var play = play||{};

Sorry, as an AI language model, I'm not sure what do you mean by this code. Can you please provide more context or code snippet so that I can assist you better?

相关问题

帮我把这堆代码简便化var carousel = document.querySelector('.carousel');var ul = carousel.querySelector('.carousel-list');var li = carousel.querySelectorAll('.carousel-item');var len = li.length;var prev = carousel.querySelector('.carousel-prev');var next = carousel.querySelector('.carousel-next');var dots = carousel.querySelectorAll('.carousel-dot');var currentIndex = 0;var timer = null;function play() { timer = setInterval(function() { currentIndex++; if(currentIndex >= len) { currentIndex = 0; } changeTo(currentIndex); }, 2000);}function changeTo(index) { ul.style.left = -index * 500 + 'px'; for(var i = 0; i < len; i++) { dots[i].className = 'carousel-dot'; } dots[index].className = 'carousel-dot active'; currentIndex = index;}play();prev.onclick = function() { currentIndex--; if(currentIndex < 0) { currentIndex = len - 1; } changeTo(currentIndex);}next.onclick = function() { currentIndex++; if(currentIndex >= len) { currentIndex = 0; } changeTo(currentIndex);}for(var i = 0; i < len; i++) { dots[i].index = i; dots[i].onclick = function() { changeTo(this.index); }}carousel.onmouseover = function() { clearInterval(timer);}carousel.onmouseout = function() { play();}

以下是简化后的代码：

const carousel = document.querySelector('.carousel');
const ul = carousel.querySelector('.carousel-list');
const li = carousel.querySelectorAll('.carousel-item');
const len = li.length;
const prev = carousel.querySelector('.carousel-prev');
const next = carousel.querySelector('.carousel-next');
const dots = carousel.querySelectorAll('.carousel-dot');
let currentIndex = 0;
let timer = null;

function play() {
timer = setInterval(() => {
currentIndex++;
if (currentIndex >= len) {
currentIndex = 0;
}
changeTo(currentIndex);
}, 2000);
}

function changeTo(index) {
ul.style.left = -index * 500 + 'px';
dots.forEach(dot => dot.classList.remove('active'));
dots[index].classList.add('active');
currentIndex = index;
}

play();

prev.onclick = () => {
currentIndex--;
if (currentIndex < 0) {
currentIndex = len - 1;
}
changeTo(currentIndex);
};

next.onclick = () => {
currentIndex++;
if (currentIndex >= len) {
currentIndex = 0;
}
changeTo(currentIndex);
};

dots.forEach((dot, index) => {
dot.index = index;
dot.onclick = function() {
changeTo(this.index);
}
});

carousel.onmouseover = () => clearInterval(timer);
carousel.onmouseout = () => play();

var pauseEle = document.getElementById("pause"); var stopEle = document.getElementById("stop"); var minusEle = document.getElementById("minus"); var addEle = document.getElementById("add"); var quietEle = document.getElementById("quiet"); var audioImg = document.getElementById("audio-img"); pauseEle.onclick = function() { if (pauseEle.innerText === '暂停') { test.pauseAudio(); pauseEle.innerText = '继续'; audioImg.src = 'pause.png'; } else { test.playAudio(); pauseEle.innerText = '暂停'; audioImg.src = 'play.png'; } } stopEle.onclick = function() { if (stopEle.innerText === '停止') { test.stopAudio(); stopEle.innerText = '开始'; audioImg.src = 'stop.png'; } else { test.startAudio(); stopEle.innerText = '停止'; audioImg.src = 'play.png'; } }增加了播放暂停切换图片在html里面怎么写 实例

在 HTML 中添加一个 `<img>` 标签，设置 id 属性为 "audio-img"，并设置初始的图片路径。例如：

<img id="audio-img" src="play.png" alt="播放">

然后在 JavaScript 中获取该元素并修改它的 src 属性即可。例如：

var audioImg = document.getElementById("audio-img");
// 在暂停按钮点击事件中
audioImg.src = 'pause.png';
// 在继续按钮点击事件中
audioImg.src = 'play.png';
// 在停止按钮点击事件中
audioImg.src = 'stop.png';

注意，图片文件需要与 HTML 文件在同一目录下。