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Adding backgroundImage to body in jquery in second loop not working

I have three classes box with randomly selected image and from array items, there is a square box002 at right lower portion, this can be drag and droppped to any of three box if it find match the box will dissappear . likwise three box will dissappear.
then a class bodyblue is added to body with backgroundImage named middle bg is added to body for 10 seconds . after again 3 box appear for drag and drop.
in the second level after this three boxes are dragged&dropped and deleted, when bodyblue is added to body the backgroundImage middle bg is not appearing in for 10 seconds.
How to add bodyblue backgroundImage to body using jquery in second level and third level?
var array2 = [];
var arraycart = [];
var disparray = [];
var bg = [];
var dataURL;
var timeOut;
counter = 0;
var items = [{
label: '1',url: 'https://via.placeholder.com/150x150.jpg?text=image1'},
{label: '2',url:'https://via.placeholder.com/150x150.jpg?text=image2'},
{label: '3',url:'https://via.placeholder.com/150x150.jpg?text=image3'},
{label: '4',url:'https://via.placeholder.com/150x150.jpg?text=image4'},
{label: '5',url:'https://via.placeholder.com/150x150.jpg?text=image5'},
{label: '6',url:'https://via.placeholder.com/150x150.jpg?text=image6'},
{label: '7',url:'https://via.placeholder.com/150x150.jpg?text=image7'},
{label: '8',url:'https://via.placeholder.com/150x150.jpg?text=image8'},
{label: '9',url:'https://via.placeholder.com/150x150.jpg?text=image9'},
{label:'10',url:'https://via.placeholder.com/150x150.jpg?text=image10'}
];
var notes = ['https://via.placeholder.com/150x150.jpg?text=image1',
'https://via.placeholder.com/150x150.jpg?text=image2',
'https://via.placeholder.com/150x150.jpg?text=image3',
'https://via.placeholder.com/150x150.jpg?text=image4',
'https://via.placeholder.com/150x150.jpg?text=image5',
'https://via.placeholder.com/150x150.jpg?text=image6',
'https://via.placeholder.com/150x150.jpg?text=image7',
'https://via.placeholder.com/150x150.jpg?text=image8',
'https://via.placeholder.com/150x150.jpg?text=image9',
'https://via.placeholder.com/150x150.jpg?text=image10'
];
var tempimages = [];
var notesselected = [];
array2 = items.slice();
var item;
//----------------------------------------------change backgroundImage----------------------------------------------------------
function changemainbackground() {
debugger;
var c = document.getElementById('main');
var img = document.getElementById('main'),
style = img.currentStyle || window.getComputedStyle(img, false),
bi = style.backgroundImage.slice(4, -1).replace(/"/g, "");
// Display the url to the user
//console.log('Image URL: ' + bi);
bodycontents = document.getElementById('main');
if (counter >= 0) {
bodycontents.style.backgroundImage = 'url(' + bg[counter] + ')';
d = bodycontents.style.backgroundImage = 'url(' + bg[counter] + ')';
//console.log(d);
}
counter++;
//console.log("counter is"+counter);
//console.log(bodycontents);
//console.log(d);
}
//--------------------------^^^^^change backgroundImage end here^^^^^^^--------------------------------------------------------
//----------------------------------------------hiddenImage------------------------------------------------------------------------
hiddenimgnumber = 0;
var images = ['https://picsum.photos/200/300', 'https://picsum.photos/200/300', 'https://picsum.photos/200/300'];
//var bg=['https://via.placeholder.com/150x150.jpg?text=image1','https://via.placeholder.com/150x150.jpg?text=image2'];
var bg = ['https://picsum.photos/200/300?image=2', 'https://picsum.photos/200/300?image=3', 'https://picsum.photos/200/300?image=4'];
var refreshIntervalId = setInterval(function() {
image = document.getElementById('hiddenimageid');
image.src = images[hiddenimgnumber];
}, 1)
function hiddenimage() {
clearInterval(refreshIntervalId);
image = document.getElementById('hiddenimageid');
image.src = images[hiddenimgnumber];
//console.log(hiddenimgnumber);
hiddenimgnumber++;
}
//-------------------------------------------------^^^hidden Image ends^^^------------------------------------------------------
window.onload = function() {}
function rvalue() {
elements = document.getElementsByClassName("box");
for (var i = 0; i < elements.length; i++) {
//debugger;
elements[i].style.border = "2px solid #c57232 ";
elements[i].style.borderBottom = "5px solid #c57232 ";
//object.style.borderRadius = "1-4 length|% / 1-4 length|%|initial|inherit"
}
ptags = document.querySelectorAll('[name="values"]');
boxtags = document.getElementsByClassName("box");
//if array length is 0 then we need to identify the game as completed
if (array2.length === 0) {
alert('Game completed');
return;
}
for (var index = 0; index < 3; index++) {
randomIndex = Math.floor(Math.random() * array2.length)
item = array2[randomIndex];
array2.splice(randomIndex, 1);
try {
//ptags[index].style.visibility = "visible";
//ptags[index].textContent = "RS."+item.label;
ptags[index].dataset.itemLabel = item.label;
//using label as an identity
tempimages.push({
data: item,
label: item.label
});
notesselected.push({
data: item.url,
label: item.label
});
boxtags[index].style.backgroundImage = 'url(' + item.url + ')';
} catch (err) {
// console.log('Exception');
}
}
var tlen = tempimages.length;
}
function displayAllImages() {
try {
if (tempimages.length == 0) {
rvalue();
}
if (tempimages.length === 0) {
image = document.getElementById('slide');
image.style.display = 'none';
return;
}
// getting random item from the available items
var arr2 = tempimages;
item = arr2[Math.floor(Math.random() * arr2.length)]
image = document.getElementById('slide');
//getting notes item
//console.log(item);
///////console.log(item.label);
var dataURL = notes.filter(a => a.indexOf("?text=" + item.label) > 0)[0];
//var dataURL =item.url;
//var dataURL = item.label;
console.log(dataURL);
image.src = dataURL;
image.dataset.itemLabel = item.label;
} catch (err) {
//console.log(err.message);
}
};
$(function() {
displayAllImages();
});
function allowDrop(ev) {
ev.preventDefault();
}
function drag(ev) {
ev.dataTransfer.setData("Text", ev.target.id);
}
function drop(ev) {
ev.preventDefault();
var data = ev.dataTransfer.getData("Text");
var x = document.getElementById("slide").dataset.itemLabel;
var y = ev.target.dataset.itemLabel;
//add improvisation box drag is valid
if (ev.target.tagName === "DIV") {
y = ev.target.children[0].dataset.itemLabel;
}
//console.log(x);
//console.log(y);
if (x == y) {
ev.currentTarget.style.backgroundColor = 'initial';
ev.currentTarget.style.backgroundImage = 'initial';
ev.currentTarget.style.border = 'initial';
var pParagraph = ev.currentTarget.firstElementChild;
pParagraph.style.visibility = "hidden";
item = this.item;
tempimages = tempimages.filter(a => a.label !== item.label);
if (tempimages.length == 0) {
rvalue();
hiddenimage();
animateCongrat();
}
displayAllImages();
} else {
}
}
//----------------------------->>>animate congarat starts here-------------------------------------------------------------
var timeOut;
function animateCongrat() {
//debugger;
$('.congrats').show();
clearTimeout(timeOut);
addBlueBody();
hideCongratAndBlueBody();
}
function addBlueBody() {
$("html").css("background-color", " #070755 ");
$('body').addClass('bodyblue')
//console.log(url);
$('#container').hide();
$('#2container').hide();
$('#3container').hide();
$('#2').hide();
$('.completed').hide();
}
function hideCongratAndBlueBody() {
timeOut = setTimeout(() => {
$('.congrats').hide();
$("html").css("background-color", "");
$('body').removeClass('bodyblue')
$('#container').show();
$('#2container').show();
$('#3container').show();
$('#2').show();
$('.completed').hide();
changemainbackground();
}, 10000);
}
//----------------------------->>>animate congarat ends here-------------------------------------------------------------
body {
overflow: hidden;
}
.dashed {
border: 2px dashed #999 !important;
}
.bodyblue {
background-image: url(https://via.placeholder.com/1000x600?text=Middle+bg);
height: 100vh;
width: 100vw;
}
ul {
-moz-border-radius: 50%;
-webkit-border-radius: 50%;
}
.box {
width: calc(33.3% - 4px);
border-radius: 5px;
border: #000 border-color: #e6e600;
margin: -2px;
background-color: #99ffff;
height: 16vh;
display: inline-flex;
align-items: center;
justify-content: center;
background-repeat: no-repeat;
background-size: cover;
cursor: pointer;
}
.box002 {
position: absolute;
top: 40.3vh;
left: 50.98vw;
cursor: pointer;
border: 2px solid black;
}
.box002 img {
width: 15.0vw;
height: 15.0vh;
border-radius: 0%;
}
#container {
white-space: nowrap;
border: px solid #CC0000;
}
.containerr {
border: px solid #FF3399;
}
.pic {
background-size: 100% 100%;
}
.container2 {
width: 29.0vw;
position: fixed;
top: 23.9vh;
left: 19.2vw;
}
body {
background-image: url(https://picsum.photos/200/300?image=0);
background-size: 100vw 100vh;
}
.reset img:hover {
opacity: 1
}
.hiddenimage {
position: absolute;
top: 4.3vh;
left: 50vw;
cursor: pointer;
}
.hiddenimage img {
width: 10.3vw;
height: 10.5vh;
border-radius: 15%;
}
.hand {
position: absolute;
top: 45.3vh;
left: 17vw;
cursor: pointer;
}
.hand img {
width: 25.3vw;
height: 25.5vh;
border-radius: 0%;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container2">
<div class="containerr">
<div class="pic" id="content">
<div id="container">
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="10" style="">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="11">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="12">
<p name="values"></p>
</div>
</div>
</div>
</div>
</div>
<div class="box002" draggable="true" ondragstart="drag(event)" id="2">
<img src="" draggable="true" id="slide" border="rounded" />
</div>
<div class="congrats">
<div class="hiddenimage" style="display:none;">
<img src="" id="hiddenimageid" />
</div>
</div>

