Event.cancelable

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概要

表示事件是否能被取消。

語法

bool = event.cancelable
  • 布林值,若為 true 代表事件可以被取消。

範例

var bool = event.cancelable;

布林值為 true 或 false 取決於是否能取消事件的預設行為。

備註

Whether an event can be canceled or not is something that's determined when that event is initialized.

To cancel an event, call the preventDefault() method on the event. This keeps the implementation from executing the default action that is associated with the event.

規範

Specification Status Comment
DOM
The definition of 'Event.cancelable' in that specification.
Living Standard  
DOM4
The definition of 'Event.cancelable' in that specification.
Recommendation  
Document Object Model (DOM) Level 2 Events Specification
The definition of 'Event.cancelable' in that specification.
Recommendation Initial definition.

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