
transition: opacity 2s;
}
.showing {
opacity: 1;
}
.controls {
background: transparent;
color: #fff;
font-size: 30px;
cursor: pointer;
border: 1px solid #555;
width: 30px;
position: absolute;
}
.controls:hover {
opacity: .5
}
.fadenext {
right: 10px;
margin-top: 25%;
}
.fadeprev {
left: 10px;
margin-top: 25%;
}
.div2 {
margin-top: 50%;
border: 1px solid red;
width: 200px;
height: 100px;
}
<br><br>
<div id="slides">
<img src='https://www.panotools.org/dersch/Monp.JPG' class="slide showing">
<img src='https://www.panotools.org/dersch/StBp.JPG' class="slide">
<button class="controls fadeprev" id="previous"><</button>
<button class="controls fadenext" id="next">></button>
</div>
<div class="div2">This is Div # 2</div>

It's not feasible to use % based positions when you use "top" style. So to achieve what you want to do, use margin-top instead. As shown below:
.fadenext{right: 10px; margin-top: 25%;}
.fadeprev{left: 10px; margin-top: 25%;}
And for your div2, just change it's style to:
margin-top: 50%

try to setTimeout to show and hide the balls

I tried to write a program to practice my js skills. There are 3 balls and they are hidden at first. I want the ball_1 shows up first, and after 1 sec, ball_1 disappears. Next, ball_2 shows up and after 1 sec it disappears; same logic goes with ball_3. When I run my code, the first two balls does not hide. I am not sure what is going wrong. The code below are the html, css, and js code that i wrote. Hope someone could help me out. Thank you in advance.
$(document).ready(function() {
var notes = ['ball_1', 'ball_2', 'ball_3'];
for (i = notes.length; i > 0; i--) {
var note = notes.shift();
$('#' + note).addClass('shown');
setTimeout(function() {
$('#' + note).removeClass('shown');
}, 1000);
}
});
#ball_1 {
width: 10px;
height: 10px;
background: #000000;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_2 {
width: 10px;
height: 10px;
background: #0000FF;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_3 {
width: 10px;
height: 10px;
background: #7FFF00;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_1,
#ball_2,
#ball_3 {
width: 10px;
height: 10px;
border: 2px solid #ccc;
border-radius: 50%;
}
.not_shown {
display: none;
}
.shown {
display: block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/themes/smoothness/jquery-ui.css">
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<div id="ball">
<div id="ball_1" class="not_shown"></div>
<div id="ball_2" class="not_shown"></div>
<div id="ball_3" class="not_shown"></div>
</div>

In general never modify an array when iterating using a for loop. The shift method will remove the first item from the array thus modifying it's length. Instead do this:
$(document).ready(function() {
var notes = ['ball_1','ball_2','ball_3'];
var i; // You were declaring "i" in global namespace before. Don't do that.
for(i = 0; i < notes.length; i++){
var note = notes[i];
$('#' + note).addClass('shown');
setTimeout(function() {
$('#' + note).removeClass('shown');
},1000);
}
});
Also you will see from my note that you were defining "i" in the global namespace. It is never good to do that so always make sure to define your variables at the beginning of the function block if using "var".
EDIT: missed a semicolon
EDIT2: completely missed that i needed to change up the loop condition.

