videojs文档翻译-Component

Component

所有UI组件的基类。 组件是UI对象，它们表示DOM对象和DOM中的元素。 他们可以是其他组件的子组件，也可以有自己的子组件。

组件也可以使用EventTarget的方法

Constructor

new Component(player, optionsopt, readyopt)

创建此类的实例。

Parameters:

Methods

static getComponent(name) → {Component}

component.js, line 1503

Get a Component based on the name it was registered with.

Parameters:

Name	Type	Description
name	string	The Name of the component to get.

Returns:

Component -

The Component that got registered under the given name.

Deprecated:

• In `videojs` 6 this will not return `Component`s that were not registered using Component.registerComponent. Currently we check the global `videojs` object for a `Component` name and return that if it exists.

static registerComponent(name, ComponentToRegister) → {Component}

component.js, line 1437

Register a Component with videojs given the name and the component.

NOTE: Techs should not be registered as a Component. Techs should be registered using Tech.registerTech or videojs:videojs.registerTech.

NOTE: This function can also be seen on videojs as videojs:videojs.registerComponent.

Parameters:

Name	Type	Description
name	string	The name of the Component to register.
ComponentToRegister	Component	The Component class to register.

Returns:

Component -

The Component that was registered.

$(selector, contextopt) → {Element|null}

component.js, line 666

Find a single DOM element matching a selector. This can be within the Components contentEl() or another custom context.

Parameters:

Name	Type	Attributes	Default	Description
selector	string			A valid CSS selector, which will be passed to querySelector.
context	Element | string	<optional>	this.contentEl()	A DOM element within which to query. Can also be a selector string in which case the first matching element will get used as context. If missing this.contentEl() gets used. If this.contentEl() returns nothing it falls back to document.

Returns:

Element | null -

the dom element that was found, or null

See:

• Information on CSS Selectors

$$(selector, contextopt) → {NodeList}

component.js, line 688

Finds all DOM element matching a selector. This can be within the Components contentEl() or another custom context.

Parameters:

Name	Type	Attributes	Default	Description
selector	string			A valid CSS selector, which will be passed to querySelectorAll.
context	Element | string	<optional>	this.contentEl()	A DOM element within which to query. Can also be a selector string in which case the first matching element will get used as context. If missing this.contentEl() gets used. If this.contentEl() returns nothing it falls back to document.

Returns:

NodeList -

a list of dom elements that were found

See:

• Information on CSS Selectors

addChild(child, optionsopt, indexopt) → {Component}

component.js, line 377

Add a child Component inside the current Component.

Parameters:

Name	Type	Attributes	Default	Description
child	string | Component			The name or instance of a child to add.
options	Object	<optional>	{}	The key/value store of options that will get passed to children of the child.
index	number	<optional>	this.children_.length	The index to attempt to add a child into.

Returns:

Component -

The Component that gets added as a child. When using a string the Component will get created by this process.

addClass(classToAdd)

component.js, line 712

Add a CSS class name to the Components element.

Parameters:

Name	Type	Description
classToAdd	string	CSS class name to add

blur()

component.js, line 1049

Remove the focus from this component

abstract buildCSSClass() → {string}

component.js, line 586

Builds the default DOM class name. Should be overriden by sub-components.

Returns:

string -

The DOM class name for this object.

cancelAnimationFrame(id) → {number}

component.js, line 1401

Cancels a queued callback passed to Component#requestAnimationFrame (rAF).

If you queue an rAF callback via Component#requestAnimationFrame, use this function instead of window.cancelAnimationFrame. If you don‘t, your dispose listener will not get cleaned up until Component#dispose!

Parameters:

Name	Type	Description
id	number	The rAF ID to clear. The return value of Component#requestAnimationFrame.

Returns:

number -

Returns the rAF ID that was cleared.

See:

• Similar to

children() → {Array}

component.js, line 323

Get an array of all child components

Returns:

Array -

The children

clearInterval(intervalId) → {number}

component.js, line 1331

Clears an interval that gets created via window.setInterval or Component#setInterval. If you set an inteval via Component#setInterval use this function instead ofwindow.clearInterval. If you don‘t your dispose listener will not get cleaned up until Component#dispose!

Parameters:

Name	Type	Description
intervalId	number	The id of the interval to clear. The return value of Component#setInterval or window.setInterval.

Returns:

number -

Returns the interval id that was cleared.

