Method onChange

packages/shell/src/model/active-tracker.ts:31–45

(fn: (target: IPublicTypeActiveTarget) => void)

  }

  onChange(fn: (target: IPublicTypeActiveTarget) => void): () => void {
    if (!fn) {
      return () => {};
    }
    return this[activeTrackerSymbol].onChange((t: ActiveTarget) => {
      const { node: innerNode, detail, instance } = t;
      const publicNode = ShellNode.create(innerNode);
      const publicActiveTarget = {
        node: publicNode!,
        detail,
        instance,
      };
      fn(publicActiveTarget);
    });
  }

  track(node: IPublicModelNode) {
    this[activeTrackerSymbol].track((node as any)[nodeSymbol]);