Function attach

attach(widget, host, ref?): void
Attach a widget to a host DOM node.
Parameters
- widget: Widget
  The widget of interest.
- host: HTMLElement
  The DOM node to use as the widget's host.
- ref: null | HTMLElement = null
  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.
Returns void
- Defined in widgets/src/widget.ts:1081