Constructor
(abstract) new Track(optionsopt)
Create an instance of this class.
| Name | Type | Attributes | Default | Description | |||||||||||||||||||||||||
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options | Object | <optional> | {} | Object of option names and values Properties
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Extends
Members
(protected) allowedEvents_
An object containing event names as keys and booleans as values.
NOTE: If an event name is set to a true value here EventTarget#trigger will have extra functionality. See that function for more information.
| Name | Type | Description |
|---|---|---|
EventTarget.prototype.allowedEvents_ |
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(readonly) id :string
The id of this track. Cannot be changed after creation.
- string
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(readonly) kind :string
The kind of track that this is. Cannot be changed after creation.
- string
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label :string
The label of this track. Cannot be changed after creation.
- string
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(readonly) language :string
The two letter language code for this track. Cannot be changed after creation.
- string
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Methods
addEventListener()
An alias of EventTarget#on. Allows EventTarget to mimic the standard DOM API.
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any(type, fn)
This function will add an event listener that gets triggered only once and is removed from all events. This is like adding an array of event listeners with EventTarget#on that calls EventTarget#off on all events the first time it is triggered.
| Name | Type | Description |
|---|---|---|
type | string | | An event name or an array of event names. |
fn | function | The function to be called once for each event name. |
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dispatchEvent()
An alias of EventTarget#trigger. Allows EventTarget to mimic the standard DOM API.
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off(type, fn)
Removes an event listener for a specific event from an instance of EventTarget. This makes it so that the event listener will no longer get called when the named event happens.
| Name | Type | Description |
|---|---|---|
type | string | | An event name or an array of event names. |
fn | function | The function to remove. |
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on(type, fn)
Adds an event listener to an instance of an EventTarget. An event listener is a function that will get called when an event with a certain name gets triggered.
| Name | Type | Description |
|---|---|---|
type | string | | An event name or an array of event names. |
fn | function | The function to call with |
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one(type, fn)
This function will add an event listener that gets triggered only once. After the first trigger it will get removed. This is like adding an event listener with EventTarget#on that calls EventTarget#off on itself.
| Name | Type | Description |
|---|---|---|
type | string | | An event name or an array of event names. |
fn | function | The function to be called once for each event name. |
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removeEventListener()
An alias of EventTarget#off. Allows EventTarget to mimic the standard DOM API.
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trigger(event)
This function causes an event to happen. This will then cause any event listeners that are waiting for that event, to get called. If there are no event listeners for an event then nothing will happen.
If the name of the Event that is being triggered is in EventTarget.allowedEvents_. Trigger will also call the on + uppercaseEventName function.
Example: 'click' is in EventTarget.allowedEvents_, so, trigger will attempt to call onClick if it exists.
| Name | Type | Description |
|---|---|---|
event | string | | The name of the event, an |
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Events
labelchange
An event that fires when label changes on this track.
Note: This is not part of the spec!
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