adding class to body in jquery not working

I have three class boxes with a randomly selected image and from array items. There is a square box002 at right lower portion, this can be drag and dropped to any of three boxes. If it finds a match, the box will disappear, likewise, box three will disappear.
Then a class named bodyblue is added to the body with a backgroundImage named middle bg is added to body for 10 seconds. After again box three appears for drag and drop.
The problem I am having is:
In the second level after three boxes are dragged & dropped and deleted, when bodyblue is added to body the backgroundImage middle bg is not appearing in for 10 seconds.
How do I add bodyblue backgroundImage to body using jquery in second level and third level?
var array2 = [];
var arraycart = [];
var disparray = [];
var bg = [];
var dataURL;
var timeOut;
counter = 0;
var items = [{
label: '1',url: 'https://via.placeholder.com/150x150.jpg?text=image1'},
{label: '2',url:'https://via.placeholder.com/150x150.jpg?text=image2'},
{label: '3',url:'https://via.placeholder.com/150x150.jpg?text=image3'},
{label: '4',url:'https://via.placeholder.com/150x150.jpg?text=image4'},
{label: '5',url:'https://via.placeholder.com/150x150.jpg?text=image5'},
{label: '6',url:'https://via.placeholder.com/150x150.jpg?text=image6'},
{label: '7',url:'https://via.placeholder.com/150x150.jpg?text=image7'},
{label: '8',url:'https://via.placeholder.com/150x150.jpg?text=image8'},
{label: '9',url:'https://via.placeholder.com/150x150.jpg?text=image9'},
{label:'10',url:'https://via.placeholder.com/150x150.jpg?text=image10'}
];
var notes = ['https://via.placeholder.com/150x150.jpg?text=image1',
'https://via.placeholder.com/150x150.jpg?text=image2',
'https://via.placeholder.com/150x150.jpg?text=image3',
'https://via.placeholder.com/150x150.jpg?text=image4',
'https://via.placeholder.com/150x150.jpg?text=image5',
'https://via.placeholder.com/150x150.jpg?text=image6',
'https://via.placeholder.com/150x150.jpg?text=image7',
'https://via.placeholder.com/150x150.jpg?text=image8',
'https://via.placeholder.com/150x150.jpg?text=image9',
'https://via.placeholder.com/150x150.jpg?text=image10'
];
var tempimages = [];
var notesselected = [];
array2 = items.slice();
var item;
//change backgroundImage
function changemainbackground() {
bodycontents = document.getElementById('main');
if (counter >= 0) {
bodycontents.style.backgroundImage = 'url(' + bg[counter] + ')';
d = bodycontents.style.backgroundImage = 'url(' + bg[counter] + ')';
}
counter++;
}
hiddenimgnumber = 0;
var images = ['https://picsum.photos/200/300', 'https://picsum.photos/200/300', 'https://picsum.photos/200/300'];
//var bg=['https://via.placeholder.com/150x150.jpg?text=image1','https://via.placeholder.com/150x150.jpg?text=image2'];
var bg = ['https://picsum.photos/200/300?image=2', 'https://picsum.photos/200/300?image=3', 'https://picsum.photos/200/300?image=4'];
var refreshIntervalId = setInterval(function() {
image = document.getElementById('hiddenimageid');
image.src = images[hiddenimgnumber];
}, 1)
function hiddenimage() {
clearInterval(refreshIntervalId);
image = document.getElementById('hiddenimageid');
image.src = images[hiddenimgnumber];
//console.log(hiddenimgnumber);
hiddenimgnumber++;
}
window.onload = function() {}
function rvalue() {
elements = document.getElementsByClassName("box");
for (var i = 0; i < elements.length; i++) {
//debugger;
elements[i].style.border = "2px solid #c57232 ";
elements[i].style.borderBottom = "5px solid #c57232 ";
//object.style.borderRadius = "1-4 length|% / 1-4 length|%|initial|inherit"
}
ptags = document.querySelectorAll('[name="values"]');
boxtags = document.getElementsByClassName("box");
if (array2.length === 0) {
alert('Game completed');
return;
}
for (var index = 0; index < 3; index++) {
randomIndex = Math.floor(Math.random() * array2.length)
item = array2[randomIndex];
array2.splice(randomIndex, 1);
try {
//ptags[index].style.visibility = "visible";
//ptags[index].textContent = "RS."+item.label;
ptags[index].dataset.itemLabel = item.label;
//using label as an identity
tempimages.push({
data: item,
label: item.label
});
notesselected.push({
data: item.url,
label: item.label
});
boxtags[index].style.backgroundImage = 'url(' + item.url + ')';
} catch (err) {
// console.log('Exception');
}
}
var tlen = tempimages.length;
}
function displayAllImages() {
try {
if (tempimages.length == 0) {
rvalue();
}
if (tempimages.length === 0) {
image = document.getElementById('slide');
image.style.display = 'none';
return;
}
var arr2 = tempimages;
item = arr2[Math.floor(Math.random() * arr2.length)]
image = document.getElementById('slide');
//getting notes item
//console.log(item);
///////console.log(item.label);
var dataURL = notes.filter(a => a.indexOf("?text=" + item.label) > 0)[0];
//var dataURL =item.url;
//var dataURL = item.label;
console.log(dataURL);
image.src = dataURL;
image.dataset.itemLabel = item.label;
} catch (err) {
}
};
$(function() {
displayAllImages();
});
function allowDrop(ev) {
ev.preventDefault();
}
function drag(ev) {
ev.dataTransfer.setData("Text", ev.target.id);
}
function drop(ev) {
ev.preventDefault();
var data = ev.dataTransfer.getData("Text");
var x = document.getElementById("slide").dataset.itemLabel;
var y = ev.target.dataset.itemLabel;
if (ev.target.tagName === "DIV") {
y = ev.target.children[0].dataset.itemLabel;
}
if (x == y) {
ev.currentTarget.style.backgroundColor = 'initial';
ev.currentTarget.style.backgroundImage = 'initial';
ev.currentTarget.style.border = 'initial';
var pParagraph = ev.currentTarget.firstElementChild;
pParagraph.style.visibility = "hidden";
item = this.item;
tempimages = tempimages.filter(a => a.label !== item.label);
if (tempimages.length == 0) {
rvalue();
hiddenimage();
animateCongrat();
}
displayAllImages();
} else {
}
}
//animate congarat starts here
var timeOut;
function animateCongrat() {
$('.congrats').show();
clearTimeout(timeOut);
addBlueBody();
hideCongratAndBlueBody();
}
function addBlueBody() {
$("html").css("background-color", " #070755 ");
$('body').addClass('bodyblue')
$('#container').hide();
$('#2container').hide();
$('#3container').hide();
$('#2').hide();
$('.completed').hide();
}
function hideCongratAndBlueBody() {
timeOut = setTimeout(() => {
$('.congrats').hide();
$("html").css("background-color", "");
$('body').removeClass('bodyblue')
$('#container').show();
$('#2container').show();
$('#3container').show();
$('#2').show();
$('.completed').hide();
changemainbackground();
}, 5000);
}
body {
overflow: hidden;
}
.dashed {
border: 2px dashed #999 !important;
}
.bodyblue {
background-image: url(https://via.placeholder.com/1000x600?text=Middle+bg);
height: 100vh;
width: 100vw;
}
ul {
-moz-border-radius: 50%;
-webkit-border-radius: 50%;
}
.box {
width: calc(33.3% - 4px);
border-radius: 5px;
border: #000 border-color: #e6e600;
margin: -2px;
background-color: #99ffff;
height: 16vh;
display: inline-flex;
align-items: center;
justify-content: center;
background-repeat: no-repeat;
background-size: cover;
cursor: pointer;
}
.box002 {
position: absolute;
top: 30.3vh;
left: 50.98vw;
cursor: pointer;
border: 2px solid white;
}
.box002 img {
width: 15.0vw;
height: 15.0vh;
border-radius: 0%;
}
#container {
white-space: nowrap;
border: px solid #CC0000;
}
.containerr {
border: px solid #FF3399;
}
.pic {
background-size: 100% 100%;
}
.container2 {
width: 29.0vw;
position: fixed;
top: 10.9vh;
left: 19.2vw;
}
body {
background-image: url(https://picsum.photos/200/300?image=0);
background-size: 100vw 100vh;
}
.reset img:hover {
opacity: 1
}
.hiddenimage {
position: absolute;
top: 4.3vh;
left: 50vw;
cursor: pointer;
}
.hiddenimage img {
width: 10.3vw;
height: 10.5vh;
border-radius: 15%;
}
.hand {
position: absolute;
top: 45.3vh;
left: 17vw;
cursor: pointer;
}
.hand img {
width: 25.3vw;
height: 25.5vh;
border-radius: 0%;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<body id="main">
<div class="container2">
<div class="containerr">
<div class="pic" id="content">
<div id="container">
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="10" style="">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="11">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="12">
<p name="values"></p>
</div>
</div>
</div>
</div>
</div>
<div class="box002" draggable="true" ondragstart="drag(event)" id="2">
<img src="" draggable="true" id="slide" border="rounded" />
</div>
<div class="congrats">
<div class="hiddenimage" style="display:none;">
<img src="" id="hiddenimageid" />
</div>
</div>
</body>