You are looking for an asnychronous play of events - first ball_1 shows up for 1 sec and after that ball_2 shows up for 1 sec and so forth.
Something like this won't work:
for( var i = 0; i < notes.length; i++){
$('#' + notes[i]).addClass('shown');
setTimeout(function() {
$('#' + notes[i]).removeClass('shown');
},1000);
}
because the timeouts will be registered one after the other in quick succession and all the balls will show up and hide in little over one second.
So you can create a callback and set the timeout for the next ball only after the previous ball has been shown fully for 1 sec - see demo below:
$(document).ready(function() {
var notes = ['ball_1', 'ball_2', 'ball_3'];
hideBall(notes,0);
});
function hideBall(notes,i) {
$('#' + notes[i]).addClass('shown');
hide(function() {
if(++i < notes.length) {
hideBall(notes,i);
}
}, notes[i]);
}
function hide(callback, note) {
setTimeout(function() {
$('#' + note).removeClass('shown');
callback();
}, 1000);
}
#ball_1 {
width: 10px;
height: 10px;
background: #000000;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_2 {
width: 10px;
height: 10px;
background: #0000FF;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_3 {
width: 10px;
height: 10px;
background: #7FFF00;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_1,
#ball_2,
#ball_3 {
width: 10px;
height: 10px;
border: 2px solid #ccc;
border-radius: 50%;
}
.not_shown {
display: none;
}
.shown {
display: block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/themes/smoothness/jquery-ui.css">
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<div id="ball">
<div id="ball_1" class="not_shown"></div>
<div id="ball_2" class="not_shown"></div>
<div id="ball_3" class="not_shown"></div>
</div>

Hope this is what you need
$(document).ready(function() {
var notes = ['ball_1','ball_2','ball_3'];
for(i = notes.length; i > 0; i--){
var note = notes[i];
$('#' + note).addClass('shown');
hideBall(note, i)
}
});
function hideBall(note) {
setTimeout(function() {
$('#' + note).removeClass('shown');
},1000 * i);
}
#ball_1{
width: 10px;
height: 10px;
background: #000000;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_2{
width: 10px;
height: 10px;
background: #0000FF;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_3{
width: 10px;
height: 10px;
background: #7FFF00;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_1, #ball_2, #ball_3 {
width: 10px;
height: 10px;
border: 2px solid #ccc;
border-radius: 50%;
}
.not_shown {
display: none;
}
.shown {
display: block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id = "ball">
<div id = "ball_1" class = "not_shown"></div>
<div id = "ball_2" class = "not_shown"></div>
<div id = "ball_3" class = "not_shown"></div>
</div>

What you are trying won't work as it will run the for loop all in one go, setting up 3x timeouts.
try something like this
jQuery(document).ready(function($) {
function myBallLoop(){
// increment as needed
if(typeof note == 'undefined') {
var note = 1;
} else if (note == 3){
break; // end loop
} else {
note ++;
}
// show current ball qickly
$('#ball_' + note).show('fast', function(){
// call back after show event
// hide current ball after 1 sec
r = setTimeout(function(){$('#ball_' + note).hide()}, 1000);
// self call function after 2 seconts
t = setTimeout(function(){myBallLoop();, 2000}
});
}
// loop start
myBallLoop();
});

Take advantage of what jquery gives you.
Iterate using $.each is also the same as ES5's forEach. Using delay method to delay a function of adding classes is similar to setTimeout.
$(document).ready(() => {
var notes = ['ball_1','ball_2','ball_3'];
let showBalls = (i, item) => {
$('#' + item).delay(i * 1000).queue(() => {
$('#' + item).addClass('shown');
$('#' + notes[i - 1]).removeClass('shown').clearQueue();
});
}
$.each(notes, (i, item) => {
showBalls(i, item);
});
});
#ball_1{
width: 10px;
height: 10px;
background: #000000;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_2{
width: 10px;
height: 10px;
background: #0000FF;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_3{
width: 10px;
height: 10px;
background: #7FFF00;
border: 2px solid #ccc;
border-radius: 50%;
}
#ball_1, #ball_2, #ball_3 {
width: 10px;
height: 10px;
border: 2px solid #ccc;
border-radius: 50%;
}
.not_shown {
display: none;
}
.shown {
display: block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id = "ball">
<div id = "ball_1" class = "not_shown"></div>
<div id = "ball_2" class = "not_shown"></div>
<div id = "ball_3" class = "not_shown"></div>
</div>

Using jQuery to subtract 1 from a current css value on several divs

Does anyone know how I would use jQuery to subtract 1 from a current css value of several divs with the same class on a click? I have 5 divs with the same class, each have their own z-index setting. I want to subtract 1 from their current value when I click on one div. My goal is to bring one div forward on click setting z-index to 100. I then want to subtract 1 from the others' current value (whatever that is) on that same click to send them back.
$('.classname').mousedown(function() {
$(this).css("z-index", "100");
$(this).siblings().css("z-index", - 1);
});
});
This code just sets all the siblings z-index to -1.
Thanks for any help. I'm also open to suggestions on a better way to do this.

