没有 JavaScript 计时器的自动播放轮播 - CSS 动画
短信预约 -IT技能 免费直播动态提醒
先看效果：
再看代码（查看更多）：
DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>计时器title> <style> * { padding: 0; margin: 0; box-sizing: border-box; } body { background: #98ede0; transition: background 500ms; font-family: ui-rounded, "Hiragino Maru Gothic ProN", Quicksand, Comfortaa, Manjari, "Arial Rounded MT", "Arial Rounded MT Bold", Calibri, source-sans-pro, sans-serif; } .content { margin: 0 auto; max-width: 500px; height: 100vh; height: 100svh; min-height: 400px; display: flex; flex-direction: column; padding: 40px 40px 80px; justify-content: center; } a { transition: color 200ms; color: rgba(0, 0, 0, 0.5); border-radius: 5px; text-decoration: none; margin: 40px auto 0; } a:hover { color: black; text-decoration: underline; } a:focus-visible { color: black; outline: 3px solid rgba(255, 255, 255, 0.3); outline-offset: 5px; } .pagination { display: flex; gap: 10px; height: 4px; min-height: 4px; } .pagination-item { border-radius: 100px; height: 100%; flex: auto; background: rgba(0, 0, 0, 0.08); overflow: hidden; border: 0; cursor: pointer; } @keyframes progress { from { width: 0; } to { width: 100%; } } .pagination-progress { flex: auto; background: #333; height: 100%; width: 0; } .pagination-item--running .pagination-progress { animation: progress 3s linear forwards; } .pagination-item--done .pagination-progress { width: 100%; } .pagination--paused .pagination-progress { animation-play-state: paused; } :-moz-window-inactive .pagination-progress { animation-play-state: paused; } .controls { display: flex; justify-content: center; gap: 12px; } .control { display: flex; align-items: center; justify-content: center; border-radius: 100px; border: none; outline: none; height: 40px; flex: 40px 0 0; max-width: 100px; background: rgba(255, 255, 255, 0.3); transition: transform 200ms, background-color 200ms; will-change: transform, background-color; font-size: 20px; } .control:hover { cursor: pointer; transform: scale(1.15); background: rgba(255, 255, 255, 0.45); } .control:focus { background: rgba(255, 255, 255, 0.6); } .icon { width: 20px; } .icon--play { margin-right: -2px; } .pagination--paused ~ .controls .icon--pause, .pagination:not(.pagination--paused) ~ .controls .icon--play { display: none; } .state { font-size: 120px; text-align: center; } style>head><body><div class="content"> <div class="pagination"> div> <div class="state"> div> <div class="controls"> <button class="control control--prev" aria-label="Previous"> <svg class="icon" viewBox="0 0 32 32"> <path d="M20 28a1 1 0 0 1-.521-.146l-18-11a1.002 1.002 0 0 1 0-1.708l18-11A.999.999 0 0 1 21 5v6.11a1 1 0 0 1-.479.854L13.918 16l6.603 4.035c.297.182.479.506.479.854V27a1 1 0 0 1-1 1zM3.918 16 19 25.217V21.45l-7.521-4.596a1 1 0 0 1 0-1.707L19 10.55V6.783L3.918 16z" /> <path d="M30 28a1 1 0 0 1-.521-.146l-18-11a1.002 1.002 0 0 1 0-1.708l18-11A.999.999 0 0 1 31 5v22a1 1 0 0 1-1 1zM13.918 16 29 25.217V6.783L13.918 16z" /> svg> button> <button class="control control--play-pause" aria-label="Play/Pause"> <svg class="icon icon--play" viewBox="0 0 32 32"> <path d="M7 28a.999.999 0 0 1-1-1V5a1 1 0 0 1 1.521-.854l18 11a1.001 1.001 0 0 1 0 1.708l-18 11A1 1 0 0 1 7 28zM8 6.783v18.434L23.082 16 8 6.783z" /> svg> <svg class="icon icon--pause" viewBox="0 0 32 32"> <path