不知道的小程序玩法_完成图片首尾滑润轮播(JS原

实现图片首尾平滑轮播(JS原生方法—节流)       下面小编就为大家带来一篇实现图片首尾平滑轮播(JS原生方法—节流)。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧

首先给出HTML代码,要注意轮播图片表(#list)末尾加上第一个图片1.jpg,在首部加上最后一个图片5.jpg。

 !DOCTYPE html 
 html lang="en" 
 head 
 meta charset="UTF-8" 
 title 首尾轮播 /title 
 link rel="stylesheet" href="首尾轮播.css" rel="external nofollow" 
 script src="首尾轮播.js" /script 
 /head 
 body 
 div id="container" 
 div id="list" 
 div a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img src="../imgs/5.jpg" alt="" /a /div 
 div a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img src="../imgs/1.jpg" alt="" /a /div 
 div a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img src="../imgs/2.jpg" alt="" /a /div 
 div a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img src="../imgs/3.jpg" alt="" /a /div 
 div a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img src="../imgs/4.jpg" alt="" /a /div 
 div a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img src="../imgs/5.jpg" alt="" /a /div 
 div a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img src="../imgs/1.jpg" alt="" /a /div 
 /div 
 div id="prev" /div 
 div id="next" /div 

接下来给出css和js代码,大家可以酌情根据图片的大小、数量、宽度,调整container、list的参数,这也是封装JS所要考虑的参数。

 margin: 0;
 padding: 0;
#container{
 height: 400px;
 width: 500px;
 margin: 0 auto;
 position: relative;
 overflow: hidden;
 border: 1px solid black;
#list div {
 float: left;
#list{
 position: absolute; 
 height: 400px;
 width: 3600px;
#list img{
 height: 400px;
 width: 500px;
.arrow {
 user-select:none;
 position: absolute;
 top:150px;
 z-index: 2;
 background-color: #aaa;
 height: 100px;
 width: 80px;
 cursor: pointer;
 opacity: 0.5;
 display: none;
 line-height: 100px;
 text-align: center;
 color: #222;
 font-size: 3em;
#container:hover .arrow{
 display: block;
 #prev{
 left:20px;
 #next{
 right: 20px;
}

在JS中,我们可以通过改变speed变量来控制图片切换的速度....这里用的是 element.style.transition来控制的过渡效果.

window.onload=function(){
 var container = document.getElementById('container');
 var list = document.getElementById('list');//获取图片容器
 var prev = document.getElementById('prev');//向前按钮
 var next = document.getElementById('next');//向后按钮
 var nowP = 1; //显示位置
 var judge = null; //执行权
 var speed = 0.1; // 切换速度 秒
 prev. unction(){
 if(!judge){
 judge = setTimeout(function(){
 if(nowP==1){setTimeout(function(){
 list.style.transition="left 0s";
 list.style.left = "-2500px"; 
 nowP = 5;},speed*1000);} //当到达图片表左边缘时与动画同步切换 
 list.style.transition = "left "+speed+"s";
 move(500);
 nowP--;
 judge = null;
 },speed*1000);
 next. unction(){
 if(!judge){ 
 judge = setTimeout(function(){
 if(nowP==5){setTimeout(function(){
 list.style.transition="left 0s";
 list.style.left = "-500px"; 
 nowP = 1;},speed*1000);} //当到达图片表右边缘时与动画同步切换 
 list.style.transition = "left "+speed+"s";
 move(-500);
 nowP++;
 judge = null;
 },speed*1000);
 function move(num){
 var term = parseInt(list.style.left) + num ; 
 list.style.left = term+"px";
 var roll= setInterval(function(){
 next.onclick();
 },2000);
 container.onmouseenter=function(){
 clearInterval(roll);
 container.onmouseleave=function()
 roll=setInterval(function(){
 next.onclick();
 },2000);

下面是一个演示demo,简单来说原理就是在切换到图片表首和表尾的动画开始时,设置一个延迟执行时间与动画过渡时间相同的setTimeout函数来执行瞬间切换,再通过节流来保证最大的切换速度(speed)。

本人也是初学前端,如果有帮助的话,点一下推荐吧

以上这篇实现图片首尾平滑轮播(JS原生方法—节流)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持凡科。