See:

• Similar to

clearTimeout(timeoutId) → {number}

component.js, line 1268

Clears a timeout that gets created via window.setTimeout or Component#setTimeout. If you set a timeout via Component#setTimeout use this function instead ofwindow.clearTimout. If you don‘t your dispose listener will not get cleaned up until Component#dispose!

Parameters:

Name	Type	Description
timeoutId	number	The id of the timeout to clear. The return value of Component#setTimeout or window.setTimeout.

Returns:

number -

Returns the timeout id that was cleared.

See:

• Similar to

contentEl() → {Element}

component.js, line 292

Return the Components DOM element. This is where children get inserted. This will usually be the the same as the element returned in Component#el.

Returns:

Element -

The content element for this Component.

createEl(tagNameopt, propertiesopt, attributesopt) → {Element}

component.js, line 212

Create the Components DOM element.

Parameters:

Name	Type	Attributes	Description
tagName	string	<optional>	Element‘s DOM node type. e.g. ‘div‘
properties	Object	<optional>	An object of properties that should be set.
attributes	Object	<optional>	An object of attributes that should be set.

Returns:

Element -

The element that gets created.

currentDimension(widthOrHeight) → {number}

component.js, line 964

Get the width or the height of the Component elements computed style. Uses window.getComputedStyle.

Parameters:

Name	Type	Description
widthOrHeight	string	A string containing ‘width‘ or ‘height‘. Whichever one you want to get.

Returns:

number -

The dimension that gets asked for or 0 if nothing was set for that dimension.

currentDimensions() → {Component~DimensionObject}

component.js, line 1012

Get an object that contains width and height values of the Components computed style.

Returns:

Component~DimensionObject -

The dimensions of the components element

currentHeight() → {number}

component.js, line 1035

Get the height of the Components computed style. Uses window.getComputedStyle.

Returns:

number -

height The height of the Components computed style.

currentWidth() → {number}

component.js, line 1025

Get the width of the Components computed style. Uses window.getComputedStyle.

Returns:

number -

width The width of the Components computed style.

dimension(widthOrHeight, numopt, skipListenersopt) → {number}

component.js, line 902

Get or set width or height of the Component element. This is the shared code for the Component#width and Component#height.

Things to know:

• If the width or height in an number this will return the number postfixed with ‘px‘.
• If the width/height is a percent this will return the percent postfixed with ‘%‘
• Hidden elements have a width of 0 with window.getComputedStyle. This function defaults to the Components style.width and falls back to window.getComputedStyle. Seethis for more information
• If you want the computed style of the component, use Component#currentWidth and {Component#currentHeight

Parameters:

Name	Type	Attributes	Description
widthOrHeight	string		8 ‘width‘ or ‘height‘
num	number | string	<optional>	8 New dimension
skipListeners	boolean	<optional>	Skip componentresize event trigger

Fires:

• Component#event:componentresize

Returns:

number -

The dimension when getting or 0 if unset

dimensions(width, height)

component.js, line 868

Set both the width and height of the Component element at the same time.

Parameters:

Name	Type	Description
width	number | string	Width to set the Components element to.
height	number | string	Height to set the Components element to.

dispose()

component.js, line 114

Dispose of the Component and all child components.

Fires:

• Component#event:dispose

el() → {Element}

component.js, line 193

Get the Components DOM element

Returns:

Element -

The DOM element for this Component.

enableTouchActivity()

component.js, line 1173

This function reports user activity whenever touch events happen. This can get turned off by any sub-components that wants touch events to act another way.

Report user touch activity when touch events occur. User activity gets used to determine when controls should show/hide. It is simple when it comes to mouse events, because any mouse event should show the controls. So we capture mouse events that bubble up to the player and report activity when that happens. With touch events it isn‘t as easy as touchstart andtouchend toggle player controls. So touch events can‘t help us at the player level either.

User activity gets checked asynchronously. So what could happen is a tap event on the video turns the controls off. Then the touchend event bubbles up to the player. Which, if it reported user activity, would turn the controls right back on. We also don‘t want to completely block touch events from bubbling up. Furthermore a touchmove event and anything other than a tap, should not turn controls back on.

Listens to Events:

• Component#event:touchstart
• Component#event:touchmove
• Component#event:touchend
• Component#event:touchcancel

focus()

component.js, line 1042

Set the focus to this component

getAttribute(attribute) → {string|null}

component.js, line 792

Get the value of an attribute on the Components element.

Parameters:

Name	Type	Description
attribute	string	Name of the attribute to get the value from.

Returns:

string | null -

• The value of the attribute that was asked for.