Second time values are not taken correctly from an array randomly in Javascript

I have four boxes I selected 4 items from an array items.
I have placed the randomly selected item inside 4 boxes.
Class box002 can be dragged and dropped to corresponding number in four boxes displayed. then digit in box dissappears.
My problem is that after dropping all four boxes correctly, second time values are not filled correctly, ie, reandomly selected values from array **items** does notmatch with **tempimages** stored for displaying in **box002** for dragging and dropping.
How to solve this? And make second level work?
var items = [{
label: '1',
url: 'https://via.placeholder.com/75x75?text=1'
},
{
label: '2',
url: 'https://via.placeholder.com/75x75?text=2'
},
{
label: '3',
url: 'https://via.placeholder.com/75x75?text=3'
},
{
label: '4',
url: 'https://via.placeholder.com/75x75?text=4'
},
{
label: '5',
url: 'https://via.placeholder.com/75x75?text=5'
},
{
label: '6',
url: 'https://via.placeholder.com/75x75?text=6'
},
{
label: '7',
url: 'https://via.placeholder.com/75x75?text=7'
},
{
label: '8',
url: 'https://via.placeholder.com/75x75?text=8'
},
{
label: '9',
url: 'https://via.placeholder.com/75x75?text=9'
},
{
label: '10',
url: 'https://via.placeholder.com/75x75?text=10'
}
];
var tempimages = [];
var array2 = [];
array2 = items.slice();
var backimgcount = 1;
var len = array2.length;
var item;
var displaycounter = 0;
var images = ['https://picsum.photos/200/300', 'https://picsum.photos/g/200/300'];
var index = 0;
function buildImage() {
document.getElementById('content').style.backgroundImage = 'url(images/' + images[index] + ')';
}
function changeImage() {
index++;
if (index >= images.length) index = 0;
document.getElementById('content').style.backgroundImage = 'url(images/' + images[index] + ')';
}
function rvalue() {
elements = document.getElementsByClassName("box");
elements = document.getElementsByClassName("box");
for (var i = 0; i < elements.length; i++) {
elements[i].style.backgroundColor = "#ff66ff";
//elements[i].borderRadius = "2px";
elements[i].style.border = "2px solid #e3a89e ";
//object.style.borderRadius = "1-4 length|% / 1-4 length|%|initial|inherit"
}
ptags = document.querySelectorAll('[name="values"]');
boxtags = document.getElementsByClassName("box");
for (var index = 0; index < 4; index++) {
randomIndex = Math.floor(Math.random() * array2.length)
item = array2[randomIndex];
//item = array2.splice(randomIndex, 1);
ptags[index].style.visibility = "visible";
ptags[index].textContent = item.label;
boxtags[index].style.backgroundImage = 'url(' + item.url + ')';
tempimages.push({
data: item,
index: randomIndex
});
ptags[index].dataset.itemIndex = randomIndex;
}
var tlen = tempimages.length;
}
function displayAllImages() {
if (tempimages.length == 0) {
rvalue();
}
//tempimages = tempimages.concat(tempimages.splice(0,2));
//item = tempimages.splice(0, 1);
function shuffle(array) {
var currentIndex = array.length,
temporaryValue, randomIndex;
// While there remain elements to shuffle...
while (0 !== currentIndex) {
// Pick a remaining element...
randomIndex = Math.floor(Math.random() * currentIndex);
currentIndex -= 1;
// And swap it with the current element.
temporaryValue = array[currentIndex];
array[currentIndex] = array[randomIndex];
array[randomIndex] = temporaryValue;
}
return array;
}
var arr = tempimages;
arr = shuffle(arr);
item = arr.shift();
image = document.getElementById('slide');
image.src = item.data.url;
image.dataset.itemIndex = item.index;
};
$(function() {
displayAllImages();
});
function allowDrop(ev) {
ev.preventDefault();
}
function drag(ev) {
ev.dataTransfer.setData("Text", ev.target.id).classList.add('dashed');
}
function drop(ev) {
ev.preventDefault();
var data = ev.dataTransfer.getData("Text");
var el = document.getElementById(data);
var x = document.getElementById("slide").dataset.itemIndex;
var y = ev.target.dataset.itemIndex;
if (x == y) {
//el.parentNode.removeChild;
ev.currentTarget.style.backgroundColor = 'initial';
ev.currentTarget.style.border = 'initial';
var pParagraph = ev.currentTarget.firstElementChild;
//ev.currentTarget.removeChild(pParagraph);
pParagraph.style.visibility = "hidden";
item = this.item;
var arrayvalue = item.dataindex;
array2.splice(arrayvalue, 1);
//alert("sucessfull");
if (tempimages.length == 0) {
rvalue();
hiddenimage();
//changeImage();
changeImage();
}
displayAllImages();
} else {
playAudio2();
alert("WRONG TIME PLACED");
}
}
body {
overflow: hidden;
}
.box {
width: calc(33.3% - 4px);
display: inline-block;
border-radius: 5px;
border: 2px solid #333;
border: #000 border-color: #e6e600;
margin: -2px;
border-radius: 0%;
background-color: #99ffff;
}
.box {
height: 15vh;
display: inline-flex;
align-items: center;
justify-content: center;
cursor: pointer;
background-size:contain;
}
.box002 {
position: absolute;
top: 27.3vh;
left: 72.98vw;
cursor: pointer;
}
.box002 img {
width: 14.0vw;
height: 23.0vh;
border-radius: 50%;
}
p{
font: "Courier New", Courier, monospace;
font-size:30px;
color: rgba(0,0,0,0.6);
text-shadow: 2px 8px 6px rgba(0,0,0,0.2),
0px -5px 35px rgba(255,255,255,0.3);
color: #005ce6;
text-align: center;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container2">
<div class="containerr">
<div class="pic" id="content">
<div id="container">
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="10">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="11">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="12">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="13">
<p name="values"></p>
</div>
</div>
</div>
</div>
</div>
<div class="box002" draggable="true" ondragstart="drag(event)" id="2">
<img src="" draggable="true" id="slide" border="rounded" />
</div>

