The first thing you'll notice is that there is no click function, but rather an observe function that takes the event as an argument before the function reference itself.

您首先将注意到没有click函数，而是使用了 observe 函数，该函数在引用它自身之前将事件作为参数。

youdao

The first thing you'll notice is that there is no click function, but rather an observe function that takes the event as an argument before the function reference itself.

您首先将注意到没有click函数，而是使用了 observe 函数，该函数在引用它自身之前将事件作为参数。

youdao