napi_get_reference_value
NAPI_EXTERN napi_status napi_get_reference_value(napi_env env,
                                                 napi_ref ref,
                                                 napi_value* result); 这些方法中的 napi_value passed 是与引用相关的对象的句柄。
¥the napi_value passed in or out of these methods is a handle to the
object to which the reference is related.
- 
[in] env:调用 API 的环境。¥
[in] env: The environment that the API is invoked under. - 
[in] ref:我们请求对应的Object的napi_ref。¥
[in] ref:napi_reffor which we requesting the correspondingObject. - 
[out] result:napi_ref引用的Object的napi_value。¥
[out] result: Thenapi_valuefor theObjectreferenced by thenapi_ref. 
如果 API 成功,则返回 napi_ok。
¥Returns napi_ok if the API succeeded.
如果仍然有效,则此 API 返回 napi_value,表示与 napi_ref 关联的 JavaScript Object。否则,结果将为 NULL。
¥If still valid, this API returns the napi_value representing the
JavaScript Object associated with the napi_ref. Otherwise, result
will be NULL.