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list-renderer

v1.1.1

Published

> 基础知识: [与 scroll 相关的方法](https://github.com/Witee/keep-learning/issues/12)

Readme

list-renderer

基础知识: 与 scroll 相关的方法

批量渲染列表, 优化性能.

应用场景:

可以一次性拿到所有列表数据, 滚动到底部时可以自动加载一部分新数据, 再次滚动可以再次加载, 直到全部加载完成.

| 参数 | 是否必选 | 类型 | 说明 | | ---------- | -------- | ------------- | ----------------------------------------------------------------------- | | children | 是 | JSX.Element[] | 需要批量加载的元素列表 | | pageSize | 是 | number | 每页渲染的数量 | | loader | 否 | JSX.Element | 加载时底部显示的加载指示符 | | onFinish | 否 | function | 全部加载完成后的回调 | | refreshKey | 否 | any | 此值更新时将重新获取 children 参数, 否则一直使用第一次加载时的 children |

示例代码如下:

demo

使用refreshKey 的情况:

demo

如果是一个列表, 如果 a[] 在做为useEffect 的依赖时, 会认为每次都是个新的对象, 这里将key转换为字符串 refreshKey={_items.map((i) => i.key).join() 作为依赖参数, 可以解决这个问题.