Function add

src/Container.ts:119–145

* add a child and children into container * @name Konva.Container#add * @method * @param {...Konva.Node} children * @returns {Container} * @example * layer.add(rect); * layer.add(shape1, shape2, shape3); * // empty arrays are accepted, though each individual child must be def

(...children: ChildType[])

   * layer.add(...shapes);
   */
  add(...children: ChildType[]) {
    if (children.length === 0) {
      return this;
    }
    if (children.length > 1) {
      for (let i = 0; i < children.length; i++) {
        this.add(children[i]);
      }
      return this;
    }
    const child = children[0];
    if (child.getParent()) {
      child.moveTo(this);
      return this;
    }
    this._validateAdd(child);
    child.index = this.getChildren().length;
    child.parent = this;
    child._clearCaches();
    this.getChildren().push(child);
    this._fire('add', {
      child: child,
    });
    this._requestDraw();
    // chainable
    return this;
  }
  destroy() {
    if (this.hasChildren()) {
      this.destroyChildren();