[Bug Report] el-tabs的before-leave钩子会触发两次
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- Dominant language
- Vue
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Description
### Element UI version
2.15.7
### OS/Browsers version
Mac Chrome
### Vue version
2.6.14
### Reproduction Link
https://codepen.io/ziyoung/pen/LKNBqB
### Steps to reproduce
不知道是不是我操作错误或理解有误
tabs组件的before-leave钩子
在返回$confirm这样的Promise时,点击时会触发一次钩子,Promise被resolve时也会触发一次
两次的activeName和oldActiveName是一样的
导致出现两次弹窗,目前解决办法是再找一个变量控制是否弹出confirm
另:before-leave钩子中$confirm被取消时仍不会拦截
解决办法详见 https://github.com/ElemeFE/element/issues/21719
### What is Expected?
如果是组件特性则忽略
如果组件有误则修复触发时机
### What is actually happening?
在返回$confirm这样的Promise时,点击时会触发一次钩子,Promise被resolve时也会触发一次
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