一款JavaScript+CSS制作的简单的幻灯片,通过点击下面的左右箭头符号按钮来切换不同的图片,所有图片都可以自由替换的,幻灯片的样式也可以自由调整。
页面的head部分,需设置好页面元素的样式,代码如下:
body {
font-family: 'Microsoft YaHei','Lantinghei SC','Open Sans',Arial,'Hiragino Sans GB','STHeiti','WenQuanYi Micro Hei','SimSun',sans-serif;
}
h1 {
text-align: center;
margin-top: 38px;
}
.dowebok {
width: 700px;
margin: 0 auto;
}
.slider-nav ul {
list-style: none;
margin: 0;
padding: 0;
display: -webkit-box;
display: flex;
-webkit-box-pack: center;
justify-content: center;
}
.slider-nav li {
-webkit-box-flex: 2;
flex: 2;
text-align: center;
display: -webkit-box;
display: flex;
}
img {
max-width: 100%;
display: none;
-webkit-box-shadow: 10px 10px 20px 0 rgba(94,47,59,0.2);
-moz-box-shadow: 10px 10px 20px 0 rgba(94,47,59,0.2);
box-shadow: 10px 10px 20px 0 rgba(94,47,59,0.2);
}
img.active {
display: block;
-webkit-animation: fadeImg 0.8s;
-moz-animation: fadeImg 0.8s;
animation: fadeImg 0.8s;
}
.slider-nav {
margin-top: 20px;
}
.slider-nav .arrow {
flex: 0 0 15%;
}
.slider-nav a {
flex-basis: 100%;
display: -webkit-box;
display: flex;
-webkit-box-align: center;
align-items: center;
-webkit-justify-content: center;
justify-content: center;
}
.slider-nav span {
padding: 5px 10px;
font-size: 30px;
cursor: pointer;
}
@-webkit-keyframes fadeImg {
from {
opacity: 0;
}
to {
opacity: 1;
}
}
@-moz-keyframes fadeImg {
from {
opacity: 0;
}
to {
opacity: 1;
}
}
@keyframes fadeImg {
from {
opacity: 0;
}
to {
opacity: 1;
}
}
页面的body部分,一个div容器放图片,一个nav标签里放切换的按钮,代码如下:
<h1>JavaScript+CSS制作简单的幻灯片</h1>
<div class="dowebok">
<img class="active" src="images/1.jpg">
<img src="images/2.jpg">
<img src="images/3.jpg">
</div>
<nav class="slider-nav">
<ul>
<li class="arrow">
<a class="previous">
<span><</span>
</a>
</li>
<li class="arrow">
<a class="next">
<span>></span>
</a>
</li>
</ul>
</nav>
页面的底部,需设置好切换按的点击事件响应,代码如下:
var items = document.querySelectorAll('img');
var itemCount = items.length;
var nextItem = document.querySelector('.next');
var previousItem = document.querySelector('.previous');
var count = 0;
function showNextItem() {
items[count].classList.remove('active');
if (count < itemCount - 1) {
count++;
} else {
count = 0;
}
items[count].classList.add('active');
console.log(count);
}
function showPreviousItem() {
items[count].classList.remove('active');
if (count > 0) {
count--;
} else {
count = itemCount - 1;
}
items[count].classList.add('active');
console.log(count);
}
nextItem.addEventListener('click', showNextItem);
previousItem.addEventListener('click', showPreviousItem);
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