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video.js/docs/api/vjs.MediaLoader.md
Steve Heffernan 88f59d7ad6 Release 4.8.0
2014-09-03 08:43:58 -07:00

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vjs.MediaLoader

EXTENDS: vjs.Component
DEFINED IN: src/js/media/loader.js#L7

The Media Loader is the component that decides which playback technology to load when the player is initialized.

INDEX

METHODS

addChild( child, [options] )

Adds a child component inside this component

myComponent.el();
// -> <div class='my-component'></div>
myComonent.children();
// [empty array]

var myButton = myComponent.addChild('MyButton');
// -> <div class='my-component'><div class="my-button">myButton<div></div>
// -> myButton === myComonent.children()[0];

Pass in options for child constructors and options for children of the child

var myButton = myComponent.addChild('MyButton', {
  text: 'Press Me',
  children: {
    buttonChildExample: {
      buttonChildOption: true
    }
  }
});
PARAMETERS:
  • child String|vjs.Component The class name or instance of a child to add
  • options Object (OPTIONAL) Options, including options to be passed to children of the child.
RETURNS:
  • vjs.Component The child component (created by this process if a string was used)

inherited from: src/js/component.js#L356

addClass( classToAdd )

Add a CSS class name to the component's element

PARAMETERS:
  • classToAdd String Classname to add
RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L672

buildCSSClass()

Allows sub components to stack CSS class names

RETURNS:
  • String The constructed class name

inherited from: src/js/component.js#L515

children()

Get an array of all child components

var kids = myComponent.children();
RETURNS:
  • Array The children

inherited from: src/js/component.js#L290

contentEl()

Return the component's DOM element for embedding content. Will either be el_ or a new element defined in createEl.

RETURNS:
  • Element

inherited from: src/js/component.js#L233

createEl( [tagName], [attributes] )

Create the component's DOM element

PARAMETERS:
  • tagName String (OPTIONAL) Element's node type. e.g. 'div'
  • attributes Object (OPTIONAL) An object of element attributes that should be set on the element
RETURNS:
  • Element

inherited from: src/js/component.js#L194

dimensions( width, height )

Set both width and height at the same time

PARAMETERS:
  • width Number|String
  • height Number|String
RETURNS:
  • vjs.Component The component

inherited from: src/js/component.js#L784

dispose()

Dispose of the component and all child components

inherited from: src/js/component.js#L78

el()

Get the component's DOM element

var domEl = myComponent.el();
RETURNS:
  • Element

inherited from: src/js/component.js#L214

enableTouchActivity()

Report user touch activity when touch events occur

User activity is used to determine when controls should show/hide. It's relatively 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. We can't rely on touch events at the player level, because a tap (touchstart + touchend) on the video itself on mobile devices is meant to turn controls off (and on). User activity is 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)

Also a touchmove, touch+hold, and anything other than a tap is not supposed to turn the controls back on on a mobile device.

Here we're setting the default component behavior to report user activity whenever touch events happen, and this can be turned off by components that want touch events to act differently.

inherited from: src/js/component.js#L966

getChild( name )

Returns a child component with the provided name

PARAMETERS:
  • name
RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L324

getChildById( id )

Returns a child component with the provided ID

PARAMETERS:
  • id
RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L307

height( [num], [skipListeners] )

Get or set the height of the component (CSS values)

Setting the video tag dimension values only works with values in pixels. Percent values will not work. Some percents can be used, but width()/height() will return the number + %, not the actual computed width/height.

PARAMETERS:
  • num Number|String (OPTIONAL) New component height
  • skipListeners Boolean (OPTIONAL) Skip the resize event trigger
RETURNS:
  • vjs.Component This component, when setting the height
  • Number|String The height, when getting

inherited from: src/js/component.js#L773

hide()

Hide the component element if currently showing

RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L703

id()

Get the component's ID

var id = myComponent.id();
RETURNS:
  • String

inherited from: src/js/component.js#L252

init( player, options, ready )

PARAMETERS:
  • player
  • options
  • ready

defined in: src/js/media/loader.js#L9

initChildren()

Add and initialize default child components from options

// when an instance of MyComponent is created, all children in options
// will be added to the instance by their name strings and options
MyComponent.prototype.options_.children = {
  myChildComponent: {
    myChildOption: true
  }
}