I can't even imagine how are you work with this code. Before posting example on stackoverflow try to clear it (remove unused code, remove function that doesn't exists).
Issues:
1) drag function, .classlist was commented out
2) playAudio2 was commented out
3) hiddenimage function was commented out
4) ok, maybe index should be on p tag, but it's can be figured out from example (maybe you should add to boxtags too.
So, on this example you can see, that second time values working properly, but when all images are finished there is some new issues.
var items = [{
label: '1',
url: 'https://via.placeholder.com/75x75?text=1'
},
{
label: '2',
url: 'https://via.placeholder.com/75x75?text=2'
},
{
label: '3',
url: 'https://via.placeholder.com/75x75?text=3'
},
{
label: '4',
url: 'https://via.placeholder.com/75x75?text=4'
},
{
label: '5',
url: 'https://via.placeholder.com/75x75?text=5'
},
{
label: '6',
url: 'https://via.placeholder.com/75x75?text=6'
},
{
label: '7',
url: 'https://via.placeholder.com/75x75?text=7'
},
{
label: '8',
url: 'https://via.placeholder.com/75x75?text=8'
},
{
label: '9',
url: 'https://via.placeholder.com/75x75?text=9'
},
{
label: '10',
url: 'https://via.placeholder.com/75x75?text=10'
}
];
var tempimages = [];
var array2 = [];
array2 = items.slice();
var backimgcount = 1;
var len = array2.length;
var item;
var displaycounter = 0;
var images = ['https://picsum.photos/200/300', 'https://picsum.photos/g/200/300'];
var index = 0;
function buildImage() {
document.getElementById('content').style.backgroundImage = 'url(images/' + images[index] + ')';
}
function changeImage() {
index++;
if (index >= images.length) index = 0;
document.getElementById('content').style.backgroundImage = 'url(images/' + images[index] + ')';
}
function rvalue() {
elements = document.getElementsByClassName("box");
elements = document.getElementsByClassName("box");
for (var i = 0; i < elements.length; i++) {
elements[i].style.backgroundColor = "#ff66ff";
//elements[i].borderRadius = "2px";
elements[i].style.border = "2px solid #e3a89e ";
//object.style.borderRadius = "1-4 length|% / 1-4 length|%|initial|inherit"
}
ptags = document.querySelectorAll('[name="values"]');
boxtags = document.getElementsByClassName("box");
debugger;
for (var index = 0; index < 4; index++) {
randomIndex = Math.floor(Math.random() * array2.length)
item = array2[randomIndex];
//item = array2.splice(randomIndex, 1);
ptags[index].style.visibility = "visible";
ptags[index].textContent = item.label;
boxtags[index].style.backgroundImage = 'url(' + item.url + ')';
tempimages.push({
data: item,
index: randomIndex
});
ptags[index].dataset.itemIndex = randomIndex;
}
var tlen = tempimages.length;
}
function displayAllImages() {
if (tempimages.length == 0) {
rvalue();
}
//tempimages = tempimages.concat(tempimages.splice(0,2));
//item = tempimages.splice(0, 1);
function shuffle(array) {
var currentIndex = array.length,
temporaryValue, randomIndex;
// While there remain elements to shuffle...
while (0 !== currentIndex) {
// Pick a remaining element...
randomIndex = Math.floor(Math.random() * currentIndex);
currentIndex -= 1;
// And swap it with the current element.
temporaryValue = array[currentIndex];
array[currentIndex] = array[randomIndex];
array[randomIndex] = temporaryValue;
}
return array;
}
var arr = tempimages;
arr = shuffle(arr);
item = arr.shift();
image = document.getElementById('slide');
image.src = item.data.url;
image.dataset.itemIndex = item.index;
};
$(function() {
displayAllImages();
});
function allowDrop(ev) {
ev.preventDefault();
}
function drag(ev) {
ev.dataTransfer.setData("Text", ev.target.id);//.classList.add('dashed');
}
function drop(ev) {
ev.preventDefault();
var data = ev.dataTransfer.getData("Text");
var el = document.getElementById(data);
var x = document.getElementById("slide").dataset.itemIndex;
var y = ev.target.dataset.itemIndex;
if (x == y) {
//el.parentNode.removeChild;
ev.currentTarget.style.backgroundColor = 'initial';
ev.currentTarget.style.border = 'initial';
var pParagraph = ev.currentTarget.firstElementChild;
//ev.currentTarget.removeChild(pParagraph);
pParagraph.style.visibility = "hidden";
item = this.item;
var arrayvalue = item.dataindex;
array2.splice(arrayvalue, 1);
//alert("sucessfull");
if (tempimages.length == 0) {
rvalue();
//hiddenimage();
//changeImage();
changeImage();
}
displayAllImages();
} else {
//playAudio2();
alert("WRONG TIME PLACED");
}
}
body {
overflow: hidden;
}
.box {
width: calc(33.3% - 4px);
display: inline-block;
border-radius: 5px;
border: 2px solid #333;
border: #000 border-color: #e6e600;
margin: -2px;
border-radius: 0%;
background-color: #99ffff;
}
.box {
height: 15vh;
display: inline-flex;
align-items: center;
justify-content: center;
cursor: pointer;
background-size:contain;
}
.box002 {
position: absolute;
top: 27.3vh;
left: 72.98vw;
cursor: pointer;
}
.box002 img {
width: 14.0vw;
height: 23.0vh;
border-radius: 50%;
}
p{
font: "Courier New", Courier, monospace;
font-size:30px;