You can give the css() method a function to perform some logic on the current value. Try this:
$('.classname').mousedown(function() {
$(this)
.css("z-index", "100")
.siblings().css("z-index", function(i, val) {
return parseInt(val, 10) - 1;
});
});

So basically, you want to do this?
var divs = document.getElementsByClassName('classname');
function setZIndex(div) {
div.style.zIndex = window.getComputedStyle(div).zIndex - 1;
}
function handler(e) {
[].forEach.call(divs, setZIndex);
e.target.style.zIndex = 100;
}
[].forEach.call(divs, function(div) {
div.addEventListener('click', handler, false);
});
.classname {
width: 20px;
height: 20px;
border-style: solid;
border-width: 1px;
}
#one {
position: absolute;
top: 0px;
left: 0px;
background-color: red;
z-index: -1;
}
#two {
position: absolute;
top: 15px;
left: 10px;
background-color: blue;
z-index: -1;
}
#three {
position: absolute;
top: 30px;
left: 20px;
background-color: yellow;
z-index: -1;
}
#four {
position: absolute;
top: 45px;
left: 30px;
background-color: green;
z-index: -1;
}
#five {
position: absolute;
top: 60px;
left: 40px;
background-color: white;
z-index: -1;
}
<div id="one" class="classname"></div>
<div id="two" class="classname"></div>
<div id="three" class="classname"></div>
<div id="four" class="classname"></div>
<div id="five" class="classname"></div>

lightbox with 2 different progress bar inside

I have created a lightbox in javascript and I have placed inside it a progress bar that I have also created it in javascript. My problem is that when I was trying to insert a second progress bar inside my lightbox only the first works. Any idea how to fix this?
this is my jsfiddle :http://jsfiddle.net/QHMKk/3/
and my code is this:
my javascript is:
function show() {
document.getElementById('light').style.display='block';
document.getElementById('fade').style.display='block';
}
function start() {
var stepSize = 50;
setTimeout((function() {
var filler = document.getElementById("filler"),
percentage = 0;
return function progress() {
filler.style.height = percentage + "%";
percentage +=1;
if (percentage <= 100) {
setTimeout(progress, stepSize);
}
}
}()), stepSize);
}
function start() {
var stepSize = 50;
setTimeout((function() {
var filler2 = document.getElementById("filler2"),
percentage = 0;
return function progress() {
filler.style.height = percentage + "%";
percentage +=1;
if (percentage <= 100) {
setTimeout(progress, stepSize);
}
}
}()), stepSize);
}
this is my html:
OPEN
<div id="light" class="white_content_stats">
<div class="prog">
<div id="filler" class="filler"></div>
</div>
</br>
<div class="prog2">
<div id="filler2" class="filler2"></div>
</div>
<a href = "javascript:void(0)" onclick = " document.getElementById('light').style.display='none';document.getElementById('fade').style.display='none'; ">
</br>CLOSE</a>
and this is my CSS:
.black_overlay_stats{
display: none;
position: absolute;
top: 0%;
left: 0%;
width: 100%;
height: 50%;
z-index:1001;
-moz-opacity: 0.6;
opacity:.70;
filter: alpha(opacity=70);
}
.white_content_stats {
display: none;
position:fixed;
top: 15%;
width: 300px;
padding: 30px;
margin-left:10px;
background-color:#F2F2F2;
border-radius: 0px;
box-shadow: 0px 0px 0px 20px rgba(0,0,0,0.6);
z-index:1002;
}
.prog {
height: 100px;
width: 30px;
border: 1px solid white;
position: relative;
}
.filler {
height: 0%;
width: 30px;
position: absolute;
bottom: 0;
background-color: grey;
}
.prog2 {
height: 100px;
width: 30px;
border: 1px solid white;
position: relative;
}
.filler2 {
height: 0%;
width: 30px;
position: absolute;
bottom: 0;
background-color: grey;
}

