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    Interface KeyboardEvent

    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.

    MDN Reference

    interface KeyboardEvent {
        altKey: boolean;
        AT_TARGET: 2;
        bubbles: boolean;
        BUBBLING_PHASE: 3;
        cancelable: boolean;
        cancelBubble: boolean;
        CAPTURING_PHASE: 1;
        charCode: number;
        code: string;
        composed: boolean;
        ctrlKey: boolean;
        currentTarget: EventTarget | null;
        defaultPrevented: boolean;
        detail: number;
        DOM_KEY_LOCATION_LEFT: 1;
        DOM_KEY_LOCATION_NUMPAD: 3;
        DOM_KEY_LOCATION_RIGHT: 2;
        DOM_KEY_LOCATION_STANDARD: 0;
        eventPhase: number;
        isComposing: boolean;
        isTrusted: boolean;
        key: string;
        keyCode: number;
        location: number;
        metaKey: boolean;
        NONE: 0;
        repeat: boolean;
        returnValue: boolean;
        shiftKey: boolean;
        srcElement: EventTarget | null;
        target: EventTarget | null;
        timeStamp: number;
        type: string;
        view: Window | null;
        which: number;
        composedPath(): EventTarget[];
        getModifierState(keyArg: string): boolean;
        initEvent(type: string, bubbles?: boolean, cancelable?: boolean): void;
        initKeyboardEvent(
            typeArg: string,
            bubblesArg?: boolean,
            cancelableArg?: boolean,
            viewArg?: Window | null,
            keyArg?: string,
            locationArg?: number,
            ctrlKey?: boolean,
            altKey?: boolean,
            shiftKey?: boolean,
            metaKey?: boolean,
        ): void;
        initUIEvent(
            typeArg: string,
            bubblesArg?: boolean,
            cancelableArg?: boolean,
            viewArg?: Window | null,
            detailArg?: number,
        ): void;
        preventDefault(): void;
        stopImmediatePropagation(): void;
        stopPropagation(): void;
    }

    Hierarchy (View Summary)

    Index

    Properties

    altKey AT_TARGET bubbles BUBBLING_PHASE cancelable cancelBubble CAPTURING_PHASE charCode code composed ctrlKey currentTarget defaultPrevented detail DOM_KEY_LOCATION_LEFT DOM_KEY_LOCATION_NUMPAD DOM_KEY_LOCATION_RIGHT DOM_KEY_LOCATION_STANDARD eventPhase isComposing isTrusted key keyCode location metaKey NONE repeat returnValue shiftKey srcElement target timeStamp type view which

    Methods

    composedPath getModifierState initEvent initKeyboardEvent initUIEvent preventDefault stopImmediatePropagation stopPropagation

    Properties

    altKey: boolean

    The KeyboardEvent.altKey read-only property is a boolean value that indicates if the alt key (Option or ⌥ on macOS) was pressed (true) or not (false) when the event occurred.

    MDN Reference

    AT_TARGET: 2
    bubbles: boolean

    The bubbles read-only property of the Event interface indicates whether the event bubbles up through the DOM tree or not.

    MDN Reference

    BUBBLING_PHASE: 3
    cancelable: boolean

    The cancelable read-only property of the Event interface indicates whether the event can be canceled, and therefore prevented as if the event never happened.

    MDN Reference

    cancelBubble: boolean

    The cancelBubble property of the Event interface is deprecated.

    MDN Reference

    CAPTURING_PHASE: 1
    charCode: number

    The charCode read-only property of the pressed during a Element/keypress_event event.

    MDN Reference

    code: string

    The KeyboardEvent.code property represents a physical key on the keyboard (as opposed to the character generated by pressing the key).

    MDN Reference

    composed: boolean

    The read-only composed property of the or not the event will propagate across the shadow DOM boundary into the standard DOM.

    MDN Reference

    ctrlKey: boolean

    The KeyboardEvent.ctrlKey read-only property returns a boolean value that indicates if the control key was pressed (true) or not (false) when the event occurred.

    MDN Reference

    currentTarget: EventTarget | null

    The currentTarget read-only property of the Event interface identifies the element to which the event handler has been attached.

    MDN Reference

    defaultPrevented: boolean

    The defaultPrevented read-only property of the Event interface returns a boolean value indicating whether or not the call to Event.preventDefault() canceled the event.

    MDN Reference

    detail: number

    The UIEvent.detail read-only property, when non-zero, provides the current (or next, depending on the event) click count.

