slide.js

原生js写的轮播兼容 pc+移动端 插件，支持轮播速度，轮播内容，轮播间隔，手势灵敏度自定义，导航圆点点击跳转,手势滑动。

使用说明：slide.js文件包含小部分es6语法编写的文件，在移动端有兼容性问题，仅供于源码参考。移动端跟pc端开发引用js文件直接下载slide-es5.js进行引入使用。

html代码

必须需要设置：包裹元素的id，以及高度跟宽度

包裹元素下面需要跟随一个div，div下面是带有class属性为slide-item的任意元素

js代码：

//需要先引入插件

slide = new Slide('slide',3000,1,20);

//第一个参数是设置了轮播的包裹元素的id，是必须参数

//第二个参数是轮播间隔，非必须参数，默认为3000ms

//第三个参数是轮播速度, 非必须参数，默认为1，数值越大轮播速度越快

//第四个参数是手指滑动灵敏度，非必须参数，默认为20，数值越大需要滑动触发的距离就越大

废话不多说，下面实现代码跟注释说明

(function () {

let Slide = function (

slideId = 'slide',

timeOut = 3000,

speed = 0.1,

d = 20

) {

this.d = d;//滑动灵敏度

this.timeOut = timeOut;//轮播间隔

this.slide = document.querySelector('#slide'); //获取视窗层

this.room = this.slide.querySelector('div'); //获取内容层

this.imgs = [...this.slide.querySelectorAll('.slide-item')]; //轮播图元素组

this.slideWidth = parseInt(getComputedStyle(this.slide).width); //视窗层高度

this.slideHeight = parseInt(getComputedStyle(this.slide).height); //视窗层宽度

this.startPoint = null; //手指触摸的起点

this.navButtons = null; //获取到所有的导航圆点

this.timer = null; //定时器

this.imgIndex = 1; //当前轮播图片index

this.prev = null; //上一个

this.next = null; //下一个

this.speed = -(this.slideWidth / 10 * speed); //动画速度

this.resetCss(); //初始化css样式

this.resetAll(); //初始化设置

this.imgs.forEach((el) => {

el.style.height = `${this.slideHeight}px`;

el.style.width = `${this.slideWidth}px`;

}); //使图片的宽度跟视窗层一样

this.autoStart = setInterval(() => {

this.nextItem()

}, timeOut);

//轮播间隔定时器

for (let i = 0; i < this.navButtons.length; i++) {

this.navButtons[i].onclick = this.navButtonClick.bind(this);

} //绑定导航圆点点击事件

//绑定触摸开始事件

this.slide.addEventListener('touchstart', this.touchstart.bind(this));

//绑定触摸结束事件

this.slide.addEventListener('touchend', this.touchend.bind(this));

}

//初始化样式

Slide.prototype.resetCss = function () {

let styleEle = document.createElement('style'); //创建style标签

let navLeft = this.slideWidth / 2 - this.imgs.length * 9;

let navTop = this.slideHeight / 40;

styleEle.innerHTML += '.slide{position:relative;overflow:hidden;font-size:0;}'; //舒适化slide视窗的样式

styleEle.innerHTML += '.slide .room{position:absolute;}'; //初始化room内容层的样式

styleEle.innerHTML += '.slide .slide-item{display:inline-block;}'; //设置slide-item的样式为内联块级元素

styleEle.innerHTML += `.slide .nav{padding:0 4px;list-style:none;position:absolute;font-size:0px;bottom:${navTop}px;left:${navLeft}px;text-align:center;}`;

styleEle.innerHTML += '.navButton{display:inline-block;margin:6px 4px;background:#fff;width:8px;height:8px;-moz-border-radius:8px;border-radius:8px;cursor:pointer;box-shadow:0 0 6px #bbb;}';

document.head.appendChild(styleEle); //插入标签

}

Slide.prototype.resetAll = function () {

this.slide.setAttribute('class', 'slide'); //给slide元素增加class属性

this.room.setAttribute('class', 'room'); //给room元素增加class属性

this.room.style.left = `0px`; //设置room的初始距离

this.room.style.width = `${this.slideWidth * (this.imgs.length)}px`; //设置内容层的宽度

//创建导航圆点定位框

let nav = document.createElement('ul');

nav.id = 'nav';

nav.setAttribute('class', 'nav');

this.slide.appendChild(nav);

for (let i = 0; i < this.imgs.length; i++) {

let navButtonLi = document.createElement('li');

navButtonLi.setAttribute('class', 'navButton');

navButtonLi.index = i + 1;

nav.appendChild(navButtonLi);