You define 2 functions with the same name start, so the second will be used and only it will be run, hence you can see only 1 progress bar works. You can modify the function start to make it accept an argument of id like this:
function start(id) {
//...
var filler = document.getElementById(id)
//...
}
Then call both start('filler') and start('filler2'):
OPEN
Updated Demo.
Note that you should not use inline event property.

for/if loop to run a function multiple times depending on input :: jquery

I am writing a slider from scratch, no plugins.
I have my slider working, based on adding the slides together and plus or minus the length of the slider window.
It has become complicated when pagination needs to be added. I can't seem to wrap my head around the logic of the function needed to be written that states.
if button 1 is clicked run the function 1 time and go to slide one.
if button 2 is clicked run the function 2 times and go to slide two. .... and so on..
The issue I see coming from this is if on slide 3 and the button 4 is clicked the function only needs to move once not 4 times!! This is where my head breaks and all logic spills out of my ears.
How do I go about writing something like this?
here is the jsfiddle I have so far. http://jsfiddle.net/r5DY8/2/
Any help would be appreciated.
:: all the code on one page if you don't want to use jsfiddle ::
<!DOCTYPE html>
<html>
<head>
<script src='http://code.jquery.com/jquery-1.9.0.min.js'type="text/javascript"></script>
<link href='http://fonts.googleapis.com/css?family=Marmelad' rel='stylesheet' type='text/css'>
<style type="text/css">
body {
font-family: 'Marmelad', sans-serif;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select:none;
user-select:none;
}
#slideContainer {
position: relative;
width: 990px;
height: 275px;
float: left;
overflow: hidden;
margin-top:5%;
margin-left:15%;
}
#slideWrap {
width: 3960px;
height: 275px;
position: absolute;
top: 0;
left: 0;
}
.slide {
width: 990px;
height: 275px;
float: left;
}
.slide:first-child { background-color: #009999; }
.slide:nth-child(2) { background-color: #CC0033; }
.slide:nth-child(3) { background-color: #FFFF66; }
.slide:nth-child(4) { background-color: #006699; }
#clickLeft{
color: black;
float: left;
margin: 12% 0% 0 15%;
/*background: url("prev.png") no-repeat;*/
width: 60px;
height: 60px;
cursor: pointer;
list-style: none;
position: absolute;
z-index: 9;
border:1px solid black;/**/
}
#clickRight{
color: black;
float: right;
margin: 12% 0 0 79.5%;
/*background: url("next.png") no-repeat;*/
width: 60px;
height: 60px;
cursor: pointer;
list-style: none;
position: absolute;
border:1px solid black;/**/
}
.dots{
width: 9%;
position: absolute;
top: 310px;
text-align: center;
height: 45px;
padding-top: 5px;
background: white;
left: 43.5%;
border-radius: 8px;
list-style:none;
}
.dots li {
display: inline-block;
list-style:none;
}
.dots li:first-child {
margin-left:-40px;
}
.dots li a{
width: 16px;
height: 16px;
display: block;
background: #ededed;
cursor: pointer;
-webkit-border-radius: 20px;
-moz-border-radius: 20px;
-o-border-radius: 20px;
border-radius: 20px;
margin: 5px;
}
.dots li a:hover { background: rgba(0, 0, 0, 0.7); }
.styleDots { background: #a4acb2; }
.active { background: #a4acb2;
-webkit-border-radius: 20px;
-moz-border-radius: 20px;
-o-border-radius: 20px;
border-radius: 20px;}
li.pagerItem{
}
</style>
<script type="text/javascript">
$(function(){
var currentSlidePosition = 0;
var slideW = 990;
var allSlides = $('.slide');
var numberOfSlides = allSlides.length;
var marker;
$('.slide').each(function(i) {
listNumber=i+1;
marker = $("<li>");
marker.addClass('pagerItem '+listNumber);
$("<a href='#' ></a>").appendTo(marker);
if (i===0){
marker.addClass('active');
}
marker.appendTo($(".dots"));
});
allSlides.wrapAll('<div id="moveSlide"></div>').css({'float' : 'left','width' : slideW});
$('#moveSlide').css('width', slideW * numberOfSlides);
$('body').prepend('<li class="controls" id="clickLeft"></li>')
.append('<li class="controls" id="clickRight"></li>');
$('.controls').click(function(){
moveSlide(this);
moveSlide(this); // running twice because the function is being called twice
//create a function that says if button 1 is clicked run the function 1 time if button 3 is clicked run the function 3 times..
});
var moveSlide = function(thisobject){
console.log('function run');
if(($(thisobject).attr('id')=='clickRight')) {
if(currentSlidePosition == numberOfSlides-1)currentSlidePosition=0;
else currentSlidePosition++;
var active = $(".active").removeClass('active');
if(active.next() && active.next().length){
active.next().addClass('active');
} else {
active.siblings(":first").addClass('active');
}
} else if($(thisobject).attr('id')=='clickLeft'){
if(currentSlidePosition == 0)currentSlidePosition=numberOfSlides-1;
else currentSlidePosition--;
var active = $(".active").removeClass('active');
if(active.prev() && active.prev().length){
active.prev().addClass('active');
} else {
active.siblings(":last").addClass('active');
}
}
$('#moveSlide').animate({'margin-left' : slideW*(-currentSlidePosition)});
}
});
</script>
</head>
<body>
<div id="slideContainer">
<div id="slideWrap">
<div class="slide">1</div>
<div class="slide">2</div>
<div class="slide">3</div>
<div class="slide">4</div>
</div>
</div>
<ul class="dots"></ul>
</body>
</html>

