napi_has_property
napi_status napi_has_property(napi_env env,
                              napi_value object,
                              napi_value key,
                              bool* result); - 
[in] env:调用 Node-API 调用的环境。¥
[in] env: The environment that the Node-API call is invoked under. - 
[in] object:要查询的对象。¥
[in] object: The object to query. - 
[in] key:要检查其存在的属性的名称。¥
[in] key: The name of the property whose existence to check. - 
[out] result:该属性是否存在于对象上。¥
[out] result: Whether the property exists on the object or not. 
如果 API 成功,则返回 napi_ok。
¥Returns napi_ok if the API succeeded.
此 API 检查传入的 Object 是否具有命名属性。
¥This API checks if the Object passed in has the named property.