The event bound to TreeSelect @blur is executed when the focus enters the TreeSelect, and not executed when the focus moves out of the TreeSelect

[huaxiaocheng]

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

Version

1.7.7

Environment

win10, chrome, vue2.6.14

Reproduction link

Steps to reproduce

TreeSelect @blur绑定的事件，在焦点进入TreeSelect时执行，焦点移出TreeSelect时不执行

What is expected?

TreeSelect @blur绑定的事件，在焦点进入TreeSelect时不执行，焦点移出TreeSelect时执行

What is actually happening?

TreeSelect @blur绑定的事件，在焦点进入TreeSelect时执行，焦点移出TreeSelect时不执行

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焦点进入页面中的iframe编辑器时，需要TreeSelect移除焦点