color: rgba(0,0,0,0.6);
text-shadow: 2px 8px 6px rgba(0,0,0,0.2),
0px -5px 35px rgba(255,255,255,0.3);
color: #005ce6;
text-align: center;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container2">
<div class="containerr">
<div class="pic" id="content">
<div id="container">
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="10">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="11">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="12">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="13">
<p name="values"></p>
</div>
</div>
</div>
</div>
</div>
<div class="box002" draggable="true" ondragstart="drag(event)" id="2">
<img src="" draggable="true" id="slide" border="rounded" />
</div>

How to check if two itemIndex is same in javascript

I have a drag and drop code in which ROUNDBOX can be dragged and dropped to RECTANGULARBOX in which IMAGEnumber in rectangularbox is same as ROUNDBOXdigit.
I have taken the itemIndex of the dragged item to X
x=document.getElementById("slide").dataset.itemIndex;
and itemIndex of Imagenumber toY
y=tempimages[randomIndex].index;
I want to check a condition if(x==y) if only then it allows drop.
But im not able check the condition,
How to change my code to achieve this property? where is the mistake
var randomIndex;
var array2 = [];
var item;
var tempimages = [];
var notesselected = [];
var items = [
{label:'1',url:'https://via.placeholder.com/150x150.jpg?text=image1'},
{label:'2',url:'https://via.placeholder.com/150x150.jpg?text=image2'},
{label:'3',url:'https://via.placeholder.com/150x150.jpg?text=image3'},
{label:'4',url:'https://via.placeholder.com/150x150.jpg?text=image4'},
{label:'5',url:'https://via.placeholder.com/150x150.jpg?text=image5'},
{label:'6',url:'https://via.placeholder.com/150x150.jpg?text=image6'},
{label:'7',url:'https://via.placeholder.com/150x150.jpg?text=image7'},
{label:'8',url:'https://via.placeholder.com/150x150.jpg?text=image8'},
{label:'9',url:'https://via.placeholder.com/150x150.jpg?text=image9'}];
var notes = [
'https://via.placeholder.com/75x75?text=1',
'https://via.placeholder.com/75x75?text=2',
'https://via.placeholder.com/75x75?text=3',
'https://via.placeholder.com/75x75?text=4', 'https://via.placeholder.com/75x75?text=5',
'https://via.placeholder.com/75x75?text=6',
'https://via.placeholder.com/75x75?text=7',
'https://via.placeholder.com/75x75?text=8',
'https://via.placeholder.com/75x75?text=9'
];
array2 = items.slice();
notes2 = notes.slice();
boxtags = document.getElementsByClassName("box");
function rvalue()
{
for (var index = 0; index < 3; index++)
{
randomIndex = Math.floor(Math.random() *array2.length)
item = array2[randomIndex];
tempimages.push({data: item,index: randomIndex });
notesselected.push({data: notes2[randomIndex],index: randomIndex});
boxtags[index].style.backgroundImage = 'url(' + item.url + ')';
array2.splice(randomIndex, 1);
notes2.splice(randomIndex, 1);
}
}
function allowDrop(ev) {
ev.preventDefault();
}
function drag(ev) {
ev.dataTransfer.setData("Text", ev.target.id);
}
function drop(ev) {
ev.preventDefault();
var data = ev.dataTransfer.getData("Text");
var el = document.getElementById(data);
var x=document.getElementById("slide").dataset.itemIndex;
if(typeof tempimages[randomIndex] !== 'undefined')
{ var y = tempimages[randomIndex].index; }
console.log(x);
console.log(y);
if(x==y)
{
ev.currentTarget.style.backgroundColor = 'initial';
ev.currentTarget.style.backgroundImage = 'initial';
ev.currentTarget.style.border = 'initial';
var pParagraph = ev.currentTarget.firstElementChild;
pParagraph.style.visibility = "hidden";
item = this.item;
var arrayvalue = item.dataindex;
tempimages.splice(arrayvalue, 1);
if (tempimages.length == 0) {
rvalue();
}
displayAllImages();
}
}
function displayAllImages()
{
if (tempimages.length == 0)
{
rvalue();
}
var arr2=notesselected;
item = arr2.shift();
image = document.getElementById('slide');
image.src =item.data;
image.dataset.itemIndex = item.index;
}
$(function() {
displayAllImages();
});
.box {
width: calc(33.3% - 4px);
display: inline-block;
border-radius: 5px;
border: 2px solid #333;
margin: -2px;
border-radius: 0%;
}
.box {
height: 15vh;
display: inline-flex;
align-items: center;
justify-content: center;
cursor: pointer;
background-size: contain;
}
.box002 {
position: absolute;
top: 25.3vh;
left: 40.98vw;
cursor: pointer;
}
.box002 img {
width: 14.0vw;
height: 23.0vh;
border-radius: 50%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container2">
<div class="containerr">
<div class="pic" id="content">
<div id="container">
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="10">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="11">
<p name="values"></p>
</div>
<div class="box" ondrop="drop(event)" ondragover="allowDrop(event)" id="12">
<p name="values"></p>
</div>
</div>
</div>
</div>
</div>
<div class="box002" draggable="true" ondragstart="drag(event)" id="2">
<img src="" draggable="true" id="slide" border="rounded" />
</div>

