原生javascript實現圖片輪播切換效果
本文實例為大傢分享瞭javascript實現圖片輪播切換效果的具體代碼，供大傢參考，具體內容如下
效果如下：
代碼部分：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
*{margin:0;padding:0;}
#banner{position:relative;width:400px;height:200px;margin:50px auto;overflow: hidden;}
#banner .box{width:400px;height:200px;overflow: hidden;}
#banner .box li img{width:400px;height:200px;overflow: hidden;}
#banner .box li{display:none;}
#banner .box li.active{display:block;}
#banner .static{position:absolute;bottom:0;height:30px;width:390px;padding-right:10px;text-align:right;}
#banner .static span{display:inline-block;width:20px;height:20px;margin:0 2px;line-height:20px;text-align:center;background:#fff;cursor:default;}
#banner .static span.active{background:blue;color:#fff;}
#banner .btn{position:absolute;top:80px;height:40px;width:20px;color:#fff;line-height:40px;text-align:center;background:#000;opacity:.75;cursor:default;}
#banner .next.btn{right:0;}
</style>
</head>
<body>
<div id="banner">
<div class="box">
<ul>
<li class="active">
<a href="#">
<img src="img/banner.jpg"/>
</a>
</li>
<li>
<a href="#">
<img src="img/banner01.jpg"/>
</a>
</li>
<li class="">
<a href="#">
<img src="img/banner02.jpg"/>
</a>
</li>
<li>
<a href="#">
<img src="img/banner03.jpg"/>
</a>
</li>
</ul>
</div>
<div class="static">
<span class="active">1</span>
<span>2</span>
<span>3</span>
<span>4</span>
</div>
<div class="prev btn"><</div>
<div class="next btn">></div>
</div>
<script>
//切換樣式
function toggleClass(elem, classStr){
if(elem.className){
if(elem.className.indexOf(classStr) > -1){
elem.className = elem.className.replace(classStr,"");
}else{
elem.className = elem.className + " " + classStr;
}
}else{
elem.className = classStr;
}
}
//獲取元素所在兄弟元素的索引
function getIndex(elem){
var index;
var childNodes = elem.parentNode.childNodes;
//獲取子元素的元素節點
function childElem(){
var result = [];
for(var i = 0, len = childNodes.length; i < len; i++){
if(childNodes[i].nodeType == 1){
result.push(childNodes[i]);
}
}
return result;
}
//判斷元素與子元素是否相等
var child = childElem(elem);
for(var j = 0, lenj = child.length; j < len; j++){
if(child[j] == elem){
index = j;
}else{
console.error("沒有找到相應的子元素！");
}
}
//返回索引
return index;
}
//dom選擇器
function $(selector){
return document.querySelector(selector);
}
function $$(selector){
return document.querySelectorAll(selector);
}
//對象參數
var int = {
num: null,
speed: null,
timerId: null
};
var liItem = $$("#banner .box li");
var static = $$("#banner .static span");
var btn = $$("#banner .btn");
//初始化默認值
var activeNum = 1;
int.num = liItem.length;
int.speed = 3000;
//切換動作
function toggleItem(num){
toggleClass($("#banner .box li.active"), "active");
toggleClass($("#banner .static span.active"), "active");
//添加下一個激活選項
toggleClass(liItem.item(num), "active");
toggleClass(static.item(num), "active");
}
function autoPlay(){
int.timerId = setInterval(function(){
if(activeNum < int.num){
toggleItem(activeNum);
activeNum++;
}else{
activeNum = 0;
toggleItem(activeNum);
activeNum++;
}
},int.speed);
}
//定時輪播
autoPlay();
//狀態點鼠標移入移出效果
for(var i = 0, len = static.length; i < len; i++){
//匿名傳參避免產生閉包得不到想要的效果
(function(j){
//鼠標移入效果
static.item(j).onmouseenter = function(){
//停止動畫
clearInterval(int.timerId);
var index = getIndex(this);
toggleItem(index);
}
//鼠標移出效果
static.item(j).onmouseleave = function(){
//開始動畫
autoPlay();
}
})(i);
}
for(var k = 0, lenk = btn.length; k < lenk; k++){
//上下張按鈕移入移出效果
btn.item(k).onmouseenter = function(){
clearInterval(int.timerId);
}
btn.item(k).onmouseleave = function(){
autoPlay();
}
}
//單價擊上一張
$(".prev.btn").onclick = function(){
if(activeNum > 0){
activeNum--;
toggleItem(activeNum);
}else{
activeNum = 3;
toggleItem(activeNum);
}
}
//單擊下一張
$(".next.btn").onclick = function(){
if(activeNum < int.num){
toggleItem(activeNum);
activeNum++;
}else{
activeNum = 0;
toggleItem(activeNum);
activeNum++;
}
}
</script>
</body>
</html>
以上就是本文的全部內容，希望對大傢的學習有所幫助，也希望大傢多多支持WalkonNet。