capturer

1.It does not allow interception of events targeted to the capturer's ancestors, its siblings, or its sibling's descendants.

它不允许位在捕捉者的父节，同级节或者同级节的子节上的件被拦截。

2.Once specified, event capture intercepts all events of the specified type targeted toward any of the capturer's descendants.

一旦指，件捕捉会拦截所有指向捕捉者的任何子节的指类型的件。