How to build simple jQuery image slider with sliding or opacity effect?

Some of us might not want to use ready plugins because of their high sizes and possibilty of creating conflicts with current javascript.
I was using light slider plugins before but when customer gives modular revise, it became really hard to manipulate. Then I aim to build mine for customising it easily. I believe sliders shouldn't be that complex to build from beginning.
What is a simple and clean way to build jQuery image slider?

Before inspecting examples, you should know two jQuery functions which i used most.
index() returns value is an integer indicating the position of the first element within the jQuery object relative to its sibling elements.
eq() selects of an element based on its position (index value).
Basicly i take selected trigger element's index value and match this value on images with eq method.
- FadeIn / FadeOut effect.
- Sliding effect.
- alternate Mousewheel response.
​html sample:
<ul class="images">
<li>
<img src="images/1.jpg" alt="1" />
</li>
<li>
<img src="images/2.jpg" alt="2" />
</li>
...
</ul>
<ul class="triggers">
<li>1</li>
<li>2</li>
...
</ul>
<span class="control prev">Prev</span>
<span class="control next">Next</span>
OPACITY EFFECT: jsFiddle.
css trick: overlapping images with position:absolute
ul.images { position:relative; }
ul.images li { position:absolute; }
jQuery:
var target;
var triggers = $('ul.triggers li');
var images = $('ul.images li');
var lastElem = triggers.length-1;
triggers.first().addClass('active');
images.hide().first().show();
function sliderResponse(target) {
images.fadeOut(300).eq(target).fadeIn(300);
triggers.removeClass('active').eq(target).addClass('active');
}
SLIDING EFFECT: jsFiddle.
css trick: with double wrapper and use child as mask
.mask { float:left; margin:40px; width:270px; height:266px; overflow:hidden; }
ul.images { position:relative; top:0px;left:0px; }
/* this width must be total of the images, it comes from jquery */
ul.images li { float:left; }
jQuery:
var target;
var triggers = $('ul.triggers li');
var images = $('ul.images li');
var lastElem = triggers.length-1;
var mask = $('.mask ul.images');
var imgWidth = images.width();
triggers.first().addClass('active');
mask.css('width', imgWidth*(lastElem+1) +'px');
function sliderResponse(target) {
mask.stop(true,false).animate({'left':'-'+ imgWidth*target +'px'},300);
triggers.removeClass('active').eq(target).addClass('active');
}
Common jQuery response for both slider:
( triggers + next/prev click and timing )
triggers.click(function() {
if ( !$(this).hasClass('active') ) {
target = $(this).index();
sliderResponse(target);
resetTiming();
}
});
$('.next').click(function() {
target = $('ul.triggers li.active').index();
target === lastElem ? target = 0 : target = target+1;
sliderResponse(target);
resetTiming();
});
$('.prev').click(function() {
target = $('ul.triggers li.active').index();
lastElem = triggers.length-1;
target === 0 ? target = lastElem : target = target-1;
sliderResponse(target);
resetTiming();
});
function sliderTiming() {
target = $('ul.triggers li.active').index();
target === lastElem ? target = 0 : target = target+1;
sliderResponse(target);
}
var timingRun = setInterval(function() { sliderTiming(); },5000);
function resetTiming() {
clearInterval(timingRun);
timingRun = setInterval(function() { sliderTiming(); },5000);
}

Here is a simple and easy to understand code for Creating image slideshow using JavaScript without using Jquery.
<script language="JavaScript">
var i = 0; var path = new Array();
// LIST OF IMAGES
path[0] = "image_1.gif";
path[1] = "image_2.gif";
path[2] = "image_3.gif";
function swapImage() { document.slide.src = path[i];
if(i < path.length - 1) i++;
else i = 0; setTimeout("swapImage()",3000);
} window.onload=swapImage;
</script>
<img height="200" name="slide" src="image_1.gif" width="400" />

