所有项目提交
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160
驭鑫/yxsilicon/js/solution.js
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160
驭鑫/yxsilicon/js/solution.js
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document.addEventListener('DOMContentLoaded', () => {
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// 获取所需的DOM元素
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const container = document.querySelector('.carousel-container');
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const list = document.querySelector('.carousel-list');
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const items = document.querySelectorAll('.carousel-item');
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const prevBtn = document.querySelector('.carousel-arrow-left');
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const nextBtn = document.querySelector('.carousel-arrow-right');
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const indicators = document.querySelectorAll('.indicator');
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// 如果元素不存在,直接返回
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if (!container || !list || !items.length) {
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console.error('轮播图元素不存在,初始化失败');
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return;
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}
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// 克隆第一个和最后一个项目
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const firstClone = items[0].cloneNode(true);
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const lastClone = items[items.length - 1].cloneNode(true);
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// 将克隆的元素添加到列表中
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list.appendChild(firstClone);
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list.insertBefore(lastClone, list.firstChild);
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// 设置初始位置,因为添加了一个项目在前面,所以从1开始
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let currentIndex = 1;
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let interval = null;
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let isTransitioning = false;
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// 初始化位置
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updatePosition(false);
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// 更新位置的函数
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function updatePosition(withTransition = true) {
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// 如果需要过渡动画
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if (withTransition) {
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list.style.transition = 'transform 0.5s ease';
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} else {
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list.style.transition = 'none';
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}
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// 计算位置并应用变换
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const position = -currentIndex * 100;
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list.style.transform = `translateX(${position}%)`;
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// 更新指示器状态,注意要减去1因为我们添加了克隆项目
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updateIndicators();
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}
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// 更新指示器状态
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function updateIndicators() {
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// 考虑循环,将currentIndex转换回真实索引
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const realIndex = currentIndex - 1;
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// 使用模运算确保索引在有效范围内
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const activeIndex = (realIndex + items.length) % items.length;
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indicators.forEach((indicator, i) => {
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indicator.classList.toggle('active', i === activeIndex);
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});
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}
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// 自动播放函数
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function startAutoPlay() {
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if (interval) clearInterval(interval);
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interval = setInterval(nextSlide, 3000);
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}
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// 暂停自动播放
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function stopAutoPlay() {
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clearInterval(interval);
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}
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// 下一张函数
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function nextSlide() {
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if (isTransitioning) return;
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isTransitioning = true;
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currentIndex++;
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updatePosition();
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}
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// 上一张函数
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function prevSlide() {
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if (isTransitioning) return;
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isTransitioning = true;
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currentIndex--;
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updatePosition();
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}
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// 处理过渡结束事件
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list.addEventListener('transitionend', () => {
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isTransitioning = false;
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// 如果到达了最后一个克隆项
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if (currentIndex >= items.length + 1) {
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currentIndex = 1;
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updatePosition(false);
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}
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// 如果到达了第一个克隆项
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if (currentIndex <= 0) {
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currentIndex = items.length;
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updatePosition(false);
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}
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});
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// // 绑定按钮事件
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// prevBtn.addEventListener('click', () => {
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// prevSlide();
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// stopAutoPlay();
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// startAutoPlay();
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// });
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// nextBtn.addEventListener('click', () => {
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// nextSlide();
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// stopAutoPlay();
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// startAutoPlay();
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// });
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// 绑定指示器点击事件
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indicators.forEach((indicator, index) => {
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indicator.addEventListener('click', () => {
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currentIndex = index + 1; // +1因为我们添加了克隆项目
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updatePosition();
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stopAutoPlay();
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startAutoPlay();
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});
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});
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// 鼠标悬停暂停
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container.addEventListener('mouseenter', stopAutoPlay);
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container.addEventListener('mouseleave', startAutoPlay);
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// 添加触摸滑动支持
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let touchStartX = 0;
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let touchEndX = 0;
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container.addEventListener('touchstart', (e) => {
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touchStartX = e.touches[0].clientX;
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stopAutoPlay();
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});
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container.addEventListener('touchend', (e) => {
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touchEndX = e.changedTouches[0].clientX;
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const difference = touchStartX - touchEndX;
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if (Math.abs(difference) > 50) {
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if (difference > 0) {
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nextSlide();
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} else {
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prevSlide();
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}
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}
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startAutoPlay();
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});
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// 开始自动播放
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startAutoPlay();
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});
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