Phaser Class: Loader

## Phaser. Loader

#### new Loader(game)

  The Loader handles loading all external content such as Images, Sounds, Texture Atlases and data files.

  The loader uses a combination of tag loading (eg. Image elements) and XHR and provides progress and completion callbacks.

  Parallel loading (see enableParallel) is supported and enabled by default.
  Load-before behavior of parallel resources is controlled by synchronization points as discussed in withSyncPoint.

  Texture Atlases can be created with tools such as Texture Packer and
  Shoebox

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `game` | Phaser.Game | A reference to the currently running game.

  Source - loader/Loader.js, line 22

### Members

#### <static, constant> PHYSICS_LIME_CORONA_JSON :number

  Source - loader/Loader.js, line 322

#### <static, constant> PHYSICS_PHASER_JSON :number

  Source - loader/Loader.js, line 328

#### <static, constant> TEXTURE_ATLAS_JSON_ARRAY :number

  Source - loader/Loader.js, line 304

#### <static, constant> TEXTURE_ATLAS_JSON_HASH :number

  Source - loader/Loader.js, line 310

#### <static, constant> TEXTURE_ATLAS_JSON_PYXEL :number

  Source - loader/Loader.js, line 334

#### <static, constant> TEXTURE_ATLAS_XML_STARLING :number

  Source - loader/Loader.js, line 316

#### _withSyncPointDepth

  A counter: if more than zero, files will be automatically added as a synchronization point.

  ##### Properties:

  Name | Type | Description
  --- | --- | ---
  `_withSyncPointDepth;` | integer |

  Source - loader/Loader.js, line 227

#### baseURL :string

  If you want to append a URL before the path of any asset you can set this here.
  Useful if allowing the asset base url to be configured outside of the game code.
  The string must end with a "/".

  Source - loader/Loader.js, line 83

#### <internal> cache :Phaser.Cache

  Local reference to the Phaser.Cache.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 36

#### crossOrigin :boolean|string

  The crossOrigin value applied to loaded images. Very often this needs to be set to 'anonymous'.

  ##### Type:

  - boolean | string
  Source - loader/Loader.js, line 74

#### enableParallel :boolean

  If true (the default) then parallel downloading will be enabled.

  To disable all parallel downloads this must be set to false prior to any resource being loaded.

  Source - loader/Loader.js, line 211

#### <internal> game :Phaser.Game

  Local reference to game.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 29

#### hasLoaded :boolean

  True if all assets in the queue have finished loading.

  Source - loader/Loader.js, line 57

#### headers :object

  Used to map the application mime-types to to the Accept header in XHR requests.
  If you don't require these mappings, or they cause problems on your server, then
  remove them from the headers object and the XHR request will not try to use them.

  This object can also be used to set the `X-Requested-With` header to
  `XMLHttpRequest` (or any other value you need). To enable this do:

  `this.load.headers.requestedWith = 'XMLHttpRequest'`

  before adding anything to the Loader. The XHR loader will then call:

  `setRequestHeader('X-Requested-With', this.headers['requestedWith'])`

  Default Value:
    - {"undefined":"application/xml"}
  Source - loader/Loader.js, line 122

#### isLoading :boolean

  True if the Loader is in the process of loading the queue.

  Source - loader/Loader.js, line 50

#### <internal> maxParallelDownloads :integer

  The number of concurrent / parallel resources to try and fetch at once.

  Many current browsers limit 6 requests per domain; this is slightly conservative.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 221

#### onFileComplete :Phaser.Signal

  This event is dispatched when a file has either loaded or failed to load.

  Any function bound to this will receive the following parameters:

  progress, file key, success?, total loaded files, total files

  Where progress is a number between 1 and 100 (inclusive) representing the percentage of the load.

  Source - loader/Loader.js, line 175

#### onFileError :Phaser.Signal

  This event is dispatched when a file (or pack) errors as a result of the load request.

  For files it will be triggered before `onFileComplete`. For packs it will be triggered before `onPackComplete`.

  Params: `(file key, file)`

  Source - loader/Loader.js, line 186

#### onFileStart :Phaser.Signal

  This event is dispatched immediately before a file starts loading.
  It's possible the file may fail (eg. download error, invalid format) after this event is sent.

  Params: `(progress, file key, file url)`

  Source - loader/Loader.js, line 162

#### onLoadComplete :Phaser.Signal

  This event is dispatched when the final file in the load queue has either loaded or failed.

  Source - loader/Loader.js, line 141

#### onLoadStart :Phaser.Signal

  This event is dispatched when the loading process starts: before the first file has been requested,
  but after all the initial packs have been loaded.

  Source - loader/Loader.js, line 134

#### onPackComplete :Phaser.Signal

  This event is dispatched when an asset pack has either loaded or failed to load.

  This is called when the asset pack manifest file has loaded and successfully added its contents to the loader queue.

  Params: `(pack key, success?, total packs loaded, total packs)`

  Source - loader/Loader.js, line 152

#### path :string

  The value of `path`, if set, is placed before any relative file path given. For example:

  `load.path = "images/sprites/"; load.image("ball", "ball.png"); load.image("tree", "level1/oaktree.png"); load.image("boom", "http://server.com/explode.png");`

  Would load the `ball` file from `images/sprites/ball.png` and the tree from
  `images/sprites/level1/oaktree.png` but the file `boom` would load from the URL
  given as it's an absolute URL.

