TextareaItem autoHeight 时，频幕滚动问题

[LPegasus]

Version

1.6.7

Environment

ios 10.3 simulator、android 5.1motorola_XT1085、android 6.0 Samsung s6e

Reproduction link

https://gist.github.com/LPegasus/b5c109b85c56c234c4b946bad2b9c1a6

Steps to reproduce

• 输入 TextareaItem 填写很多很多文字，使频幕可滚动

• 触发 TextareaItem 的 componentDidUpdate

• fill plenty of words into a the first TextareaItem with autoHeight prop till the body scrollbar appears

• do any action to trigger the first TextareaItem's componentDidUpdate function

What is expected?

频幕稳定在原位置

window should be stable

What is actually happening?

频幕滚动

window scroll to top

---

TextareaItem componentDidUpdate 中把

textareaDom.style.height = ''; // 字数减少时能自动减小高度
textareaDom.style.height = textareaDom.scrollHeight +  'px';

延迟执行，可以解决此问题。

delay the above two code lines may useful.

[ant-design-bot]

It will be better to write your issue/comment in English, so more people can understand you.
And this means that more people can help you or benefit from your issue/comment.
See: ant-design/ant-design#4897

[silentcloud]

延迟执行不能解决这个问题，应该是判断当前是不是 focus

[Lawrence51]

延迟执行不能解决这个问题，应该是判断当前是不是 focus

这个判断应该是在哪里啊