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Class EventDispatcher

The EventDispatcher class is the base class for all classes that dispatch events.

export

Hierarchy

Index

Methods

Methods

has

  • has(type: string): boolean

  • Returns whether the listeners are registered for the specified event name.

    memberof

    EventDispatcher

    Parameters

    • type: string

    Returns boolean

off

  • Removes a registered listener function for the specified event.

    memberof

    EventDispatcher

    Parameters

    • type: string

      Name of the event to remove the listener for.

    • callback: Function

      Handler function to remove so it won't be executed next time the event is triggered.

    • Default value scope: any = null

    Returns EventDispatcher

offAll

on

  • on(type: string, callback: Function, scope?: any, priority?: number): EventDispatcher

  • Registers a listener function to be executed each time an event occurs

    memberof

    EventDispatcher

    Parameters

    • type: string

      Name of the event to listen for. Value can contain multiple event names separated by spaces to trigger the same handler function for each event name.

    • callback: Function

      Handler function to be called when the event occurs

    • Default value scope: any = null
    • Default value priority: number = 0

    Returns EventDispatcher

once

  • once(type: string, callback: Function, scope?: any, priority?: number): EventDispatcher

  • Registers a listener function to be executed the first time an event occurs.

    memberof

    EventDispatcher

    Parameters

    • type: string

      Name of the event to listen for. Value can contain multiple event names separated by spaces to trigger the same handler function for each event name.

    • callback: Function

      Handler function to be called when the event occurs

    • Default value scope: any = null
    • Default value priority: number = 0

    Returns EventDispatcher

trigger

  • Triggers the specified event so that all registered listeners will be executed with the specified parameters.

    memberof

    EventDispatcher

    Parameters

    • type: any

      Event name to trigger

    • Default value data: any = null

    Returns EventDispatcher

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