Method background

src/components/component.ts:707–709

* Gets the Selection containing the behind the visual elements of the Component. * * Will return undefined if the Component has not been anchored. * * @return {d3.Selection} background selection for the Component

()

   * @return {d3.Selection} background selection for the Component
   */
  public background(): SimpleSelection<void> {
    return this._backgroundContainer;
  }
}