It's more complicated than just calling the function a number of times. As the animation is asynchronous, you need to call the function again when the animation has finished, not right away.
Add a callback parameter to the function so that it can use that do do something when the animation finishes:
var moveSlide = function (thisobject, callback) {
Add the callback to the animation:
$('#moveSlide').animate({
'margin-left': slideW * (-currentSlidePosition)
}, callback);
Make a function moveTo that will call moveSlide in the right direction, and use itself as callback:
function moveTo(target){
if (target < currentSlidePosition) {
moveSlide($('#clickLeft'), function(){ moveTo(target); });
} else if (target > currentSlidePosition) {
moveSlide($('#clickRight'), function(){ moveTo(target); });
}
}
Bind the click event to the links in the dots. Use the index method to find out which slide you want to go to, and call moveTo to do it:
$('.dots a').click(function(e){
e.preventDefault();
var target = $(this).parent().index();
moveTo(target);
});
Fiddle: http://jsfiddle.net/Guffa/r5DY8/3/

From a purely logical point of view (assumes the existence of two variables - curr_slide_num and butt_num):
for (var i=0; i < Math.abs(curr_slide_num - butt_num); i++) my_func();
Be careful of zero indexing; either treat the first button and first slide as number 0, or neither, else the maths will break down.
This takes no account of the direction the slider should move. I haven't looked at your Fiddle but I guess you would pass direction as an argument to the function. Let's say the function expects direction as its first argument - the string 'left' or 'right'
for (var i=0; i < Math.abs(curr_slide_num - butt_num); i++)
my_func(curr_slide_num < butt_num ? 'left' : 'right');