Method appendChild

packages/react-aria/src/collections/Document.ts:126–152

(child: ElementNode<T>)

  }

  appendChild(child: ElementNode<T>): void {
    if (child.parentNode) {
      child.parentNode.removeChild(child);
    }

    if (this.firstChild == null) {
      this.firstChild = child;
    }

    if (this.lastChild) {
      this.lastChild.nextSibling = child;
      child.index = this.lastChild.index + 1;
      child.previousSibling = this.lastChild;
    } else {
      child.previousSibling = null;
      child.index = 0;
    }

    child.parentNode = this;
    child.nextSibling = null;
    this.lastChild = child;

    this.ownerDocument.markDirty(this);
    if (this.isConnected) {
      this.ownerDocument.queueUpdate();
    }
  }

  insertBefore(newNode: ElementNode<T>, referenceNode: ElementNode<T>): void {
    if (referenceNode == null) {