{
  "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
  "keywords": [],
  "children": [
    {
      "属性/字面量": {
        "keywords": [],
        "children": []
      }
    },
    {
      "in 、for…in": {
        "keywords": [],
        "children": []
      }
    },
    {
      "对象引用": {
        "keywords": [],
        "children": []
      }
    },
    {
      "深拷贝、浅拷贝": {
        "keywords": [],
        "children": []
      }
    },
    {
      "Symbol": {
        "keywords": [],
        "children": []
      }
    },
    {
      "垃圾收集机制": {
        "keywords": [],
        "children": []
      }
    },
    {
      "this": {
        "keywords": [],
        "children": []
      }
    },
    {
      "new": {
        "keywords": [],
        "children": []
      }
    },
    {
      "Optional chaining ‘?.’": {
        "keywords": [],
        "children": []
      }
    },
    {
      "类型转换Symbol.toPrimitive": {
        "keywords": [],
        "children": []
      }
    },
    {
      "Property flags、descriptors": {
        "keywords": [],
        "children": []
      }
    },
    {
      "getters、setters": {
        "keywords": [],
        "children": []
      }
    }
  ],
  "export": []
}