import Observer from 'wavesurfer.js/src/util/observer.js'

public class | source

Observer

Observer class

Constructor Summary

Public Constructor
public	constructor() Instantiate Observer

Public Members
public	handlers: *

Public Methods
public	fireEvent(event: string, args: ...any) Manually fire an event
public	on(event: string, fn: function): ListenerDescriptor Attach a handler function for an event.
public	once(event: string, handler: function): ListenerDescriptor Attach a handler to an event.
public	setDisabledEventEmissions(eventNames: string[]) Disable firing a list of events by name.	since 4.0.0
public	un(event: string, fn: function) Remove an event handler.
public	unAll() Remove all event handlers.

Instantiate Observer

Manually fire an event

Name	Type	Attribute	Description
event	string		The event to fire manually
args	...any		The arguments with which to call the listeners

Attach a handler function for an event.

Name	Type	Attribute	Description
event	string		Name of the event to listen to
fn	function		The callback to trigger when the event is fired

The event descriptor

Attach a handler to an event. The handler is executed at most once per event type.

Name	Type	Attribute	Description
event	string		The event to listen to
handler	function		The callback that is only to be called once

The event descriptor

Disable firing a list of events by name. When specified, event handlers for any event type passed in here will not be called.

Name	Type	Attribute	Description
eventNames	string[]		an array of event names to disable emissions for

// disable seek and interaction events
wavesurfer.setDisabledEventEmissions(['seek', 'interaction']);

Remove an event handler.

Name	Type	Attribute	Description
event	string		Name of the event the listener that should be removed listens to
fn	function		The callback that should be removed

Remove all event handlers.