    MDN Reference

    DOM_KEY_LOCATION_LEFT: 1
    DOM_KEY_LOCATION_NUMPAD: 3
    DOM_KEY_LOCATION_RIGHT: 2
    DOM_KEY_LOCATION_STANDARD: 0
    eventPhase: number

    The eventPhase read-only property of the being evaluated.

    MDN Reference

    isComposing: boolean

    The KeyboardEvent.isComposing read-only property returns a boolean value indicating if the event is fired within a composition session, i.e., after Element/compositionstart_event and before Element/compositionend_event.

    MDN Reference

    isTrusted: boolean

    The isTrusted read-only property of the when the event was generated by the user agent (including via user actions and programmatic methods such as HTMLElement.focus()), and false when the event was dispatched via The only exception is the click event, which initializes the isTrusted property to false in user agents.

    MDN Reference

    key: string

    The KeyboardEvent interface's key read-only property returns the value of the key pressed by the user, taking into consideration the state of modifier keys such as Shift as well as the keyboard locale and layout.

    MDN Reference

    keyCode: number

    The deprecated KeyboardEvent.keyCode read-only property represents a system and implementation dependent numerical code identifying the unmodified value of the pressed key.

    MDN Reference

    location: number

    The KeyboardEvent.location read-only property returns an unsigned long representing the location of the key on the keyboard or other input device.

    MDN Reference

    metaKey: boolean

    The KeyboardEvent.metaKey read-only property returning a boolean value that indicates if the Meta key was pressed (true) or not (false) when the event occurred.

    MDN Reference

    NONE: 0
    repeat: boolean

    The repeat read-only property of the true if the given key is being held down such that it is automatically repeating.

    MDN Reference

    returnValue: boolean

    The Event property returnValue indicates whether the default action for this event has been prevented or not.

    MDN Reference

    shiftKey: boolean

    The KeyboardEvent.shiftKey read-only property is a boolean value that indicates if the shift key was pressed (true) or not (false) when the event occurred.

    MDN Reference

    srcElement: EventTarget | null

    The deprecated Event.srcElement is an alias for the Event.target property.

    MDN Reference

    target: EventTarget | null

    The read-only target property of the dispatched.

    MDN Reference

    timeStamp: number

    The timeStamp read-only property of the Event interface returns the time (in milliseconds) at which the event was created.

    MDN Reference

    type: string

    The type read-only property of the Event interface returns a string containing the event's type.

    MDN Reference

    view: Window | null

    The UIEvent.view read-only property returns the is the Window object the event happened in.

    MDN Reference

    which: number

    The UIEvent.which read-only property of the UIEvent interface returns a number that indicates which button was pressed on the mouse, or the numeric keyCode or the character code (charCode) of the key pressed on the keyboard.

    MDN Reference

    Methods

    • The composedPath() method of the Event interface returns the event's path which is an array of the objects on which listeners will be invoked.

      MDN Reference

      Returns EventTarget[]

    • The KeyboardEvent.getModifierState() method returns the current state of the specified modifier key: true if the modifier is active (that is the modifier key is pressed or locked), otherwise, false.

      MDN Reference

      Parameters

      • keyArg: string

      Returns boolean

    • The Event.initEvent() method is used to initialize the value of an event created using Document.createEvent().

      Parameters

      • type: string
      • Optionalbubbles: boolean
      • Optionalcancelable: boolean

      Returns void

      MDN Reference

    • The KeyboardEvent.initKeyboardEvent() method initializes the attributes of a keyboard event object.

      Parameters

      • typeArg: string
      • OptionalbubblesArg: boolean
      • OptionalcancelableArg: boolean
      • OptionalviewArg: Window | null
      • OptionalkeyArg: string
      • OptionallocationArg: number
      • OptionalctrlKey: boolean
      • OptionalaltKey: boolean
      • OptionalshiftKey: boolean
      • OptionalmetaKey: boolean

      Returns void

      MDN Reference

    • The UIEvent.initUIEvent() method initializes a UI event once it's been created.

      Parameters

      • typeArg: string
      • OptionalbubblesArg: boolean
      • OptionalcancelableArg: boolean
      • OptionalviewArg: Window | null
      • OptionaldetailArg: number

      Returns void

      MDN Reference

    • The preventDefault() method of the Event interface tells the user agent that if the event does not get explicitly handled, its default action should not be taken as it normally would be.

      MDN Reference

      Returns void

    • The stopImmediatePropagation() method of the If several listeners are attached to the same element for the same event type, they are called in the order in which they were added.

      MDN Reference

      Returns void

    • The stopPropagation() method of the Event interface prevents further propagation of the current event in the capturing and bubbling phases.

      MDN Reference

      Returns void

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