Function attach

Parameters

• widget: Widget

  The widget of interest.

• host: HTMLElement

  The DOM node to use as the widget's host.

• Optionalref: null | HTMLElement

  The child of host to use as the reference element. If this is provided, the widget will be inserted before this node in the host. The default is null, which will cause the widget to be added as the last child of the host.

  Notes

  This will throw an error if the widget is not a root widget, if the widget is already attached, or if the host is not attached to the DOM.