这种事件处理模式显示如何使用事件路由此一方式，来减少附加处理常式的目标项目数。

This event-handling pattern shows how to use event routing as a technique for reducing the number of elements where a handler is attached.

youdao

这种事件处理模式显示如何使用事件路由此一方式，来减少附加处理常式的目标项目数。

This event-handling pattern shows how to use event routing as a technique for reducing the number of elements where a handler is attached.

youdao