select组件中的popupScroll事件没有返回scrollTop或offsetHeight相关的数据

[663759994]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

1.4.10

Environment

macos，火狐：72.0.1，chrome：79.0.3945.117，VUE2.6.10

Reproduction link

https://www.antdv.com/components/select-cn/

Steps to reproduce

直接复制文档上的demo

What is expected?

应该有返回scrollTop或offsetHeight相关的数据来给我判断是否到达了底部，来实现分页加载，。

What is actually happening?

实际上返回来一些其他的东西，仔细查看来返回值，也并没有看到相关的字眼。这个在react上的版本似乎是有的

[wangxueliang]

有事件对象，自己获取啊......

[DiamondsZz]

@663759994 解决了吗

[DiamondsZz]

直接打印事件对象的target.scrollTop是有值的

在控制台里面查看事件对象的target.scrollTop却是0

很奇怪。。。

[xrkffgg]

https://codesandbox.io/s/affectionate-davinci-g58pd?file=/src/App.vue

触发的频率可以自己优化

[github-actions]

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