I have recently created a solution with a gallery of images and a slider that apears when an image is clicked.
Take a look at the code here: GitHub Code
And a live example here: Code Example
var CreateGallery = function(parameters) {
var self = this;
this.galleryImages = [];
this.galleryImagesSrcs = [];
this.galleryImagesNum = 0;
this.counter;
this.galleryTitle = parameters.galleryTitle != undefined ? parameters.galleryTitle : 'Gallery image';
this.maxMobileWidth = parameters.maxMobileWidth != undefined ? parameters.maxMobileWidth : 768;
this.numMobileImg = parameters.numMobileImg != undefined ? parameters.numMobileImg : 2;
this.maxTabletWidth = parameters.maxTabletWidth != undefined ? parameters.maxTabletWidth : 1024;
this.numTabletImg = parameters.numTabletImg != undefined ? parameters.numTabletImg : 3;
this.addModalGallery = function(gallerySelf = self){
var $div = $(document.createElement('div')).attr({
'id': 'modal-gallery'
}).append($(document.createElement('div')).attr({
'class': 'header'
}).append($(document.createElement('button')).attr({
'class': 'close-button',
'type': 'button'
}).html('×')
).append($(document.createElement('h2')).text(gallerySelf.galleryTitle))
).append($(document.createElement('div')).attr({
'class': 'text-center'
}).append($(document.createElement('img')).attr({
'id': 'gallery-img'
})
).append($(document.createElement('button')).attr({
'class': 'prev-button',
'type': 'button'
}).html('◄')
).append($(document.createElement('button')).attr({
'class': 'next-button',
'type': 'button'
}).html('►')
)
);
parameters.element.after($div);
};
$(document).on('click', 'button.prev-button', {self: self}, function() {
var $currImg = self.counter >= 1 ? self.galleryImages[--self.counter] : self.galleryImages[self.counter];
var $currHash = self.galleryImagesSrcs[self.counter];
var $src = $currImg.src;
window.location.hash = $currHash;
$('img#gallery-img').attr('src', $src);
$('div#modal-gallery h2').text(self.galleryTitle + ' ' + (self.counter + 1));
});
$(document).on('click', 'button.next-button', {self: self}, function() {
var $currImg = self.counter < (self.galleryImagesNum - 1) ? self.galleryImages[++self.counter] : self.galleryImages[self.counter];
var $currHash = self.galleryImagesSrcs[self.counter];
var $src = $currImg.src;
window.location.hash = $currHash;
$('img#gallery-img').attr('src', $src);
$('div#modal-gallery h2').text(self.galleryTitle + ' ' + (self.counter + 1));
});
$(document).on('click', 'div#modal-gallery button.close-button', function() {
$('#modal-gallery').css('position', 'relative');
$('#modal-gallery').hide();
$('body').css('overflow', 'visible');
});
parameters.element.find('a').on('click', {self: self}, function(event) {
event.preventDefault();
$('#modal-gallery').css('position', 'fixed');
$('#modal-gallery').show();
$('body').css('overflow', 'hidden');
var $currHash = this.hash.substr(1);
self.counter = self.galleryImagesSrcs.indexOf($currHash);
var $src = $currHash;
window.location.hash = $currHash;
$('img#gallery-img').attr('src', $src);
$('div#modal-gallery h2').text(self.galleryTitle + ' ' + (self.counter + 1));
});
this.sizeGallery = function(gallerySelf = self) {
var $modalGallery = $(document).find("div#modal-gallery");
if($modalGallery.length <= 0) {
this.addModalGallery();
}
var $windowWidth = $(window).width();
var $parentWidth = parameters.element.width();
var $thumbnailHref = parameters.element.find('img:first').attr('src');
if($windowWidth < gallerySelf.maxMobileWidth) {
var percentMobile = Math.floor(100 / gallerySelf.numMobileImg);
var emMobile = 0;
var pxMobile = 2;
// var emMobile = gallerySelf.numMobileImg * 0.4;
// var pxMobile = gallerySelf.numMobileImg * 2;
parameters.element.find('img').css('width', 'calc('+percentMobile+'% - '+emMobile+'em - '+pxMobile+'px)');
} else if($windowWidth < gallerySelf.maxTabletWidth) {
var percentTablet = Math.floor(100 / gallerySelf.numTabletImg);
var emTablet = 0;
var pxTablet = 2;
// var emTablet = gallerySelf.numMobileImg * 0.4;
// var pxTablet = gallerySelf.numMobileImg * 2;
parameters.element.find('img').css('width', 'calc('+percentTablet+'% - '+emTablet+'em - '+pxTablet+'px)');
} else {
var $thumbImg = new Image();
$thumbImg.src = $thumbnailHref;
$thumbImg.onload = function() {
var $thumbnailWidth = this.width;
if($parentWidth > 0 && $thumbnailWidth > 0) {
parameters.element.find('img').css('width', (Math.ceil($thumbnailWidth * 100 / $parentWidth))+'%');
}
};
}
};
this.startGallery = function(gallerySelf = self) {
parameters.element.find('a').each(function(index, el) {
var $currHash = el.hash.substr(1);
var $img = new Image();
$img.src = $currHash;
gallerySelf.galleryImages.push($img);
gallerySelf.galleryImagesSrcs.push($currHash);
});
this.galleryImagesNum = this.galleryImages.length;
};
this.sizeGallery();
this.startGallery();
};
var myGallery;
$(window).on('load', function() {
myGallery = new CreateGallery({
element: $('#div-gallery'),
maxMobileWidth: 768,
numMobileImg: 2,
maxTabletWidth: 1024,
numTabletImg: 3
});
});
$(window).on('resize', function() {
myGallery.sizeGallery();
});
#div-gallery {
text-align: center;
}
#div-gallery img {
margin-right: auto;
margin-left: auto;
}
div#modal-gallery {
top: 0;
left: 0;
width: 100%;
max-width: none;
height: 100vh;
min-height: 100vh;
margin-left: 0;
border: 0;
border-radius: 0;
z-index: 1006;
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
display: none;
background-color: #fefefe;
position: relative;
margin-right: auto;
overflow-y: auto;
padding: 0;
}
div#modal-gallery div.header {
position: relative;
}
div#modal-gallery div.header h2 {
margin-left: 1rem;
}
div#modal-gallery div.header button.close-button {
position: absolute;
top: calc(50% - 1em);
right: 1rem;
}
div#modal-gallery img {
display: block;
max-width: 98%;
max-height: calc(100vh - 5em);
margin-right: auto;
margin-left: auto;
}
div#modal-gallery div.text-center {
position: relative;
}
button.close-button {
display: inline-block;
padding: 6px 12px;
margin-bottom: 0;
font-size: 20px;
font-weight: 400;
line-height: 1.42857143;
text-align: center;
white-space: nowrap;
vertical-align: middle;
-ms-touch-action: manipulation;
touch-action: manipulation;
cursor: pointer;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
background-image: none;
border: 1px solid transparent;
border-radius: 4px;
color: #333;
background-color: #fff;
border-color: #ccc;
}
button.close-button:hover, button.close-button:focus {
background-color: #ddd;
}
button.next-button:hover, button.prev-button:hover, button.next-button:focus, button.prev-button:focus {
color: #fff;
text-decoration: none;
filter: alpha(opacity=90);
outline: 0;
opacity: .9;
}
button.next-button, button.prev-button {
position: absolute;
top: 0;
bottom: 0;
left: 0;
width: 15%;
font-size: 20px;
color: #fff;
text-align: center;
text-shadow: 0 1px 2px rgba(0,0,0,.6);
background-color: rgba(0,0,0,0);
filter: alpha(opacity=50);
opacity: .5;
border: none;
}
button.next-button {
right: 0;
left: auto;
background-image: -webkit-linear-gradient(left,rgba(0,0,0,.0001) 0,rgba(0,0,0,.5) 100%);
background-image: -o-linear-gradient(left,rgba(0,0,0,.0001) 0,rgba(0,0,0,.5) 100%);
background-image: -webkit-gradient(linear,left top,right top,from(rgba(0,0,0,.0001)),to(rgba(0,0,0,.5)));
background-image: linear-gradient(to right,rgba(0,0,0,.0001) 0,rgba(0,0,0,.5) 100%);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#00000000', endColorstr='#80000000', GradientType=1);
background-repeat: repeat-x;
}
button.prev-button {
background-image: -webkit-linear-gradient(left,rgba(0,0,0,.5) 0,rgba(0,0,0,.0001) 100%);
background-image: -o-linear-gradient(left,rgba(0,0,0,.5) 0,rgba(0,0,0,.0001) 100%);
background-image: -webkit-gradient(linear,left top,right top,from(rgba(0,0,0,.5)),to(rgba(0,0,0,.0001)));
background-image: linear-gradient(to right,rgba(0,0,0,.5) 0,rgba(0,0,0,.0001) 100%);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#80000000', endColorstr='#00000000', GradientType=1);
background-repeat: repeat-x;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="div-gallery">
<img src="http://placehold.it/300x300/ff0000/000000?text=Gallery+image+1" alt="">
<img src="http://placehold.it/300x300/ff4000/000000?text=Gallery+image+2" alt="">
<img src="http://placehold.it/300x300/ff8000/000000?text=Gallery+image+3" alt="">
<img src="http://placehold.it/300x300/ffbf00/000000?text=Gallery+image+4" alt="">
<img src="http://placehold.it/300x300/ffff00/000000?text=Gallery+image+5" alt="">
<img src="http://placehold.it/300x300/bfff00/000000?text=Gallery+image+6" alt="">
<img src="http://placehold.it/300x300/80ff00/000000?text=Gallery+image+7" alt="">
<img src="http://placehold.it/300x300/40ff00/000000?text=Gallery+image+8" alt="">
<img src="http://placehold.it/300x300/00ff00/000000?text=Gallery+image+9" alt="">
<img src="http://placehold.it/300x300/00ff40/000000?text=Gallery+image+10" alt="">
<img src="http://placehold.it/300x300/00ff80/000000?text=Gallery+image+11" alt="">
<img src="http://placehold.it/300x300/00ffbf/000000?text=Gallery+image+12" alt="">
<img src="http://placehold.it/300x300/00ffff/000000?text=Gallery+image+13" alt="">
<img src="http://placehold.it/300x300/00bfff/000000?text=Gallery+image+14" alt="">
<img src="http://placehold.it/300x300/0080ff/000000?text=Gallery+image+15" alt="">
<img src="http://placehold.it/300x300/0040ff/000000?text=Gallery+image+16" alt="">
</div>

