角（2）树。双击问题。不能正常工作。

Question

双击角树组件不起作用，这是我尝试使用的代码示例。我是否需要在代码中编写其他内容，以便它可以工作？请帮我解决这个问题。谢谢。

import { Component, Input } from '@angular/core';
import { TreeNode, TreeModel, TREE_ACTIONS, KEYS, IActionMapping, ITreeOptions } from 'angular-tree-component';

const actionMapping:IActionMapping = {
  mouse: {
    contextMenu: (tree, node, $event) => {
      $event.preventDefault();
      alert(`context menu for ${node.data.name}`);
    },
    dblClick: (tree, node, $event) => {
      if (node.hasChildren) {
        TREE_ACTIONS.TOGGLE_EXPANDED(tree, node, $event);
      }
    },
    click: (tree, node, $event) => {
      $event.shiftKey
        ? TREE_ACTIONS.TOGGLE_ACTIVE_MULTI(tree, node, $event)
        : TREE_ACTIONS.TOGGLE_ACTIVE(tree, node, $event);
    }
  },
  keys: {
    [KEYS.ENTER]: (tree, node, $event) => alert(`This is ${node.data.name}`)
  }
};