带背景的轮播js

<div class="carousel - container">
    <div class="carousel - wrapper">
        <div class="carousel - item"><img src="image1.jpg" alt="Image 1"></div>
        <div class="carousel - item"><img src="image2.jpg" alt="Image 2"></div>
        <div class="carousel - item"><img src="image3.jpg" alt="Image 3"></div>
    </div>
    <button class="prev - button">Prev</button>
    <button class="next - button">Next</button>
</div>

.carousel - container {
    position: relative;
    width: 800px;
    height: 400px;
    overflow: hidden;
    background-color: #f0f0f0;
}

.carousel - wrapper {
    display: flex;
    transition: transform 0.5s ease - in - out;
}

.carousel - item {
    min - width: 100%;
}

.carousel - item img {
    width: 100%;
    height: auto;
}

.prev - button,
.next - button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    padding: 10px;
}

.prev - button {
    left: 10px;
}

.next - button {
    right: 10px;
}

let currentIndex = 0;
const carouselWrapper = document.querySelector('.carousel - wrapper');
const items = document.querySelectorAll('.carousel - item');
const totalItems = items.length;
const prevButton = document.querySelector('.prev - button');
const nextButton = document.querySelector('.next - button');
let autoSlideInterval;

function showItem(index) {
    const offset = -index * 100;
    carouselWrapper.style.transform = `translateX(${offset}%)`;
}

function nextItem() {
    currentIndex = (currentIndex + 1) % totalItems;
    showItem(currentIndex);
}

function prevItem() {
    currentIndex = (currentIndex - 1 + totalItems) % totalItems;
    showItem(currentIndex);
}

nextButton.addEventListener('click', () => {
    clearInterval(autoSlideInterval);
    nextItem();
    autoSlideInterval = setInterval(nextItem, 3000);
});

prevButton.addEventListener('click', () => {
    clearInterval(autoSlideInterval);
    prevItem();
    autoSlideInterval = setInterval(nextItem, 3000);
});

// 自动轮播
autoSlideInterval = setInterval(nextItem, 3000);