The example in the README results in all children being walked. about react-tree-walker HOT 3 CLOSED

class Foo extends React.Component {
  getData() {
    return Promise.resolve(this.props.value);
  }
  getDataSync() {
    return this.props.value;
  }
  render() {
    return <div>{this.props.children}</div>;
  }
}

function visitor(element, instance, context) {
  if (instance && typeof instance.getDataSync) {
    let value = instance.getDataSync();
    values.push(value);
    return value === 4 ? false : true;
  }
  return true;
}
// result: [1,2,4,3]

function visitor(element, instance, context) {
  if (instance && typeof instance.getData) {
    return instance.getData().then(value => {
      values.push(value);
      return value === 4 ? false : true;
    });
  }
  return true;
}
// result: [1,2,4,5,3]