}

this.navButtons = this.slide.querySelectorAll('li'); //获取所有的li节点

this.navButtons[0].style.background = '#333'; //初始化第一个圆点的颜色

}

//切换下一个的函数

Slide.prototype.nextItem = function () {

//清除过度定时器

clearInterval(this.timer);

//清除间隔播放定时器

clearInterval(this.autoStart);

this.timer = setInterval(() => {

let left = parseInt(this.room.style.left);

if (this.imgIndex < this.imgs.length) {

if (left > (-this.slideWidth * this.imgIndex)) {

this.room.style.left = `${parseInt(this.room.style.left)+this.speed}px`;

} else {

clearInterval(this.timer);

this.room.style.left = `${-this.slideWidth*this.imgIndex}px`;

this.navButtons[this.imgIndex - 1].style.background = '#fff';

this.imgIndex++;

this.navButtons[this.imgIndex - 1].style.background = '#333';

}

} else {

if (left < 0) {

this.room.style.left = `${parseInt(this.room.style.left)+(-this.speed*2)}px`;

} else {

clearInterval(this.timer);

this.room.left = '0';

this.navButtons[this.imgIndex - 1].style.background = '#fff';

this.imgIndex = 1;

this.navButtons[this.imgIndex - 1].style.background = '#333';

}

}

}, 16.7);

this.autoStart = setInterval(() => {

this.nextItem()

}, this.timeOut);

}

Slide.prototype.lastItem = function () {

clearInterval(this.timer);

clearInterval(this.autoStart);

this.timer = setInterval(() => {

let left = parseInt(this.room.style.left);

if (this.imgIndex > 1) {

if (left < (-this.slideWidth * (this.imgIndex - 2))) {

this.room.style.left = `${parseInt(this.room.style.left)-this.speed}px`;

} else {

clearInterval(this.timer);

this.room.style.left = `${-this.slideWidth*(this.imgIndex-2)}px`;

this.navButtons[this.imgIndex - 1].style.background = '#fff';

this.imgIndex--;

this.navButtons[this.imgIndex - 1].style.background = '#333';

}

} else {

if (left > -this.slideWidth * (this.imgs.length - 1)) {

this.room.style.left = `${parseInt(this.room.style.left)+(this.speed*2)}px`;

} else {

clearInterval(this.timer);

this.room.left = `${-this.slideWidth*this.imgs.length-1}px`;

this.navButtons[this.imgIndex - 1].style.background = '#fff';

this.imgIndex = this.imgs.length;

this.navButtons[this.imgIndex - 1].style.background = '#333';

}

}

}, 16.7);

this.autoStart = setInterval(() => {

this.nextItem()

}, this.timeOut);

}

Slide.prototype.navButtonClick = function ({

target

}) {

clearInterval(this.autoStart);

clearInterval(this.timer);

this.timer = setInterval(() => {

let left = parseInt(this.room.style.left);

if (target.index > this.imgIndex) {

if (left > -this.slideWidth * (target.index - 1)) {

this.room.style.left = `${parseInt(this.room.style.left)+this.speed*(target.index-this.imgIndex)}px`;

} else {

clearInterval(this.timer);

this.room.style.left = `${-(this.slideWidth)*(target.index-1)}px`;

this.navButtonStyle(target);

}

} else if (target.index < this.imgIndex) {

if (left < -this.slideWidth * (target.index - 1)) {

this.room.style.left = `${parseInt(this.room.style.left) - this.speed * (this.imgIndex - target.index)}px`;

} else {

clearInterval(this.timer);

this.room.style.left = `${(-this.slideWidth) * (target.index - 1)}px`;

this.navButtonStyle(target);

}

} else {

return false;

}

}, 16.7);

this.autoStart = setInterval(() => {

this.nextItem()

}, this.timeOut);

}

//导航圆点点击事件

Slide.prototype.navButtonStyle = function (target) {

target.style.background = '#333';

this.navButtons[this.imgIndex - 1].style.background = '#fff';

this.imgIndex = target.index;

}

//手指触摸起始触发函数

Slide.prototype.touchstart = function (e = window.event) {

this.startPoint = e.touches[0];

}

//手指触摸结束触发函数

Slide.prototype.touchend = function (e = window.event) {

let endPoint = e.changedTouches[0];

let x = endPoint.clientX - this.startPoint.clientX;

let y = endPoint.clientY - this.startPoint.clientY;

if (Math.abs(x) > this.d) {

if (x < 0) {

this.nextItem();

} else {

this.lastItem();

}

}

}

this.Slide = Slide;

})();

使用说明以及源代码后续的优化，欢迎关注我的github 插件地址slide插件

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