Javascript 为什么我不能使用计算结果为相同字符串的不同类型访问对象属性？

ResourceType是一个对象，其属性是NodeType的值

ResourceType.engine===NodeType.engine===“引擎”

为什么我不能使用NodeType的值来访问对象的值，当它们都计算为同一个字符串时，该值由ResourceType的值进行键控

export declare enum NodeType {
    engine = "engine",
    agent = "agent",
    api = "api",
    pluginBuilder = "plugin-builder"
}

export class ResourceType {
  public static agent: NodeType.agent;
  public static engine: NodeType.engine;
}   

export class ResourceQuotaException extends HttpMetaException {
  constructor(resourceType: NodeType) {
    // Error message gets passed as first parameter
    super(ResourceQuotaException.MESSAGES[resourceType], HttpStatus.BAD_REQUEST);
  }
  public static readonly MESSAGES = {
    [ResourceType.agent]: 'Agent Limit Reached',
    [ResourceType.engine]: 'Engine Limit Reached'
  };
}
  
  throw new ResourceQuotaException(NodeType.engine); // Message is undefined

---

这是我的一个错误

而不是

export class ResourceType {
  public static agent: NodeType.agent;
  public static engine: NodeType.engine;
}  

应该是

export class ResourceType {
  public static agent = NodeType.agent;
  public static engine = NodeType.engine;
}  

---

这是我的一个错误

而不是

export class ResourceType {
  public static agent: NodeType.agent;
  public static engine: NodeType.engine;
}  

应该是

export class ResourceType {
  public static agent = NodeType.agent;
  public static engine = NodeType.engine;
}