back-top component cannot work

[Rain120]

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

Version

1.1.2

Environment

antd 1.1.2 node 10.10.0 vue2.5.2

Reproduction link

https://github.com/vueComponent/ant-design-vue

Steps to reproduce

I had added the component at the App.vue, and I set the overflow property to auto，and the component cannot work. When I removed the property, it's work. And then, I review the code about the component of back-top, I found there was some style about overflow hidden, Is this property conflicting? And how to solve the problem?

What is expected?

use the overflow property and the back-top component is work too

What is actually happening?

the back-top component cannot work

[tangjinzhou]

you can set target to change monitor DOM scrolling changes.
Target default is window，if you add #app {overfolw:auto}，window scrolling position is not change.
Maybe you can change target to :target="()=>document.getElementById('app')".
https://vuecomponent.github.io/ant-design-vue/components/back-top/#API

[qifengwangye]

@tangjinzhou 采用了你的解决方法依然没有解决，我和提问者的情况是一样的，版本是1.3.2，无法提供在线代码，公司网络不允许

[github-actions]

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