// Or when creating the component
var myComp = new MyComponent(player, {
  children: {
    myChildComponent: {
      myChildOption: true
    }
  }
});

The children option can also be an Array of child names or child options objects (that also include a 'name' key).

var myComp = new MyComponent(player, {
  children: [
    'button',
    {
      name: 'button',
      someOtherOption: true
    }
  ]
});

inherited from: src/js/component.js#L475

name()

Get the component's name. The name is often used to reference the component.

var name = myComponent.name();
RETURNS:
  • String

inherited from: src/js/component.js#L271

off( [type], [fn] )

Remove an event listener from the component's element

myComponent.off("eventName", myFunc);
PARAMETERS:
  • type String (OPTIONAL) Event type. Without type it will remove all listeners.
  • fn Function (OPTIONAL) Event listener. Without fn it will remove all listeners for a type.
RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L554

on( type, fn )

Add an event listener to this component's element

var myFunc = function(){
  var myPlayer = this;
  // Do something when the event is fired
};

myPlayer.on("eventName", myFunc);

The context will be the component.

PARAMETERS:
  • type String The event type e.g. 'click'
  • fn Function The event listener
RETURNS:
  • vjs.Component self

inherited from: src/js/component.js#L540

one( type, fn )

Add an event listener to be triggered only once and then removed

PARAMETERS:
  • type String Event type
  • fn Function Event listener
RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L566

options( obj )

Deep merge of options objects

Whenever a property is an object on both options objects the two properties will be merged using vjs.obj.deepMerge.

This is used for merging options for child components. We want it to be easy to override individual options on a child component without having to rewrite all the other default options.

Parent.prototype.options_ = {
  children: {
    'childOne': { 'foo': 'bar', 'asdf': 'fdsa' },
    'childTwo': {},
    'childThree': {}
  }
}
newOptions = {
  children: {
    'childOne': { 'foo': 'baz', 'abc': '123' }
    'childTwo': null,
    'childFour': {}
  }
}

this.options(newOptions);

RESULT

{
  children: {
    'childOne': { 'foo': 'baz', 'asdf': 'fdsa', 'abc': '123' },
    'childTwo': null, // Disabled. Won't be initialized.
    'childThree': {},
    'childFour': {}
  }
}
PARAMETERS:
  • obj Object Object of new option values
RETURNS:
  • Object A NEW object of this.options_ and obj merged

inherited from: src/js/component.js#L173

player()

Return the component's player

RETURNS:
  • vjs.Player

inherited from: src/js/component.js#L120

ready( fn )

Bind a listener to the component's ready state

Different from event listeners in that if the ready event has already happend it will trigger the function immediately.

PARAMETERS:
  • fn Function Ready listener
RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L625

removeChild( component )

Remove a child component from this component's list of children, and the child component's element from this component's element

PARAMETERS:
  • component vjs.Component Component to remove

inherited from: src/js/component.js#L414

removeClass( classToRemove )

Remove a CSS class name from the component's element

PARAMETERS:
  • classToRemove String Classname to remove
RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L683

show()

Show the component element if hidden

RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L693

trigger( event )

Trigger an event on an element

myComponent.trigger('eventName');
myComponent.trigger({'type':'eventName'});
PARAMETERS:
  • event Event|Object|String A string (the type) or an event object with a type attribute
RETURNS:
  • vjs.Component self

inherited from: src/js/component.js#L580

triggerReady()

Trigger the ready listeners

RETURNS:
  • vjs.Component

inherited from: src/js/component.js#L644

width( [num], skipListeners )

Set or get the width of the component (CSS values)

Setting the video tag dimension values only works with values in pixels. Percent values will not work. Some percents can be used, but width()/height() will return the number + %, not the actual computed width/height.

PARAMETERS:
  • num Number|String (OPTIONAL) Optional width number
  • skipListeners Boolean Skip the 'resize' event trigger
RETURNS:
  • vjs.Component This component, when setting the width
  • Number|String The width, when getting

inherited from: src/js/component.js#L756

EVENTS

resize EVENT

Fired when the width and/or height of the component changes

inherited from: src/js/component.js#L866