Checkout this whole bunch of code to build simple jquery image slider. Copy and save this file to local machine and test it. You can modify it according to your requirement.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script>
var current_img = 1;
var i;
$(document).ready(function(){
var imgs = $("#image").find("img");
function show_img(){
for (i = 1; i < imgs.length+1; i++) {
if(i == current_img){
$(imgs[i-1]).show();
}else{
$(imgs[i-1]).hide()
}
}
}
$("#prev").click(function(){
if(current_img == 1){
current_img = imgs.length;
}else{
current_img = current_img - 1
}
show_img();
});
$("#next").click(function(){
if(current_img == imgs.length){
current_img = 1;
}else{
current_img = current_img + 1
}
show_img();
});
});
</script>
</head>
<body>
<div style="margin-top: 100px;"></div>
<div class="container">
<div class="col-sm-3">
<button type="button" id="prev" class="btn">Previous</button>
</div>
<div class="col-sm-6">
<div id="image">
<img src="https://www.w3schools.com/html/pulpitrock.jpg" alt="image1">
<img src="https://www.w3schools.com/cSS/img_forest.jpg" alt="image2" hidden="true" style="max-width: 500px;">
<img src="https://www.w3schools.com/html/img_chania.jpg" alt="image3" hidden="true">
</div>
</div>
<div class="col-sm-3">
<button type="button" id="next" class="btn">Next</button>
</div>
</div>
</body>
</html>

I have written a tutorial on creating a slideshow, The tutorial page
In case the link becomes invalid I have included the code in my answer below.
the html:
<div id="slideShow">
<div id="slideShowWindow">
<div class="slide">
<img src="”img1.png”/">
<div class="slideText">
<h2>The Slide Title</h2>
<p>This is the slide text</p>
</div> <!-- </slideText> -->
</div> <!-- </slide> repeat as many times as needed -->
</div> <!-- </slideShowWindow> -->
</div> <!-- </slideshow> -->
css:
img {
display: block;
width: 100%;
height: auto;
}
p{
background:none;
color:#ffffff;
}
#slideShow #slideShowWindow {
width: 650px;
height: 450px;
margin: 0;
padding: 0;
position: relative;
overflow:hidden;
margin-left: auto;
margin-right:auto;
}
#slideShow #slideShowWindow .slide {
margin: 0;
padding: 0;
width: 650px;
height: 450px;
float: left;
position: relative;
margin-left:auto;
margin-right: auto;
}
#slideshow #slideshowWindow .slide, .slideText {
position:absolute;
bottom:18px;
left:0;
width:100%;
height:auto;
margin:0;
padding:0;
color:#ffffff;
font-family:Myriad Pro, Arial, Helvetica, sans-serif;
}
.slideText {
background: rgba(128, 128, 128, 0.49);
}
#slideshow #slideshowWindow .slide .slideText h2,
#slideshow #slideshowWindow .slide .slideText p {
margin:10px;
padding:15px;
}
.slideNav {
display: block;
text-indent: -10000px;
position: absolute;
cursor: pointer;
}
#leftNav {
left: 0;
bottom: 0;
width: 48px;
height: 48px;
background-image: url("../Images/plus_add_minus.png");
background-repeat: no-repeat;
z-index: 10;
}
#rightNav {
right: 0;
bottom: 0;
width: 48px;
height: 48px;
background-image: url("../Images/plus_add_green.png");
background-repeat: no-repeat;
z-index: 10; }
jQuery:
$(document).ready(function () {
var currentPosition = 0;
var slideWidth = 650;
var slides = $('.slide');
var numberOfSlides = slides.length;
var slideShowInterval;
var speed = 3000;
//Assign a timer, so it will run periodically
slideShowInterval = setInterval(changePosition, speed);
slides.wrapAll('<div id="slidesHolder"></div>');
slides.css({ 'float': 'left' });
//set #slidesHolder width equal to the total width of all the slides
$('#slidesHolder').css('width', slideWidth * numberOfSlides);
$('#slideShowWindow')
.prepend('<span class="slideNav" id="leftNav">Move Left</span>')
.append('<span class="slideNav" id="rightNav">Move Right</span>');
manageNav(currentPosition);
//tell the buttons what to do when clicked
$('.slideNav').bind('click', function () {
//determine new position
currentPosition = ($(this).attr('id') === 'rightNav')
? currentPosition + 1 : currentPosition - 1;
//hide/show controls
manageNav(currentPosition);
clearInterval(slideShowInterval);
slideShowInterval = setInterval(changePosition, speed);
moveSlide();
});
function manageNav(position) {
//hide left arrow if position is first slide
if (position === 0) {
$('#leftNav').hide();
}
else {
$('#leftNav').show();
}
//hide right arrow is slide position is last slide
if (position === numberOfSlides - 1) {
$('#rightNav').hide();
}
else {
$('#rightNav').show();
}
}
//changePosition: this is called when the slide is moved by the timer and NOT when the next or previous buttons are clicked
function changePosition() {
if (currentPosition === numberOfSlides - 1) {
currentPosition = 0;
manageNav(currentPosition);
} else {
currentPosition++;
manageNav(currentPosition);
}
moveSlide();
}
//moveSlide: this function moves the slide
function moveSlide() {
$('#slidesHolder').animate({ 'marginLeft': slideWidth * (-currentPosition) });
}
});