This in the execution functions bound by addEventListener and attachEvent is different _ basic knowledge

There are a lot of blog posts about the differences between addEventListener and attachEvent, but most of them focus on Firefoxchrome. The latter only exists in the IE series and there are many blog posts about the differences between addEventListener and attachEvent, however, most of them focus on Firefox chrome, which only exists in the IE series.

Recently, when I was writing an event proxy, I encountered a BUG and found that, apart from this, the execution functions bound to the two are different, the running context of the addEventListener and attachEvent functions is different.
A simple demo is used to describe the difference:

The Code is as follows:

<

<Test

<

Test1

<

Test2

<