d="M13 28H7a1 1 0 0 1-1-1V5a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1v22a1 1 0 0 1-1 1zm-5-2h4V6H8v20zM25 28h-6a1 1 0 0 1-1-1V5a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1v22a1 1 0 0 1-1 1zm-5-2h4V6h-4v20z" /> svg> button> <button class="control control--next" aria-label="Next"> <svg class="icon" viewBox="0 0 32 32"> <path d="M12 28a1 1 0 0 1-1-1v-6.111c0-.348.182-.672.479-.854L18.082 16l-6.603-4.035A1.001 1.001 0 0 1 11 11.11V5a1 1 0 0 1 1.521-.854l18 11a1.002 1.002 0 0 1 0 1.708l-18 11A1 1 0 0 1 12 28zm1-6.55v3.767L28.082 16 13 6.783v3.767l7.521 4.596a1.001 1.001 0 0 1 0 1.708L13 21.45z" /> <path d="M2 28a1 1 0 0 1-1-1V5a1 1 0 0 1 1.521-.854l18 11a1.002 1.002 0 0 1 0 1.708l-18 11A1 1 0 0 1 2 28zM3 6.783v18.434L18.082 16 3 6.783z" /> svg> button> div> <a target="_blank" href="https://blog.csdn.net/qq_35241329?type=blog">博客文章a>div>body><script> "use strict"; function getItem(index) { const item = document.createElement('button'); item.classList.add('pagination-item'); item.addEventListener('animationend', next); item.addEventListener('click', () => update(index)); const progress = document.createElement('div'); progress.classList.add('pagination-progress'); item.appendChild(progress); return item; } function createItems(itemsCount) { const items = []; for (let i = 0; i < itemsCount; i++) { items.push(getItem(i)); } return items; } function jumpTo(item) { if (isPaused) { item.classList.remove(classNames.RUNNING); item.classList.add(classNames.DONE); } else { item.classList.add(classNames.RUNNING); item.classList.remove(classNames.DONE); } let sibling = item; while ((sibling = sibling.previousSibling)) { sibling.classList.remove(classNames.RUNNING); sibling.classList.add(classNames.DONE); } sibling = item; while ((sibling = sibling.nextSibling)) { sibling.classList.remove(classNames.RUNNING, classNames.DONE); } } function update(index) { activeIndex = index; jumpTo(items[activeIndex]); // 更新幻灯片和背景颜色 $state.innerHTML = activeIndex + 1; document.body.style.backgroundColor = colors[activeIndex]; } function prev() { if (activeIndex > 0) { update(activeIndex - 1); } } function next() { if (activeIndex < ITEMS_COUNT - 1) { update(activeIndex + 1); } } function playPause() { $pagination.classList.toggle(classNames.PAUSED); isPaused = !isPaused; ///如果当前幻灯片已完成，跳到下一张 if (!isPaused && items[activeIndex].classList.contains(classNames.DONE)) { next(); } } const colors = ['#98ede0', '#74b9ff', '#a29bfe', '#fd79a8', '#ffeaa7']; const classNames = { RUNNING: 'pagination-item--running', DONE: 'pagination-item--done', PAUSED: 'pagination--paused', }; let activeIndex = 0; let isPaused = false; const ITEMS_COUNT = 5; const items = createItems(ITEMS_COUNT); const $pagination = document.querySelector('.pagination'); const $state = document.querySelector('.state'); const $prev = document.querySelector('.control--prev'); const $next = document.querySelector('.control--next'); const $playPause = document.querySelector('.control--play-pause'); $pagination.replaceChildren(...items); $prev.addEventListener('click', prev); $next.addEventListener('click', next); $playPause.addEventListener('click', playPause); update(activeIndex);script>html>来源地址：https://blog.csdn.net/qq_35241329/article/details/132569653
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