在 JavaScript 中，如果不作为 arg 传递，如何确定当前事件？

发布于 2024-12-06 15:33:38 字数 410 浏览 0 评论 0原文

在任意 JavaScript 函数中，我希望确定上游事件。

事件监听函数没有将事件传递给当前函数。据我所知，window.event 不是 WC3 并且不可用。

function listener(e) { subfunc(e.target); }

function subfunc( element) {
    // here I wish to know which if any event responsible for me being called
    var event = ?;
    switch( event.type ) { ... }
}

函数subfunc()如何确定当前事件？

（如果之前问过问题，请道歉 - 似乎一定是这样 - 但无法追踪到它。）

原文

In an arbitrary JavaScript function, I wish to determine the upstream event.

The event listener function did not pass the event do the current function. As far as I know, window.event is not WC3 and not available.

function listener(e) { subfunc(e.target); }

function subfunc( element) {
    // here I wish to know which if any event responsible for me being called
    var event = ?;
    switch( event.type ) { ... }
}

How does function subfunc() determine the current event?

(Apologize if question asked before - seems it must have been - but cannot track it down.)

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維他命╮ 2024-12-13 15:33:38

您可以这样做：

function listener(e) { subfunc.call(this, e); }

function subfunc( e ) {
    var element = this; //<- 'this' points to your element, 'e.type' is event type
    switch( e.type ) { ... }
}

还有其他方式：

function listener(e) { subfunc.call(e, e.target); }

function subfunc( element ) {
    var event = this; //<- 'this' points to your event object
    switch( event.type ) { ... }
}

You can do:

function listener(e) { subfunc.call(this, e); }

function subfunc( e ) {
    var element = this; //<- 'this' points to your element, 'e.type' is event type
    switch( e.type ) { ... }
}

Also other way:

function listener(e) { subfunc.call(e, e.target); }

function subfunc( element ) {
    var event = this; //<- 'this' points to your event object
    switch( event.type ) { ... }
}

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