一个基于 Web Component 的虚拟滚动库
🌰：包含 1000 个随机高度项的虚拟列表
<head>
<script src="./dist/scrollv.umd.js"></script>
<script>Scrollv.define('scroll-v', Scrollv.AutoHeight)</script>
</head>
<body>
<button id="btn">滚动</button>
<!--
1. style 容器宽高由外部决定
2. total 代表渲染列表总条目数
3. itemHeight 预期的最小高度
4. pad?: 在屏幕外缓存的高度
5. passive?: 不需要执行 preventDefault 时开启可以优化滚动效果
6. rate?: 滚动倍率
-->
<scroll-v
id="scrollv"
style="height: 60vh; width: 300px;"
total="1000"
itemHeight="150"
pad="2"
/>
</body>
<script>
// mock 1000 random height data
const data = Array.from({ length: 1000 }, (_, i) => ({
height: 150 + Math.random() * 200,
i,
}));
// slice 事件触发时重新渲染可视区域
// vue react 等框架，也可以通过此事件渲染
scrollv.addEventListener('slice', (e) => {
const { start, end } = e.detail;
scrollv.innerHTML = data.slice(start, end).map((item) =>
`<div style="height: ${item.height}px; border: 1px solid black;">
${item.i}
</div>`
).join('');
});
// 使用 delta 滚动方式， 向下滚动 1000px
btn.addEventListener('click', () => {
scrollv.scrollv('delta', { dt: 1000 })
})
</script>
FAQs
a web component scroll tool
We found that scrollv demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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