  Please note that the path is added before the filename but after the baseURL (if set.)

  The string must end with a "/".

  Source - loader/Loader.js, line 103

#### <internal> preloadSprite :object

  You can optionally link a progress sprite with setPreloadSprite.

  This property is an object containing: sprite, rect, direction, width and height

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 67

#### progress

  The rounded load progress percentage value (from 0 to 100). See Phaser.Loader#progressFloat.

  ##### Properties:

  Type | Description
  --- | ---
  integer |

  Source - loader/Loader.js, line 3060

#### progressFloat

  The non-rounded load progress value (from 0.0 to 100.0).

  A general indicator of the progress.
  It is possible for the progress to decrease, after `onLoadStart`, if more files are dynamically added.

  ##### Properties:

  Type | Description
  --- | ---
  number |

  Source - loader/Loader.js, line 3042

#### resetLocked :boolean

  If true all calls to Loader.reset will be ignored. Useful if you need to create a load queue before swapping to a preloader state.

  Source - loader/Loader.js, line 43

#### useXDomainRequest :boolean

This method is deprecated and should not be used. It may be removed in the future.

If true and if the browser supports XDomainRequest, it will be used in preference for XHR.

This is only relevant for IE 9 and should only be enabled for IE 9 clients when required by the server/CDN.

Deprecated:
  - This is only relevant for IE 9.
Source - loader/Loader.js, line 196

### Methods

#### addSyncPoint(type, key) → {Phaser.Loader}

  Add a synchronization point to a specific file/asset in the load queue.

  This has no effect on already loaded assets.

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `type` | string | The type of resource to turn into a sync point (image, audio, xml, etc).
  `key` | string | Key of the file you want to turn into a sync point.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1675
  See:
    - withSyncPoint

#### <internal> addToFileList(type, key, url, properties, overwrite, extension) → {Phaser.Loader}

  Internal function that adds a new entry to the file list. Do not call directly.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `type` | string |  |  | The type of resource to add to the list (image, audio, xml, etc).
  `key` | string |  |  | The unique Cache ID key of this resource.
  `url` | string | <optional> |  | The URL the asset will be loaded from.
  `properties` | object | <optional> | (none) | Any additional properties needed to load the file. These are added directly to the added file object and overwrite any defaults.
  `overwrite` | boolean | <optional> | false | If true then this will overwrite a file asset of the same type/key. Otherwise it will only add a new asset. If overwrite is true, and the asset is already being loaded (or has been loaded), then it is appended instead.
  `extension` | string | <optional> |  | If no URL is given the Loader will sometimes auto-generate the URL based on the key, using this as the extension.

  ##### Returns:

  Phaser.Loader -

  This instance of the Phaser Loader.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 515

#### atlas(key, textureURL, atlasURL, atlasData, format) → {Phaser.Loader}

  Adds a Texture Atlas file to the current load queue.

  To create the Texture Atlas you can use tools such as:

  Texture Packer
  Shoebox

  If using Texture Packer we recommend you enable "Trim sprite names".
  If your atlas software has an option to "rotate" the resulting frames, you must disable it.

  You can choose to either load the data externally, by providing a URL to a json file.
  Or you can pass in a JSON object or String via the `atlasData` parameter.
  If you pass a String the data is automatically run through `JSON.parse` and then immediately added to the Phaser.Cache.

  If URLs are provided the files are not loaded immediately after calling this method, but are added to the load queue.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getImage(key)`. JSON files are automatically parsed upon load.
  If you need to control when the JSON is parsed then use `Loader.text` instead and parse the JSON file as needed.

  The URLs can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the textureURL isn't specified then the Loader will take the key and create a filename from that.
  For example if the key is "player" and textureURL is null then the Loader will set the URL to be "player.png".
  The same is true for the atlasURL. If atlasURL isn't specified and no atlasData has been provided then the Loader will
  set the atlasURL to be the key. For example if the key is "player" the atlasURL will be set to "player.json".

  If you do not desire this action then provide URLs and / or a data object.

  ##### Parameters:

  Name | Type | Argument | Description
  --- | --- | --- | ---
  `key` | string |  | Unique asset key of the texture atlas file.
  `textureURL` | string | <optional> | URL of the texture atlas image file. If undefined or `null` the url will be set to `<key>.png`, i.e. if `key` was "alien" then the URL will be "alien.png".
  `atlasURL` | string | <optional> | URL of the texture atlas data file. If undefined or `null` and no atlasData is given, the url will be set to `<key>.json`, i.e. if `key` was "alien" then the URL will be "alien.json".
  `atlasData` | object | <optional> | A JSON or XML data object. You don't need this if the data is being loaded from a URL.
  `format` | number | <optional> | The format of the data. Can be Phaser.Loader.TEXTURE_ATLAS_JSON_ARRAY (the default), Phaser.Loader.TEXTURE_ATLAS_JSON_HASH or Phaser.Loader.TEXTURE_ATLAS_XML_STARLING.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1544

#### atlasJSONArray(key, textureURL, atlasURL, atlasData) → {Phaser.Loader}

  Adds a Texture Atlas file to the current load queue.