    - Can be an empty string on some browsers if the attribute does not exist
      or has no value
    - Most browsers will return null if the attibute does not exist or has
      no value.

See:

• DOM API

getChild(name) → {Component|undefined}

component.js, line 349

Returns the child Component with the given name.

Parameters:

Name	Type	Description
name	string	The name of the child Component to get.

Returns:

Component | undefined -

The child Component with the given name or undefined.

getChildById(id) → {Component|undefined}

component.js, line 336

Returns the child Component with the given id.

Parameters:

Name	Type	Description
id	string	The id of the child Component to get.

Returns:

Component | undefined -

The child Component with the given id or undefined.

hasClass(classToCheck) → {boolean}

component.js, line 702

Check if a component‘s element has a CSS class name.

Parameters:

Name	Type	Description
classToCheck	string	CSS class name to check.

Returns:

boolean -

• True if the Component has the class.

    - False if the `Component` does not have the class`

height(numopt, skipListenersopt) → {number|string}

component.js, line 855

Get or set the height of the component based upon the CSS styles. See Component#dimension for more detailed information.

Parameters:

Name	Type	Attributes	Description
num	number | string	<optional>	The height that you want to set postfixed with ‘%‘, ‘px‘ or nothing.
skipListeners	boolean	<optional>	Skip the componentresize event trigger

Returns:

number | string -

The width when getting, zero if there is no width. Can be a string postpixed with ‘%‘ or ‘px‘.

hide()

component.js, line 753

Hide the Components element if it is currently showing by adding the ‘vjs-hidden` class name to it.

id() → {string}

component.js, line 302

Get this Components ID

Returns:

string -

The id of this Component

initChildren()

component.js, line 483

Add and initialize default child Components based upon options.

localize(string, tokensopt, defaultValueopt) → {string}

component.js, line 254

Localize a string given the string in english.

If tokens are provided, it‘ll try and run a simple token replacement on the provided string. The tokens it loooks for look like {1} with the index being 1-indexed into the tokens array.

If a defaultValue is provided, it‘ll use that over string, if a value isn‘t found in provided language files. This is useful if you want to have a descriptive key for token replacement but have a succinct localized string and not require en.json to be included.

Currently, it is used for the progress bar timing.

{
  "progress bar timing: currentTime={1} duration={2}": "{1} of {2}"
}

It is then used like so:

this.localize(‘progress bar timing: currentTime={1} duration{2}‘,
              [this.player_.currentTime(), this.player_.duration()],
              ‘{1} of {2}‘);

Which outputs something like: 01:23 of 24:56.

Parameters:

Name	Type	Attributes	Description
string	string		The string to localize and the key to lookup in the language files.
tokens	Array.<string>	<optional>	If the current item has token replacements, provide the tokens here.
defaultValue	string	<optional>	Defaults to string. Can be a default value to use for token replacement if the lookup key is needed to be separate.

Returns:

string -

The localized string or if no localization exists the english string.

name() → {string}

component.js, line 313

Get the Components name. The name gets used to reference the Component and is set during registration.

Returns:

string -

The name of this Component.

options(obj) → {Object}

component.js, line 176

Deep merge of options objects with new options.

Note: When both obj and options contain properties whose values are objects. The two properties get merged using module:mergeOptions

Parameters:

Name	Type	Description
obj	Object	The object that contains new options.

Returns:

Object -

A new object of this.options_ and obj merged together.

Deprecated:

• since version 5

player() → {Player}

component.js, line 159

Return the Player that the Component has attached to.

Returns:

Player -

The player that this Component has attached to.

ready() → {Component}

component.js, line 600

Bind a listener to the component‘s ready state. Different from event listeners in that if the ready event has already happened it will trigger the function immediately.

Returns:

Component -

Returns itself; method can be chained.

removeAttribute(attribute)

component.js, line 819

Remove an attribute from the Components element.

Parameters:

Name	Type	Description
attribute	string	Name of the attribute to remove.

See:

• DOM API

removeChild(component)

component.js, line 447

Remove a child Component from this Components list of children. Also removes the child Components element from this Components element.

Parameters:

Name	Type	Description
component	Component	The child Component to remove.

removeClass(classToRemove)

component.js, line 722

Remove a CSS class name from the Components element.

