只读alt只读AT_只读bubblesReturns true or false depending on how event was initialized. True if event goes through its target's ancestors in reverse tree order, and false otherwise.
只读BUBBLING_只读cancelableReturns true or false depending on how event was initialized. Its return value does not always carry meaning, but true can indicate that part of the operation during which event was dispatched, can be canceled by invoking the preventDefault() method.
只读CAPTURING_只读char只读code只读composedReturns true or false depending on how event was initialized. True if event invokes listeners past a ShadowRoot node that is the root of its target, and false otherwise.
只读ctrl只读currentReturns the object whose event listener's callback is currently being invoked.
只读defaultReturns true if preventDefault() was invoked successfully to indicate cancelation, and false otherwise.
只读detail只读DOM_只读DOM_只读DOM_只读DOM_只读eventReturns the event's phase, which is one of NONE, CAPTURING_PHASE, AT_TARGET, and BUBBLING_PHASE.
只读is只读isReturns true if event was dispatched by the user agent, and false otherwise.
只读key只读key只读location只读meta只读NONE只读repeat只读shift只读src只读targetReturns the object to which event is dispatched (its target).
只读timeReturns the event's timestamp as the number of milliseconds measured relative to the time origin.
只读typeReturns the type of event, e.g. "click", "hashchange", or "submit".
只读view只读whichReturns the invocation target objects of event's path (objects on which listeners will be invoked), except for any nodes in shadow trees of which the shadow root's mode is "closed" that are not reachable from event's currentTarget.
可选bubblesArg: boolean可选cancelableArg: boolean可选viewArg: null | Window可选keyArg: string可选locationArg: number可选ctrlKey: boolean可选altKey: boolean可选shiftKey: boolean可选metaKey: boolean
KeyboardEvent objects describe a user interaction with the keyboard; each event describes a single interaction between the user and a key (or combination of a key with modifier keys) on the keyboard.