  Unlike `Loader.atlasJSONHash` this call expects the atlas data to be in a JSON Array format.

  To create the Texture Atlas you can use tools such as:

  Texture Packer
  Shoebox

  If using Texture Packer we recommend you enable "Trim sprite names".
  If your atlas software has an option to "rotate" the resulting frames, you must disable it.

  You can choose to either load the data externally, by providing a URL to a json file.
  Or you can pass in a JSON object or String via the `atlasData` parameter.
  If you pass a String the data is automatically run through `JSON.parse` and then immediately added to the Phaser.Cache.

  If URLs are provided the files are not loaded immediately after calling this method, but are added to the load queue.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getImage(key)`. JSON files are automatically parsed upon load.
  If you need to control when the JSON is parsed then use `Loader.text` instead and parse the JSON file as needed.

  The URLs can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the textureURL isn't specified then the Loader will take the key and create a filename from that.
  For example if the key is "player" and textureURL is null then the Loader will set the URL to be "player.png".
  The same is true for the atlasURL. If atlasURL isn't specified and no atlasData has been provided then the Loader will
  set the atlasURL to be the key. For example if the key is "player" the atlasURL will be set to "player.json".

  If you do not desire this action then provide URLs and / or a data object.

  ##### Parameters:

  Name | Type | Argument | Description
  --- | --- | --- | ---
  `key` | string |  | Unique asset key of the texture atlas file.
  `textureURL` | string | <optional> | URL of the texture atlas image file. If undefined or `null` the url will be set to `<key>.png`, i.e. if `key` was "alien" then the URL will be "alien.png".
  `atlasURL` | string | <optional> | URL of the texture atlas data file. If undefined or `null` and no atlasData is given, the url will be set to `<key>.json`, i.e. if `key` was "alien" then the URL will be "alien.json".
  `atlasData` | object | <optional> | A JSON data object. You don't need this if the data is being loaded from a URL.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1398

#### atlasJSONHash(key, textureURL, atlasURL, atlasData) → {Phaser.Loader}

  Adds a Texture Atlas file to the current load queue.

  Unlike `Loader.atlas` this call expects the atlas data to be in a JSON Hash format.

  To create the Texture Atlas you can use tools such as:

  Texture Packer
  Shoebox

  If using Texture Packer we recommend you enable "Trim sprite names".
  If your atlas software has an option to "rotate" the resulting frames, you must disable it.

  You can choose to either load the data externally, by providing a URL to a json file.
  Or you can pass in a JSON object or String via the `atlasData` parameter.
  If you pass a String the data is automatically run through `JSON.parse` and then immediately added to the Phaser.Cache.

  If URLs are provided the files are not loaded immediately after calling this method, but are added to the load queue.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getImage(key)`. JSON files are automatically parsed upon load.
  If you need to control when the JSON is parsed then use `Loader.text` instead and parse the JSON file as needed.

  The URLs can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the textureURL isn't specified then the Loader will take the key and create a filename from that.
  For example if the key is "player" and textureURL is null then the Loader will set the URL to be "player.png".
  The same is true for the atlasURL. If atlasURL isn't specified and no atlasData has been provided then the Loader will
  set the atlasURL to be the key. For example if the key is "player" the atlasURL will be set to "player.json".

  If you do not desire this action then provide URLs and / or a data object.

  ##### Parameters:

  Name | Type | Argument | Description
  --- | --- | --- | ---
  `key` | string |  | Unique asset key of the texture atlas file.
  `textureURL` | string | <optional> | URL of the texture atlas image file. If undefined or `null` the url will be set to `<key>.png`, i.e. if `key` was "alien" then the URL will be "alien.png".
  `atlasURL` | string | <optional> | URL of the texture atlas data file. If undefined or `null` and no atlasData is given, the url will be set to `<key>.json`, i.e. if `key` was "alien" then the URL will be "alien.json".
  `atlasData` | object | <optional> | A JSON data object. You don't need this if the data is being loaded from a URL.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1444

#### atlasXML(key, textureURL, atlasURL, atlasData) → {Phaser.Loader}

  Adds a Texture Atlas file to the current load queue.

  This call expects the atlas data to be in the Starling XML data format.

  To create the Texture Atlas you can use tools such as:

  Texture Packer
  Shoebox

  If using Texture Packer we recommend you enable "Trim sprite names".
  If your atlas software has an option to "rotate" the resulting frames, you must disable it.

  You can choose to either load the data externally, by providing a URL to an xml file.
  Or you can pass in an XML object or String via the `atlasData` parameter.
  If you pass a String the data is automatically run through `Loader.parseXML` and then immediately added to the Phaser.Cache.

  If URLs are provided the files are not loaded immediately after calling this method, but are added to the load queue.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getImage(key)`. XML files are automatically parsed upon load.
  If you need to control when the XML is parsed then use `Loader.text` instead and parse the XML file as needed.