Parameters:

Name	Type	Description
classToRemove	string	CSS class name to remove

requestAnimationFrame(fn) → {number}

component.js, line 1368

Queues up a callback to be passed to requestAnimationFrame (rAF), but with a few extra bonuses:

• Supports browsers that do not support rAF by falling back to Component#setTimeout.
• The callback is turned into a Component~GenericCallback (i.e. bound to the component).
• Automatic cancellation of the rAF callback is handled if the component is disposed before it is called.

Parameters:

Name	Type	Description
fn	Component~GenericCallback	A function that will be bound to this component and executed just before the browser‘s next repaint.

Listens to Events:

• Component#event:dispose

Returns:

number -

Returns an rAF ID that gets used to identify the timeout. It can also be used in Component#cancelAnimationFrame to cancel the animation frame callback.

See:

• Similar to

setAttribute(attribute, value)

component.js, line 807

Set the value of an attribute on the Component‘s element

Parameters:

Name	Type	Description
attribute	string	Name of the attribute to set.
value	string	Value to set the attribute to.

See:

• DOM API

setInterval(fn, interval) → {number}

component.js, line 1300

Creates a function that gets run every x milliseconds. This function is a wrapper around window.setInterval. There are a few reasons to use this one instead though.

1. It gets cleared via Component#clearInterval when Component#dispose gets called.
2. The function callback will be a Component~GenericCallback

Parameters:

Name	Type	Description
fn	Component~GenericCallback	The function to run every x seconds.
interval	number	Execute the specified function every x milliseconds.

Listens to Events:

• Component#event:dispose

Returns:

number -

Returns an id that can be used to identify the interval. It can also be be used in Component#clearInterval to clear the interval.

See:

• Similar to

setTimeout(fn, timeout) → {number}

component.js, line 1238

Creates a function that runs after an x millisecond timeout. This function is a wrapper around window.setTimeout. There are a few reasons to use this one instead though:

1. It gets cleared via Component#clearTimeout when Component#dispose gets called.
2. The function callback will gets turned into a Component~GenericCallback

Note: You can use window.clearTimeout on the id returned by this function. This will cause its dispose listener not to get cleaned up! Please use Component#clearTimeout or Component#dispose.

Parameters:

Name	Type	Description
fn	Component~GenericCallback	The function that will be run after timeout.
timeout	number	Timeout in milliseconds to delay before executing the specified function.

Listens to Events:

• Component#event:dispose

Returns:

number -

Returns a timeout ID that gets used to identify the timeout. It can also get used in Component#clearTimeout to clear the timeout that was set.

See:

• Similar to

show()

component.js, line 745

Show the Components element if it is hidden by removing the ‘vjs-hidden‘ class name from it.

toggleClass(classToToggle, predicateopt)

component.js, line 737

Add or remove a CSS class name from the component‘s element.

• classToToggle gets added when Component#hasClass would return false.
• classToToggle gets removed when Component#hasClass would return true.

Parameters:

Name	Type	Attributes	Description
classToToggle	string		The class to add or remove based on (@link Component#hasClass}
predicate	boolean | Dom~predicate	<optional>	An Dom~predicate function or a boolean

triggerReady()

component.js, line 621

Trigger all the ready listeners for this Component.

Fires:

• Component#event:ready

width(numopt, skipListenersopt) → {number|string}

component.js, line 837

Get or set the width of the component based upon the CSS styles. See Component#dimension for more detailed information.

Parameters:

Name	Type	Attributes	Description
num	number | string	<optional>	The width that you want to set postfixed with ‘%‘, ‘px‘ or nothing.
skipListeners	boolean	<optional>	Skip the componentresize event trigger

Returns:

number | string -

The width when getting, zero if there is no width. Can be a string postpixed with ‘%‘ or ‘px‘.

Type Definitions

DimensionObject

component.js, line 992

An object that contains width and height values of the Components computed style. Uses window.getComputedStyle.

Properties:

Name	Type	Description
width	number	The width of the Components computed style.
height	number	The height of the Components computed style.

GenericCallback()

component.js, line 1205

A callback that has no parameters and is bound into Components context.

This:

• Component

ReadyCallback()

component.js, line 27

A callback that is called when a component is ready. Does not have any paramters and any callback value will be ignored.

This:

• Component

Events

componentresize

component.js, line 920

Triggered when a component is resized.

Type:

• EventTarget~Event

dispose

component.js, line 116

Triggered when a Component is disposed.

