getChildIndex(child) → {Number} Returns the index position of a child DisplayObject instance

contains(child) → {Boolean} Determines whether the specified display object is a child of the D

addChild(child) → {DisplayObject}

height : number The height of the displayObjectContainer, setting this will actually modify the scale to achieve the value set

removeChildren(beginIndex, endIndex) Removes all children from this container that are within the begin and end indexes.

backgroundColor : number | string Gets and sets the background color of the stage. The color can be given as a number: 0xff0000

postUpdate() This is called automatically before the renderer runs and after the plugins have updated.In postUpdate this is where

new Stage(game) The Stage controls root level display objects upon which everything is displayed.It also handles browser visibility

checkVisibility() Starts a page visibility event listener running, or window.onpagehide/onpageshow if not supported by the browser.

preUpdate() This is called automatically after the plugins preUpdate and before the State.update.Most objects have preUpdate methods