  The URLs can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the textureURL isn't specified then the Loader will take the key and create a filename from that.
  For example if the key is "player" and textureURL is null then the Loader will set the URL to be "player.png".
  The same is true for the atlasURL. If atlasURL isn't specified and no atlasData has been provided then the Loader will
  set the atlasURL to be the key. For example if the key is "player" the atlasURL will be set to "player.xml".

  If you do not desire this action then provide URLs and / or a data object.

  ##### Parameters:

  Name | Type | Argument | Description
  --- | --- | --- | ---
  `key` | string |  | Unique asset key of the texture atlas file.
  `textureURL` | string | <optional> | URL of the texture atlas image file. If undefined or `null` the url will be set to `<key>.png`, i.e. if `key` was "alien" then the URL will be "alien.png".
  `atlasURL` | string | <optional> | URL of the texture atlas data file. If undefined or `null` and no atlasData is given, the url will be set to `<key>.json`, i.e. if `key` was "alien" then the URL will be "alien.xml".
  `atlasData` | object | <optional> | An XML data object. You don't need this if the data is being loaded from a URL.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1490

#### audio(key, urls, autoDecode) → {Phaser.Loader}

  Adds an audio file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getSound(key)`.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  Mobile warning: There are some mobile devices (certain iPad 2 and iPad Mini revisions) that cannot play 48000 Hz audio.
  When they try to play the audio becomes extremely distorted and buzzes, eventually crashing the sound system.
  The solution is to use a lower encoding rate such as 44100 Hz.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the audio file.
  `urls` | string | Array.<string> | Array.<object> |  |  | Either a single string or an array of URIs or pairs of `{uri: .., type: ..}`. If an array is specified then the first URI (or URI + mime pair) that is device-compatible will be selected. For example: `"jump.mp3"`, `['jump.mp3', 'jump.ogg', 'jump.m4a']`, or `[{uri: "data:<opus_resource>", type: 'opus'}, 'fallback.mp3']`. BLOB and DATA URIs can be used but only support automatic detection when used in the pair form; otherwise the format must be manually checked before adding the resource.
  `autoDecode` | boolean | <optional> | true | When using Web Audio the audio files can either be decoded at load time or run-time. Audio files can't be played until they are decoded and, if specified, this enables immediate decoding. Decoding is a non-blocking async process, however it consumes huge amounts of CPU time on mobiles especially.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 991

#### audioSprite(key, urls, jsonURL, jsonData, autoDecode) → {Phaser.Loader}

  Adds an audio sprite file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Audio Sprites are a combination of audio files and a JSON configuration.

  The JSON follows the format of that created by https://github.com/tonistiigi/audiosprite

  Retrieve the file via `Cache.getSoundData(key)`.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the audio file.
  `urls` | Array | string |  |  | An array containing the URLs of the audio files, i.e.: [ 'audiosprite.mp3', 'audiosprite.ogg', 'audiosprite.m4a' ] or a single string containing just one URL.
  `jsonURL` | string | <optional> | null | The URL of the audiosprite configuration JSON object. If you wish to pass the data directly set this parameter to null.
  `jsonData` | string | object | <optional> | null | A JSON object or string containing the audiosprite configuration data. This is ignored if jsonURL is not null.
  `autoDecode` | boolean | <optional> | true | When using Web Audio the audio files can either be decoded at load time or run-time. Audio files can't be played until they are decoded and, if specified, this enables immediate decoding. Decoding is a non-blocking async process, however it consumes huge amounts of CPU time on mobiles especially.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1034

#### audiosprite(key, urls, jsonURL, jsonData, autoDecode) → {Phaser.Loader}

  A legacy alias for Loader.audioSprite. Please see that method for documentation.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the audio file.
  `urls` | Array | string |  |  | An array containing the URLs of the audio files, i.e.: [ 'audiosprite.mp3', 'audiosprite.ogg', 'audiosprite.m4a' ] or a single string containing just one URL.
  `jsonURL` | string | <optional> | null | The URL of the audiosprite configuration JSON object. If you wish to pass the data directly set this parameter to null.
  `jsonData` | string | object | <optional> | null | A JSON object or string containing the audiosprite configuration data. This is ignored if jsonURL is not null.
  `autoDecode` | boolean | <optional> | true | When using Web Audio the audio files can either be decoded at load time or run-time. Audio files can't be played until they are decoded and, if specified, this enables immediate decoding. Decoding is a non-blocking async process, however it consumes huge amounts of CPU time on mobiles especially.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1093

#### binary(key, url, callback, callbackContext) → {Phaser.Loader}

  Adds a binary file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getBinary(key)`.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "alien"
  and no URL is given then the Loader will set the URL to be "alien.bin". It will always add `.bin` as the extension.
  If you do not desire this action then provide a URL.

  It will be loaded via xhr with a responseType of "arraybuffer". You can specify an optional callback to process the file after load.
  When the callback is called it will be passed 2 parameters: the key of the file and the file data.

  WARNING: If a callback is specified the data will be set to whatever it returns. Always return the data object, even if you didn't modify it.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the binary file.
  `url` | string | <optional> |  | URL of the binary file. If undefined or `null` the url will be set to `<key>.bin`, i.e. if `key` was "alien" then the URL will be "alien.bin".
  `callback` | function | <optional> | (none) | Optional callback that will be passed the file after loading, so you can perform additional processing on it.
  `callbackContext` | object | <optional> |  | The context under which the callback will be applied. If not specified it will use the callback itself as the context.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 911

#### bitmapFont(key, textureURL, atlasURL, atlasData, xSpacing, ySpacing) → {Phaser.Loader}

  Adds Bitmap Font files to the current load queue.

  To create the Bitmap Font files you can use:

  BMFont (Windows, free): http://www.angelcode.com/products/bmfont/
  Glyph Designer (OS X, commercial): http://www.71squared.com/en/glyphdesigner
  Littera (Web-based, free): http://kvazars.com/littera/

  You can choose to either load the data externally, by providing a URL to an xml file.
  Or you can pass in an XML object or String via the `xmlData` parameter.
  If you pass a String the data is automatically run through `Loader.parseXML` and then immediately added to the Phaser.Cache.

  If URLs are provided the files are not loaded immediately after calling this method, but are added to the load queue.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getBitmapFont(key)`. XML files are automatically parsed upon load.
  If you need to control when the XML is parsed then use `Loader.text` instead and parse the XML file as needed.

  The URLs can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the textureURL isn't specified then the Loader will take the key and create a filename from that.
  For example if the key is "megaFont" and textureURL is null then the Loader will set the URL to be "megaFont.png".
  The same is true for the atlasURL. If atlasURL isn't specified and no atlasData has been provided then the Loader will
  set the atlasURL to be the key. For example if the key is "megaFont" the atlasURL will be set to "megaFont.xml".

  If you do not desire this action then provide URLs and / or a data object.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the bitmap font.
  `textureURL` | string |  |  | URL of the Bitmap Font texture file. If undefined or `null` the url will be set to `<key>.png`, i.e. if `key` was "megaFont" then the URL will be "megaFont.png".
  `atlasURL` | string |  |  | URL of the Bitmap Font atlas file (xml/json). If undefined or `null` AND `atlasData` is null, the url will be set to `<key>.xml`, i.e. if `key` was "megaFont" then the URL will be "megaFont.xml".
  `atlasData` | object |  |  | An optional Bitmap Font atlas in string form (stringified xml/json).
  `xSpacing` | number | <optional> | 0 | If you'd like to add additional horizontal spacing between the characters then set the pixel value here.
  `ySpacing` | number | <optional> | 0 | If you'd like to add additional vertical spacing between the lines then set the pixel value here.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1307

#### checkKeyExists(type, key) → {boolean}

  Check whether a file/asset with a specific key is queued to be loaded.

  To access a loaded asset use Phaser.Cache, eg. Phaser.Cache#checkImageKey

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `type` | string | The type asset you want to check.
  `key` | string | Key of the asset you want to check.

  ##### Returns:

  boolean -

  Return true if exists, otherwise return false.

  Source - loader/Loader.js, line 390

#### getAsset(type, key) → {any}

  Find a file/asset with a specific key.

  Only assets in the download file queue will be found.

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `type` | string | The type asset you want to check.
  `key` | string | Key of the asset you want to check.

  ##### Returns:

  any -

  Returns an object if found that has 2 properties: `index` and `file`; otherwise a non-true value is returned.
  The index may change and should only be used immediately following this call.

  Source - loader/Loader.js, line 441

#### getAssetIndex(type, key) → {number}

  Get the queue-index of the file/asset with a specific key.

  Only assets in the download file queue will be found.

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `type` | string | The type asset you want to check.
  `key` | string | Key of the asset you want to check.

  ##### Returns:

  number -

  The index of this key in the filelist, or -1 if not found.
  The index may change and should only be used immediately following this call

  Source - loader/Loader.js, line 406

#### image(key, url, overwrite) → {Phaser.Loader}

  Adds an Image to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  Phaser can load all common image types: png, jpg, gif and any other format the browser can natively handle.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the image via `Cache.getImage(key)`

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "alien"
  and no URL is given then the Loader will set the URL to be "alien.png". It will always add `.png` as the extension.
  If you do not desire this action then provide a URL.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of this image file.
  `url` | string | <optional> |  | URL of an image file. If undefined or `null` the url will be set to `<key>.png`, i.e. if `key` was "alien" then the URL will be "alien.png".
  `overwrite` | boolean | <optional> | false | If an unloaded file with a matching key already exists in the queue, this entry will overwrite it.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 693

#### images(keys, urls) → {Phaser.Loader}

  Adds an array of images to the current load queue.

  It works by passing each element of the array to the Loader.image method.

  The files are not loaded immediately after calling this method. The files are added to the queue ready to be loaded when the loader starts.

  Phaser can load all common image types: png, jpg, gif and any other format the browser can natively handle.

  The keys must be unique Strings. They are used to add the files to the Phaser.Cache upon successful load.

  Retrieve the images via `Cache.getImage(key)`

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "alien"
  and no URL is given then the Loader will set the URL to be "alien.png". It will always add `.png` as the extension.
  If you do not desire this action then provide a URL.

  ##### Parameters:

  Name | Type | Argument | Description
  --- | --- | --- | ---
  `keys` | array |  | An array of unique asset keys of the image files.
  `urls` | array | <optional> | Optional array of URLs. If undefined or `null` the url will be set to `<key>.png`, i.e. if `key` was "alien" then the URL will be "alien.png". If provided the URLs array length must match the keys array length.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 722

#### json(key, url, overwrite) → {Phaser.Loader}

  Adds a JSON file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getJSON(key)`. JSON files are automatically parsed upon load.
  If you need to control when the JSON is parsed then use `Loader.text` instead and parse the text file as needed.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "alien"
  and no URL is given then the Loader will set the URL to be "alien.json". It will always add `.json` as the extension.
  If you do not desire this action then provide a URL.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the json file.
  `url` | string | <optional> |  | URL of the JSON file. If undefined or `null` the url will be set to `<key>.json`, i.e. if `key` was "alien" then the URL will be "alien.json".
  `overwrite` | boolean | <optional> | false | If an unloaded file with a matching key already exists in the queue, this entry will overwrite it.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 794

#### pack(key, url, data, callbackContext) → {Phaser.Loader}

  Add a JSON resource pack ('packfile') to the Loader.

  A packfile is a JSON file that contains a list of assets to the be loaded.
  Please see the example 'loader/asset pack' in the Phaser Examples repository.

  Packs are always put before the first non-pack file that is not loaded / loading.

  This means that all packs added before any loading has started are added to the front
  of the file queue, in the order added.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  The URL of the packfile can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of this resource pack.
  `url` | string | <optional> |  | URL of the Asset Pack JSON file. If you wish to pass a json object instead set this to null and pass the object as the data parameter.
  `data` | object | <optional> |  | The Asset Pack JSON data. Use this to pass in a json data object rather than loading it from a URL. TODO
  `callbackContext` | object | <optional> | (loader) | Some Loader operations, like Binary and Script require a context for their callbacks. Pass the context here.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 613

#### physics(key, url, data, format) → {Phaser.Loader}

  Adds a physics data file to the current load queue.

  The data must be in `Lime + Corona` JSON format. Physics Editor by code'n'web exports in this format natively.

  You can choose to either load the data externally, by providing a URL to a json file.
  Or you can pass in a JSON object or String via the `data` parameter.
  If you pass a String the data is automatically run through `JSON.parse` and then immediately added to the Phaser.Cache.

  If a URL is provided the file is not loaded immediately after calling this method, but is added to the load queue.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getJSON(key)`. JSON files are automatically parsed upon load.
  If you need to control when the JSON is parsed then use `Loader.text` instead and parse the text file as needed.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified and no data is given then the Loader will take the key and create a filename from that.
  For example if the key is "alien" and no URL or data is given then the Loader will set the URL to be "alien.json".
  It will always use `.json` as the extension.

  If you do not desire this action then provide a URL or data object.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the physics json data.
  `url` | string | <optional> |  | URL of the physics data file. If undefined or `null` and no data is given the url will be set to `<key>.json`, i.e. if `key` was "alien" then the URL will be "alien.json".
  `data` | object | string | <optional> |  | An optional JSON data object. If given then the url is ignored and this JSON object is used for physics data instead.
  `format` | string | <optional> | Phaser.Physics.LIME_CORONA_JSON | The format of the physics data.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1246

#### <internal> removeAll()

  Remove all file loading requests - this is insufficient to stop current loading. Use `reset` instead.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 1722

#### <internal> removeFile(type, key)

  Remove a file/asset from the loading queue.

  A file that is loaded or has started loading cannot be removed.

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `type` | string | The type of resource to add to the list (image, audio, xml, etc).
  `key` | string | Key of the file you want to remove.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 1698

#### <internal> replaceInFileList(type, key, url, properties)

  Internal function that replaces an existing entry in the file list with a new one. Do not call directly.

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `type` | string | The type of resource to add to the list (image, audio, xml, etc).
  `key` | string | The unique Cache ID key of this resource.
  `url` | string | The URL the asset will be loaded from.
  `properties` | object | Any additional properties needed to load the file.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 597

#### <internal> reset(hard, clearEvents)

  Reset the loader and clear any queued assets. If `Loader.resetLocked` is true this operation will abort.

  This will abort any loading and clear any queued assets.

  Optionally you can clear any associated events.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `hard` | boolean | <optional> | false | If true then the preload sprite and other artifacts may also be cleared.
  `clearEvents` | boolean | <optional> | false | If true then the all Loader signals will have removeAll called on them.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 465

#### <internal> resize()

  Called automatically by ScaleManager when the game resizes in RESIZE scalemode.

  This can be used to adjust the preloading sprite size, eg.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 373

#### script(key, url, callback, callbackContext) → {Phaser.Loader}

  Adds a JavaScript file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "alien"
  and no URL is given then the Loader will set the URL to be "alien.js". It will always add `.js` as the extension.
  If you do not desire this action then provide a URL.

  Upon successful load the JavaScript is automatically turned into a script tag and executed, so be careful what you load!

