我有一个简单的图像滑块，带有分页控件。我已经对其进行了编码以在分页上添加和删除"活动"类点击按钮。我也希望他们在显示相应的幻灯片时拥有活动类。如何修改代码以实现此目标？
<div id="slideshow">
<ul id="slides">
<li class="slide showing">
<div class="slide-description">
<h1 class="slide-title">All-in-one EV charging solution.</h1>
<p> Easy to use. Connected with smart charging capabilities. Our charging stations can be used at home,
work or in public.</p>
</div>
</li>
<li class="slide">
<div class="slide-description">
<h1 class="slide-title">Charging at work- a case study.</h1>
<p>In this new series of charging case studies, we dive into into the reasons why EV-Box partners are taking the green route.</p>
</div>
</li>
<li class="slide"> <div class="slide-description">
<h1 class="slide-title">Finding the best solution for your charging routine.</h1>
<p>
This whitepaper highlights the key answers that will guide you to acharging solution that best serves your needs.
</p>
</div>
</li>
</ul>
<button class="controls" id="previous"></button>
<button class="controls" id="next"></button>
<div id="pagination"></div>
var slides = document.querySelectorAll('#slides .slide'); // get all the slides
var currentSlide = 0;
var slideInterval = setInterval(nextSlide, 6000);
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';
}
//Previous and Next controls
var next = document.getElementById('next');
var previous = document.getElementById('previous');
next.onclick = function() {
nextSlide();
};
previous.onclick = function() {
previousSlide();
};
//Pagination controls
var p = document.getElementById('pagination');
var phtml = '';
for(var i = 0; i < slides.length; i++) {
phtml += '<button></button>'; // create the pagination buttons for each slide
}
p.innerHTML = phtml; //insert the html for the buttons
var pbuttons = p.querySelectorAll('button'); // grab all the buttons
var activeButton = null; // reference to active button
for(var i = 0; i < pbuttons.length; i++) {
pbuttons[i].onclick = (function(n) {
return function() {
if(activeButton)
activeButton.classList.remove('active'); // delete class from old active button
activeButton = this;// change ref, this is current button
activeButton.classList.add('active');// add class for new
goToSlide(n);
};
})(i);
}
#slider {
min-height: 400px;
position: relative;
#slides {
min-height: 400px;
padding: 0;
margin: 0;
list-style-type: none;
.slide {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
opacity: 0;
z-index: 1;
min-height: 400px;
box-sizing: border-box;
background: $black;
color: $white;
display: flex;
align-items: center;
-webkit-justify-content: flex-end;
justify-content: flex-end;
-webkit-transition: opacity 1s;
-moz-transition: opacity 1s;
transition: opacity 1s;
&.showing {
opacity: 1;
z-index: 2;
}
&:nth-of-type(1) {
@include backImage('../images/evbox1.jpg');
}
&:nth-of-type(2){
@include backImage('../images/evbox2.jpg');
}
&:nth-of-type(3) {
@include backImage('../images/evbox3.jpg');
}
}
.slide-description {
width: 500px;
.slide-title {
width: 90%;
font-family: 'Open Sans', sans-serif;
font-size: 44px;
text-shadow: 0 2px 3px rgba($black, .2);
line-height: 1.1em;
margin-bottom: 10px;
}
p {
margin-bottom: 15px;
width: 90%;
font-size: 20px;
font-family: 'Open Sans', sans-serif;
font-weight: 300;
text-shadow: 0 2px 3px rgba($black, .2);
}
.btn {
@include button($blue, $font-color, $shadow-color);
}
}
@include respond-to($mobile) {
@media only screen and (max-width: $mobile) {
.slide:nth-of-type(3) {
background-position: left 0;
}
.slide-description {
height: 100%;
width: 100%;
padding: 8em 5em;
position: static;
text-align: center;
.slide-title {
font-size: 30px;
width: 100%;
}
.btn {
padding: 8px 16px;
}
}
p {
display: none;
}
}
}
}
}
/*Previous and Next Controls*/
.controls {
position: absolute;
top: 42%;
z-index: 10;
background: url('http://www.ev-box.com/Evbox-EN/includes/themes/evbox/assets/images/sprites@2x.png') no-repeat;
height: 50px;
width: 30px;
background-size: 369px 240px;
outline: 0;
border: 0;
cursor: pointer;
}
#previous {
right: 10px;
background-position: -50px -121px;
}
#next {
left: 10px;
background-position: -16px -121px;
}
// Pagination
#pagination {
position: absolute;
bottom: 30px;
right: 50%;
z-index: 10;
button {
border-radius: 50%;
border: 1px solid $white;
background-color: $white;
opacity: .8;
width: 14px;
height: 14px;
min-height: 14px;
border-width: 0;
margin-right: 5px;
&.active {
width: 15px;
height: 15px;
min-height: 15px;
border: 1px solid $white;
background-color: $primary;
opacity: 1;
&:focus {
outline: 0;
}
}
}
}
我更新了JavaScript，如下所示。在您的代码笔中使用它。您可以看到差异。如果单击下一步和上一个按钮，则使用此JavaScript
可以突出显示相应的分页document.addEventListener("DOMContentLoaded", function() {
var slides = document.querySelectorAll('#slides .slide'); // get all the slides
const totalSlides = 2 // Total number of slides count
var currentSlide = 0; // current slide
var previousSlide = totalSlides;
// var slideInterval = setInterval(nextSlide, 1000);
function nextSlide() {
previousSlide = currentSlide
if(totalSlides > currentSlide){
currentSlide += 1
}
else currentSlide = 0
goToSlide();
}
function PreviousSlide() {
if(currentSlide == 0){
previousSlide = currentSlide
currentSlide = totalSlides
}
else{
previousSlide = currentSlide
currentSlide -=1
}
goToSlide();
}
function goToSlide() {
slides[previousSlide].className = 'slide';
slides[currentSlide].className = 'slide showing';
var currentSlideButton = "button"+currentSlide
var previousSlideButton = "button"+previousSlide
document.getElementById(currentSlideButton).classList.add('active');
document.getElementById(previousSlideButton).classList.remove('active');
}
//Previous and Next controls
var next = document.getElementById('next');
var previous = document.getElementById('previous');
next.onclick = function() {
PreviousSlide();
};
previous.onclick = function() {
nextSlide();
};
//Pagination controls
var p = document.getElementById('pagination');
var phtml = '';
for(var i = 0; i < slides.length; i++) {
phtml += '<button id=button'+i+'></button>'; // create the pagination buttons for each slide
}
p.innerHTML = phtml; //insert the html for the buttons
var pbuttons = p.querySelectorAll('button'); // grab all the buttons
var activeButton = null; // reference to active button
for(var i = 0; i < pbuttons.length; i++) {
pbuttons[i].onclick = (function(n) {
return function() {
if(activeButton)
activeButton.classList.remove('active'); // delete class from old active button
activeButton = this;// change ref, this is current button
activeButton.classList.add('active');// add class for new
goToSlide(n);
};
})(i);
}
goToSlide();// Initialising goToSlide method
});