ViewerEvent Interface

Namespace:

@gembox/pdfviewer

Assembly:

@gembox/pdfviewer

Represents a base event interface for the PDF viewer that provides functionality similar to the standard DOM Event interface, allowing events to be canceled.

• TypeScript

export declare interface ViewerEvent

Remarks

This interface defines the core event handling capabilities including:

• The ability to check if an event's default action has been prevented.
• The ability to prevent the default action of an event.

Fields

defaultPrevented

Gets a value indicating whether the event's default action has been canceled.

• TypeScript

readonly defaultPrevented: boolean;

Remarks

The defaultPrevented read-only property returns true if the call to Event.preventDefault() canceled the event, otherwise it returns false.

Methods

preventDefault

Cancels the event if it is cancelable, without stopping further propagation of the event.

• TypeScript

preventDefault(): void;

Remarks

This method call indicates that the event's default action should be prevented. If the event is not cancelable, this method has no effect. The event can be prevented to stop the default behavior from occurring.