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.
- alternate Mousewheel response.
<strong>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>
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');
}
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 = $('.mask ul.images');
var imgWidth = images.width();
triggers.first().addClass('active');
mask.css('width', imgWidth*(lastElem+1) +'px');
function sliderResponse(target) {
mask.stop(true,false).animate({'left':'-'+ imgWidth*target +'px'},300);
triggers.removeClass('active').eq(target).addClass('active');
}
( triggers + next/prev click and timing )
triggers.click(function() {
if ( !$(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);
}
这是一个简单易懂的代码，用于在不使用 Jquery 的情况下使用 JavaScript 创建图像幻灯片。
<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" />
签出这整串代码来构建简单的 jquery 图像滑块。将此文件复制并保存到本地计算机并进行测试。您可以根据您的要求对其进行修改。
<!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>
我最近创建了一个解决方案，其中包含图像库和单击图像时出现的滑块。
看看这里的代码：GitHub Code
这里有一个活生生的例子：代码示例
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">
<a href="#http://placehold.it/1024x1024/ff0000/000000?text=Gallery+image+1"><img src="http://placehold.it/300x300/ff0000/000000?text=Gallery+image+1" alt=""></a>
<a href="#http://placehold.it/1024x1024/ff4000/000000?text=Gallery+image+2"><img src="http://placehold.it/300x300/ff4000/000000?text=Gallery+image+2" alt=""></a>
<a href="#http://placehold.it/1024x1024/ff8000/000000?text=Gallery+image+3"><img src="http://placehold.it/300x300/ff8000/000000?text=Gallery+image+3" alt=""></a>
<a href="#http://placehold.it/1024x1024/ffbf00/000000?text=Gallery+image+4"><img src="http://placehold.it/300x300/ffbf00/000000?text=Gallery+image+4" alt=""></a>
<a href="#http://placehold.it/1024x1024/ffff00/000000?text=Gallery+image+5"><img src="http://placehold.it/300x300/ffff00/000000?text=Gallery+image+5" alt=""></a>
<a href="#http://placehold.it/1024x1024/bfff00/000000?text=Gallery+image+6"><img src="http://placehold.it/300x300/bfff00/000000?text=Gallery+image+6" alt=""></a>
<a href="#http://placehold.it/1024x1024/80ff00/000000?text=Gallery+image+7"><img src="http://placehold.it/300x300/80ff00/000000?text=Gallery+image+7" alt=""></a>
<a href="#http://placehold.it/1024x1024/40ff00/000000?text=Gallery+image+8"><img src="http://placehold.it/300x300/40ff00/000000?text=Gallery+image+8" alt=""></a>
<a href="#http://placehold.it/1024x1024/00ff00/000000?text=Gallery+image+9"><img src="http://placehold.it/300x300/00ff00/000000?text=Gallery+image+9" alt=""></a>
<a href="#http://placehold.it/1024x1024/00ff40/000000?text=Gallery+image+10"><img src="http://placehold.it/300x300/00ff40/000000?text=Gallery+image+10" alt=""></a>
<a href="#http://placehold.it/1024x1024/00ff80/000000?text=Gallery+image+11"><img src="http://placehold.it/300x300/00ff80/000000?text=Gallery+image+11" alt=""></a>
<a href="#http://placehold.it/1024x1024/00ffbf/000000?text=Gallery+image+12"><img src="http://placehold.it/300x300/00ffbf/000000?text=Gallery+image+12" alt=""></a>
<a href="#http://placehold.it/1024x1024/00ffff/000000?text=Gallery+image+13"><img src="http://placehold.it/300x300/00ffff/000000?text=Gallery+image+13" alt=""></a>
<a href="#http://placehold.it/1024x1024/00bfff/000000?text=Gallery+image+14"><img src="http://placehold.it/300x300/00bfff/000000?text=Gallery+image+14" alt=""></a>
<a href="#http://placehold.it/1024x1024/0080ff/000000?text=Gallery+image+15"><img src="http://placehold.it/300x300/0080ff/000000?text=Gallery+image+15" alt=""></a>
<a href="#http://placehold.it/1024x1024/0040ff/000000?text=Gallery+image+16"><img src="http://placehold.it/300x300/0040ff/000000?text=Gallery+image+16" alt=""></a>
</div>我已经写了一个关于创建幻灯片的教程，教程页面 如果链接失效，我在下面的答案中包含了代码。
的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) });
}
});