html 实现鼠标滑动点亮横轴
实现一个有多个节点的横轴,鼠标向下滑动从左到右点亮横轴,鼠标向上滑动从右到左取消点亮效果。
代码:
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Timeline Scroll Effect</title><style>
.timeline {position: relative;height: 4px;background-color: #e0e0e0; /* 横轴“未点亮”的颜色 */margin: 40px 0;
}.timeline-progress {position: absolute;top: 0;left: 0;height: 100%;background-color: #00bcd4; /* 横轴“点亮”的颜色 */width: 0;transition: width 0.1s ease; /* 宽度变化的平滑过渡 */
}.timeline-dot {position: absolute;top: 50%;transform: translateY(-50%); /* 垂直居中 */width: 12px;height: 12px;border-radius: 50%; /* 圆形 */background-color: #e0e0e0; /* 节点“未点亮”颜色 */transition: background-color 0.2s ease; /* 节点颜色过渡 */
}</style>
</head>
<body>
<div class="timeline"><!-- 进度条:随滚动动态变化宽度 --><div class="timeline-progress"></div><!-- 横轴上的节点(圆点),通过left定位 --><div class="timeline-dot" style="left: 15%;"></div><div class="timeline-dot" style="left: 35%;"></div><div class="timeline-dot" style="left: 55%;"></div><div class="timeline-dot" style="left: 80%;"></div>
</div><script>const timelineProgress = document.querySelector('.timeline-progress');
const timelineDots = document.querySelectorAll('.timeline-dot');
let currentWidth = 0; // 当前点亮的宽度(百分比)
const maxWidth = 100; // 最大宽度(100%)window.addEventListener('wheel', (e) => {// deltaY > 0 → 鼠标下滑;deltaY < 0 → 鼠标上滑const isScrollDown = e.deltaY > 0;const step = isScrollDown ? 2 : -2; // 每次滚动的“增量/减量”// 限制宽度在 0 ~ 100 之间currentWidth = Math.max(0, Math.min(maxWidth, currentWidth + step));timelineProgress.style.width = `${currentWidth}%`;// 同步更新节点的点亮状态:进度超过节点位置时,节点点亮timelineDots.forEach(dot => {const dotPosition = parseFloat(dot.style.left); // 节点的位置(百分比)dot.style.backgroundColor = currentWidth >= dotPosition ? '#00bcd4' : '#e0e0e0';});
});</script>
</body>
</html>
页面效果如图: