======Unit======

''Inherits:HTMLElement''

=====Overview=====

The Unit object is the core of BitsmistJS. It inherits from HTMLElement and thus takes over the functionality of a standard HTML element. When creating your own units, you create them by inheriting from this Unit class.

=====Properties=====

====uniqueId====

''Type:String'' ''Target:Prototype'' ''get''

A unique ID assigned to each instance of the unit. It is automatically generated. BITSMIST.V1.Unit static class always returns "00000000-0000-0000-0000-000000000000".

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====assets====

''Type:Object'' ''get''

The object that holds assets.

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====ready====

''Type:Promise'' ''get''

The promise that is resolved when a unit is ready.

=====Methods=====

====get(assetName, key, defaultValue)====

''Type:*'' ''Target:Prototype''

Returns the value from the asset.

===Parameters===

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^Parameter^Type^Description^
|assetName \\ ''Required''|String| The asset name.|
|key \\ ''Required''|String|The key in the asset to be retrieved.|
|defaultValue|*|Returns this value if the specified key is not found in the asset.|

===Return Value===

The value obtained from the asset.

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====has(assetName, key)====

''Type:Boolean'' ''Target:Prototype''

Returns whether the asset has the specified key.

===Parameters===

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^Parameter^Type^Description^
|assetName \\ ''Required''|String| The asset name.|
|key \\ ''Required''|String|The key in the asset to be checked.|

===Return Value===

True if the key exists, False if not.

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====set(assetName, key, value)====

''Type:Undefined'' ''Target:Prototype''

Sets the value to the asset.

===Parameters===

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^Parameter^Type^Description^
|assetName \\ ''Required''|String| The asset name.|
|key \\ ''Required''|String|The key in the asset to be set.|
|value|*|The value to set.|

===Return Value===

Undefined.

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====upgrade(unit, type, name, content)====

''Type:Undefined'' ''static''

Upgrades the unit. The type of upgrade varies depending on the type argument.

^type^Description^
|"asset"|Adds the asset to the unit. Specify the asset name for the "name" and content holder for the "content" parameter.|
|"method"|Adds the method to the unit. Specify the method name for the "name" and the Function object for "the content" parameter.|
|"property"|Adds the property to the unit. Specify the property name for the "name" and the getter/setter for the "content" parameter.|
|others|Adds content to the asset specified by the "name" parameter with the "content" parameter.|

===Paramters===

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^Parameter^Type^Description^
|unit \\ ''Required''|Unit|The unit to be upgraded.|
|type \\ ''Required''|String|The upgrade type. Valid types are "asset", "method", "property" and the asset names.|
|name \\ ''Required''|String|The name of the item to be upgraded.|
|content \\ ''Required''|*|The content of upgrade.|

===Return Value===

Undefined.