  A callback, which will be invoked as the script tag has been created, can also be specified.
  The callback must return relevant `data`.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the script file.
  `url` | string | <optional> |  | URL of the JavaScript file. If undefined or `null` the url will be set to `<key>.js`, i.e. if `key` was "alien" then the URL will be "alien.js".
  `callback` | function | <optional> | (none) | Optional callback that will be called after the script tag has loaded, so you can perform additional processing.
  `callbackContext` | object | <optional> | (loader) | The context under which the callback will be applied. If not specified it will use the Phaser Loader as the context.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 876

#### setPreloadSprite(sprite, direction)

  Set a Sprite to be a "preload" sprite by passing it to this method.

  A "preload" sprite will have its width or height crop adjusted based on the percentage of the loader in real-time.
  This allows you to easily make loading bars for games.

  The sprite will automatically be made visible when calling this.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `sprite` | Phaser.Sprite | Phaser.Image |  |  | The sprite or image that will be cropped during the load.
  `direction` | number | <optional> | 0 | A value of zero means the sprite will be cropped horizontally, a value of 1 means its will be cropped vertically.

  Source - loader/Loader.js, line 338

#### shader(key, url, overwrite) → {Phaser.Loader}

  Adds a fragment shader file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getShader(key)`.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "blur"
  and no URL is given then the Loader will set the URL to be "blur.frag". It will always add `.frag` as the extension.
  If you do not desire this action then provide a URL.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the fragment file.
  `url` | string | <optional> |  | URL of the fragment file. If undefined or `null` the url will be set to `<key>.frag`, i.e. if `key` was "blur" then the URL will be "blur.frag".
  `overwrite` | boolean | <optional> | false | If an unloaded file with a matching key already exists in the queue, this entry will overwrite it.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 822

#### spritesheet(key, url, frameWidth, frameHeight, frameMax, margin, spacing) → {Phaser.Loader}

  Adds a Sprite Sheet to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  To clarify the terminology that Phaser uses: A Sprite Sheet is an image containing frames, usually of an animation, that are all equal
  dimensions and often in sequence. For example if the frame size is 32x32 then every frame in the sprite sheet will be that size.
  Sometimes (outside of Phaser) the term "sprite sheet" is used to refer to a texture atlas.
  A Texture Atlas works by packing together images as best it can, using whatever frame sizes it likes, often with cropping and trimming
  the frames in the process. Software such as Texture Packer, Flash CC or Shoebox all generate texture atlases, not sprite sheets.
  If you've got an atlas then use `Loader.atlas` instead.

  The key must be a unique String. It is used to add the image to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getImage(key)`. Sprite sheets, being image based, live in the same Cache as all other Images.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "alien"
  and no URL is given then the Loader will set the URL to be "alien.png". It will always add `.png` as the extension.
  If you do not desire this action then provide a URL.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the sheet file.
  `url` | string |  |  | URL of the sprite sheet file. If undefined or `null` the url will be set to `<key>.png`, i.e. if `key` was "alien" then the URL will be "alien.png".
  `frameWidth` | number |  |  | Width in pixels of a single frame in the sprite sheet.
  `frameHeight` | number |  |  | Height in pixels of a single frame in the sprite sheet.
  `frameMax` | number | <optional> | -1 | How many frames in this sprite sheet. If not specified it will divide the whole image into frames.
  `margin` | number | <optional> | 0 | If the frames have been drawn with a margin, specify the amount here.
  `spacing` | number | <optional> | 0 | If the frames have been drawn with spacing between them, specify the amount here.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 949

#### start()

  Start loading the assets. Normally you don't need to call this yourself as the StateManager will do so.

  Source - loader/Loader.js, line 1735

#### text(key, url, overwrite) → {Phaser.Loader}

  Adds a Text file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getText(key)`

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "alien"
  and no URL is given then the Loader will set the URL to be "alien.txt". It will always add `.txt` as the extension.
  If you do not desire this action then provide a URL.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the text file.
  `url` | string | <optional> |  | URL of the text file. If undefined or `null` the url will be set to `<key>.txt`, i.e. if `key` was "alien" then the URL will be "alien.txt".
  `overwrite` | boolean | <optional> | false | If an unloaded file with a matching key already exists in the queue, this entry will overwrite it.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 767

#### tilemap(key, url, data, format) → {Phaser.Loader}

  Adds a Tile Map data file to the current load queue.

  Phaser can load data in two different formats: CSV and Tiled JSON.

  Tiled is a free software package, specifically for creating tilemaps, and is available from http://www.mapeditor.org

  You can choose to either load the data externally, by providing a URL to a json file.
  Or you can pass in a JSON object or String via the `data` parameter.
  If you pass a String the data is automatically run through `JSON.parse` and then immediately added to the Phaser.Cache.

  If a URL is provided the file is not loaded immediately after calling this method, but is added to the load queue.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getTilemapData(key)`. JSON files are automatically parsed upon load.
  If you need to control when the JSON is parsed then use `Loader.text` instead and parse the text file as needed.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified and no data is given then the Loader will take the key and create a filename from that.
  For example if the key is "level1" and no URL or data is given then the Loader will set the URL to be "level1.json".
  If you set the format to be Tilemap.CSV it will set the URL to be "level1.csv" instead.

