JavaScript实现简易轮播图最全代码解析(ES6面向对象)
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2022-03-16 20:51:59
本文实例为大家分享了javascript实现简易轮播图的具体代码，供大家参考，具体内容如下完整代码： &...
本文实例为大家分享了javascript实现简易轮播图的具体代码，供大家参考，具体内容如下
完整代码：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>es6轮播图</title>
<script></script>
<style>
* {
margin: 0;
padding: 0;
}
.box {
width: 500px;
height: 300px;
border: 1px solid silver;
overflow: hidden;
margin: auto;
margin-top: 50px;
position: relative;
top: 0;
left: 0;
}
.outer {
list-style: none;
position: absolute;
top: 0;
left: 0;
transition: .3s all linear;
}
.img {
width: 500px;
height: 300px;
float: left;
}
.btns span {
position: absolute;
width: 25px;
height: 40px;
top: 50%;
margin-top: -20px;
line-height: 40px;
text-align: center;
font-weight: bold;
font-family: simsun;
font-size: 30px;
border: 1px solid silver;
opacity: 0.5;
cursor: pointer;
color: #fff;
background: black;
}
.btns .left {
left: 5px;
}
.btns .right {
left: 100%;
margin-left: -32px;
}
.right > :first-child, .left > :first-child {
width: 35px;
height: 35px;
}
.ool {
width: 163px;
position: absolute;
right: 0;
left: 0;
margin: auto;
bottom: 10px;
list-style: none;
}
.oli {
width: 25px;
height: 25px;
background: white;
border-radius: 50%;
float: left;
}
.color {
background: black;
}
</style>
</head>
<body>
<div class="box">
<ul class="outer">
<li class="img" style="background-image:url(img/0.jpeg)"></li>
<li class="img" style="background-image:url(img/1.jpeg)"></li>
<li class="img" style="background-image:url(img/2.jpeg)"></li>
<li class="img" style="background-image:url(img/3.jpeg)"></li>
<li class="img" style="background-image:url(img/4.jpeg)"></li>
</ul>
<div class="btns">
<span class="left"><</span>
<span class="right">></span>
</div>
</div>
</body>
<script>
class chart{
constructor(name, json) {
//获取盒子名
this.box = document.queryselector(name);
this.json = json;
//获取轮播图的属性
this.outer = document.queryselector(name + ' .outer'); //注意加空格
this.left = document.queryselector(name + ' .left');
this.right = document.queryselector(name + ' .right');
//初始化
this.timer = null; //自动播放
this.inow = 0;
this.init();
}
init() {
const that = this; //保存一个this
console.log(this.json.a);
if (this.json.a){
console.log(1);
}
//克隆第一张放到最后
let uli = that.outer.children[0].clonenode(true);
that.outer.appendchild(uli);
that.outer.style.width = that.outer.children.length * that.outer.children[0].offsetwidth + 'px';
//点击左右滑动
if (that.json.slide) {
that.left.style.display = 'block';
that.right.style.display = 'block';
this.left.onclick = () => that.rightgo();
this.right.onclick = () => that.leftgo();
}
//自动播放
if (that.json.move) {
that.movego();
//鼠标移入移出
if (that.json.loop) {
that.box.onmousemove = () => clearinterval(that.timer);
that.box.onmouseout = () => that.movego();
}
}
//展示小圆点
if (that.json.nav) {
let ool = document.createelement('ol');
ool.classname = 'ool';
ool.style.left = that.json.distanceleft + 'px';
that.box.appendchild(ool);
for (let i = 0; i < that.outer.children.length - 1; i++) {
let oli = document.createelement('li');
oli.classname = 'oli';
oli.style.marginleft = that.json.distance + 'px';
ool.appendchild(oli);
}
ool.style.width = ((that.outer.children.length - 1) * document.queryselector('.oli').offsetwidth) + (that.json.distance * that.outer.children.length) + 'px';
that.alike();
}
};
rightgo() {
this.inow++;
if (this.inow >= this.outer.children.length) {
this.inow = 1;
this.outer.style.transition = '0s all linear';
this.outer.style.left = 0;
}
this.outer.style.left = -this.inow * this.outer.children[0].offsetwidth + 'px';
this.outer.style.transition = '0.3s all linear';
this.alike();
};
leftgo() {
this.inow--;
if (this.inow <= -1) {
this.inow = this.outer.children.length - 1;
this.outer.style.transition = '0s all linear';
this.outer.style.left = -(this.outer.children.length - 1) * this.outer.children[0].offsetwidth + 'px';
this.inow = this.outer.children.length - 2;
}
this.outer.style.left = -this.inow * this.outer.children[0].offsetwidth + 'px';
this.outer.style.transition = '0.3s all linear';
this.alike();
};
movego() {
const that = this;
this.timer = setinterval(() => that.rightgo(), that.json.speed || 1500)
};
//圆点对应每张图片
alike() {
let li = document.queryselectorall('.oli');
for (let i = 0; i < li.length; i++) {
li[i].classlist.remove('color');
if (i == this.inow) {
li[i].classlist.add('color');
} else {
li[i].classlist.remove('color');
}
//特殊：最后一张的时候是第一个
if (this.inow == li.length) {
li[0].classlist.add('color');
}
//小圆点点击事件
if (this.json.event) {
li[i].onmouseover = () => {
for (let i = 0; i < li.length; i++) {
li[i].classlist.remove('color');
}
li[i].classlist.add('color');
this.outer.style.left = -i * this.outer.children[0].offsetwidth + 'px';
}
}
}
}
}
new chart('.box', {
move: true, //自动轮播
speed: 1500, //轮播速度
loop: true, //鼠标移入移出效果
slide: true, //点击左右滑动效果
nav: true, //展示小圆点
distance: 20, //小圆点间距
event: true //小圆点事件
})
</script>
</html>
图片：
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