Type:

• EventTarget~Event

Listeners of This Event:

• BigPlayButton#requestAnimationFrame
• BigPlayButton#setInterval
• BigPlayButton#setTimeout
• Button#requestAnimationFrame
• Button#setInterval
• Button#setTimeout
• ClickableComponent#requestAnimationFrame
• ClickableComponent#setInterval
• ClickableComponent#setTimeout
• CloseButton#requestAnimationFrame
• CloseButton#setInterval
• CloseButton#setTimeout
• Component#requestAnimationFrame
• Component#setInterval
• Component#setTimeout
• ControlBar#requestAnimationFrame
• ControlBar#setInterval
• ControlBar#setTimeout
• CurrentTimeDisplay#requestAnimationFrame
• CurrentTimeDisplay#setInterval
• CurrentTimeDisplay#setTimeout
• CustomControlSpacer#requestAnimationFrame
• CustomControlSpacer#setInterval
• CustomControlSpacer#setTimeout
• DurationDisplay#requestAnimationFrame
• DurationDisplay#setInterval
• DurationDisplay#setTimeout
• FullscreenToggle#requestAnimationFrame
• FullscreenToggle#setInterval
• FullscreenToggle#setTimeout
• LiveDisplay#requestAnimationFrame
• LiveDisplay#setInterval
• LiveDisplay#setTimeout
• LoadingSpinner#requestAnimationFrame
• LoadingSpinner#setInterval
• LoadingSpinner#setTimeout
• LoadProgressBar#requestAnimationFrame
• LoadProgressBar#setInterval
• LoadProgressBar#setTimeout
• MediaLoader#requestAnimationFrame
• MediaLoader#setInterval
• MediaLoader#setTimeout
• Menu#requestAnimationFrame
• Menu#setInterval
• Menu#setTimeout
• MenuButton#requestAnimationFrame
• MenuButton#setInterval
• MenuButton#setTimeout
• MenuItem#requestAnimationFrame
• MenuItem#setInterval
• MenuItem#setTimeout
• ModalDialog#requestAnimationFrame
• ModalDialog#setInterval
• ModalDialog#setTimeout
• MouseTimeDisplay#requestAnimationFrame
• MouseTimeDisplay#setInterval
• MouseTimeDisplay#setTimeout
• MuteToggle#requestAnimationFrame
• MuteToggle#setInterval
• MuteToggle#setTimeout
• Player#requestAnimationFrame
• Player#setInterval
• Player#setTimeout
• PlayProgressBar#requestAnimationFrame
• PlayProgressBar#setInterval
• PlayProgressBar#setTimeout
• PlayToggle#requestAnimationFrame
• PlayToggle#setInterval
• PlayToggle#setTimeout
• Popup#requestAnimationFrame
• Popup#setInterval
• Popup#setTimeout
• PopupButton#requestAnimationFrame
• PopupButton#setInterval
• PopupButton#setTimeout
• PosterImage#requestAnimationFrame
• PosterImage#setInterval
• PosterImage#setTimeout
• ProgressControl#requestAnimationFrame
• ProgressControl#setInterval
• ProgressControl#setTimeout
• RemainingTimeDisplay#requestAnimationFrame
• RemainingTimeDisplay#setInterval
• RemainingTimeDisplay#setTimeout
• Slider#requestAnimationFrame
• Slider#setInterval
• Slider#setTimeout
• Spacer#requestAnimationFrame
• Spacer#setInterval
• Spacer#setTimeout
• Tech#requestAnimationFrame
• Tech#setInterval
• Tech#setTimeout
• TextTrackDisplay#requestAnimationFrame
• TextTrackDisplay#setInterval
• TextTrackDisplay#setTimeout
• TextTrackSettings#requestAnimationFrame
• TextTrackSettings#setInterval
• TextTrackSettings#setTimeout
• TimeDivider#requestAnimationFrame
• TimeDivider#setInterval
• TimeDivider#setTimeout
• TimeTooltip#requestAnimationFrame
• TimeTooltip#setInterval
• TimeTooltip#setTimeout
• VolumeControl#requestAnimationFrame
• VolumeControl#setInterval
• VolumeControl#setTimeout
• VolumeLevel#requestAnimationFrame
• VolumeLevel#setInterval
• VolumeLevel#setTimeout
• VolumePanel#requestAnimationFrame
• VolumePanel#setInterval
• VolumePanel#setTimeout

Properties:

Name	Type	Attributes	Default	Description
bubbles	boolean	<optional>	false	set to false so that the close event does not bubble up

ready

component.js, line 638

Triggered when a Component is ready.

Type:

• EventTarget~Event

tap

component.js, line 1135

Triggered when a Component is tapped.

Type:

• EventTarget~Event