Duplicate names of two events of demo loaded on the whole page in the loading component of the [bug report] document

[MBearo]

Element UI version

2.12.0

OS/Browsers version

chrome 79

Vue version

2.6.10

Reproduction Link

https://jsfiddle.net/mmx38qxw/

Steps to reproduce

https://element.eleme.io/#/zh-CN/component/loading

What is Expected?

click方法不同名

What is actually happening?

click方法同名

[element-bot]

Translation of this issue:

###Element UI version
2.12.0

###OS / browsers version
Chrome 79

###Vue version
2.6.10

###Reproduction link
Https://jsfiddle.net/mmx38qxw/

###Steps to reproduce
Https://element.eleme.io/zh-cn/component/loading

###What is expected?
Click method does not have the same name

###What is actually happening?
Click method has the same name