  If you do not desire this action then provide a URL or data object.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the tilemap data.
  `url` | string | <optional> |  | URL of the tile map file. If undefined or `null` and no data is given the url will be set to `<key>.json`, i.e. if `key` was "level1" then the URL will be "level1.json".
  `data` | object | string | <optional> |  | An optional JSON data object. If given then the url is ignored and this JSON object is used for map data instead.
  `format` | number | <optional> | Phaser.Tilemap.CSV | The format of the map data. Either Phaser.Tilemap.CSV or Phaser.Tilemap.TILED_JSON.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1165

#### <internal> totalLoadedFiles() → {number}

  Returns the number of files that have already been loaded, even if they errored.

  ##### Returns:

  number -

  The number of files that have already been loaded (even if they errored)

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 2988

#### <internal> totalLoadedPacks() → {number}

  Returns the number of asset packs that have already been loaded, even if they errored.

  ##### Returns:

  number -

  The number of asset packs that have already been loaded (even if they errored)

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 3014

#### <internal> totalQueuedFiles() → {number}

  Returns the number of files still waiting to be processed in the load queue. This value decreases as each file in the queue is loaded.

  ##### Returns:

  number -

  The number of files that still remain in the load queue.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 3001

#### <internal> totalQueuedPacks() → {number}

  Returns the number of asset packs still waiting to be processed in the load queue. This value decreases as each pack in the queue is loaded.

  ##### Returns:

  number -

  The number of asset packs that still remain in the load queue.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 3027

#### <internal> transformUrl(url, file) → {string}

  Transforms the asset URL.

  The default implementation prepends the baseURL if the url doesn't begin with http or //

  ##### Parameters:

  Name | Type | Description
  --- | --- | ---
  `url` | string | The url to transform.
  `file` | object | The file object being transformed.

  ##### Returns:

  string -

  The transformed url. In rare cases where the url isn't specified it will return false instead.

  Internal:
    - This member is internal (protected) and may be modified or removed in the future.
  Source - loader/Loader.js, line 2063

#### video(key, urls, loadEvent, asBlob) → {Phaser.Loader}

  Adds a video file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getVideo(key)`.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  You don't need to preload a video in order to play it in your game. See `Video.createVideoFromURL` for details.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the video file.
  `urls` | string | Array.<string> | Array.<object> |  |  | Either a single string or an array of URIs or pairs of `{uri: .., type: ..}`. If an array is specified then the first URI (or URI + mime pair) that is device-compatible will be selected. For example: `"boom.mp4"`, `['boom.mp4', 'boom.ogg', 'boom.webm']`, or `[{uri: "data:<opus_resource>", type: 'opus'}, 'fallback.mp4']`. BLOB and DATA URIs can be used but only support automatic detection when used in the pair form; otherwise the format must be manually checked before adding the resource.
  `loadEvent` | string | <optional> | 'canplaythrough' | This sets the Video source event to listen for before the load is considered complete. 'canplaythrough' implies the video has downloaded enough, and bandwidth is high enough that it can be played to completion. 'canplay' implies the video has downloaded enough to start playing, but not necessarily to finish. 'loadeddata' just makes sure that the video meta data and first frame have downloaded. Phaser uses this value automatically if the browser is detected as being Firefox and no `loadEvent` is given, otherwise it defaults to `canplaythrough`.
  `asBlob` | boolean | <optional> | false | Video files can either be loaded via the creation of a video element which has its src property set. Or they can be loaded via xhr, stored as binary data in memory and then converted to a Blob. This isn't supported in IE9 or Android 2. If you need to have the same video playing at different times across multiple Sprites then you need to load it as a Blob.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1111

#### withSyncPoints(callback, callbackContext) → {Phaser.Loader}

  Add a synchronization point to the assets/files added within the supplied callback.

  A synchronization point denotes that an asset must be completely loaded before
  subsequent assets can be loaded. An asset marked as a sync-point does not need to wait
  for previous assets to load (unless they are sync-points). Resources, such as packs, may still
  be downloaded around sync-points, as long as they do not finalize loading.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `callback` | function |  |  | The callback is invoked and is supplied with a single argument: the loader.
  `callbackContext` | object | <optional> | (loader) | Context for the callback.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 1649

#### xml(key, url, overwrite) → {Phaser.Loader}

  Adds an XML file to the current load queue.

  The file is not loaded immediately after calling this method. The file is added to the queue ready to be loaded when the loader starts.

  The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

  Retrieve the file via `Cache.getXML(key)`.

  The URL can be relative or absolute. If the URL is relative the `Loader.baseURL` and `Loader.path` values will be prepended to it.

  If the URL isn't specified the Loader will take the key and create a filename from that. For example if the key is "alien"
  and no URL is given then the Loader will set the URL to be "alien.xml". It will always add `.xml` as the extension.
  If you do not desire this action then provide a URL.

  ##### Parameters:

  Name | Type | Argument | Default | Description
  --- | --- | --- | --- | ---
  `key` | string |  |  | Unique asset key of the xml file.
  `url` | string | <optional> |  | URL of the XML file. If undefined or `null` the url will be set to `<key>.xml`, i.e. if `key` was "alien" then the URL will be "alien.xml".
  `overwrite` | boolean | <optional> | false | If an unloaded file with a matching key already exists in the queue, this entry will overwrite it.

  ##### Returns:

  Phaser.Loader -

  This Loader instance.

  Source - loader/Loader.js, line 849